摘要:The status and developing strategy of Chinese magnesium industry are summarized in the present paper. The output and export of Chinese magnesium ingot have rapidly increased in the recent ten years, but the magnesium products with high value, such as the wrought magnesium alloys, and their applications are insufficient. Chinese magnesium industry should develop toward the direction of large scale, specialization and collectivization in the future. The enterprises should enhance the level of management and reinforce the international competing ability with the help of governmental policies.

摘要:В настоящем докладе обсуждаются тенденции развития и конкретные применения лазерных и лазерно-информационных технологий в промышленности и медицине. 1. Технологии быстрого прототицирования (Rapid Prototyping -RP): -технология посойного лазерного синтеза трехмерных объектов из фотополимеров и ееприложения для CAD/RP/CAM (computer-aided design/RP/computer-aided manufacturing)технологий в машиностроении, аэрокосмической промышленности и использование данной технологии в биомедицинских приложениях для изготовления биоимплантов и биомоделей по томографическим данным пациентов, переаваемым по сетям Intеrnеt; -технология создания трехмерных обктов и тугоплвких материалов методом селективного лазерного спекания и возможность применения этой технологии для задач биоинженерии. 2. Концепции развития современных интеллектуальных лазерных медицинских систем и реализация таких систем применительно к задачам органосохранной медицины в онкологии и кардиохирургии. 3. Новое поколение диагностических систем дла хирургии и офтальмологии.

摘要:The oil steel pipe in the petroleum industry is very important for its high price, large consumption volume and great effect on thedevelopment of petroleum industry. The oil steel pipe mainly includes oil well pipe (drill pipe, drill collar, casing and tubing etc. ) and oil-gas transportation pipe. This paper is an attempt to make a comprehensive review on the current situation and prospect of the oil steel pipe in China, presenting the past , today and future of the China oil pipe.The first section is a historical review of the China oil pipe. The developing course and progress of the oil steel pipe products are presented. The second section is about the current situation of the China oil pipe. The general situation of the China's steel pipe corporation and their products types,capability, etc. is introduced. The third section is about the prospect of the China oil pipe. This part mainly describes the new product research and development in China steel pipe corporations,which are facing more and more strict technical requirements of the petroleum industry in oil pipe,and reveals the prosperity of China's steel pipe corporations.

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摘要:High dielectric constant (high-k) materials are vital tothe nanoelectronic devices.The paper reviews research development of high-k materials, describes a variety of manufacture technologies and discusses the application of the gate stack systems to non-classical device structures.

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摘要:The fast development of Chinese steel industry has drawn great attention from the world.Market n eeding and technical development are the main driving forces for the rapid development of Chinese steel industry. Based on the discussing of the reasons of its rapid development, the present paper further analyzed the main problems and distance towards the advanced level of international steel industry. It bring forward that Chinese steel industry should enhance the research and development on new generation steel materials and production process to ensure its sustainable development. Through populating the key technologies of syntheses energy saving and water saving to realize the main equipments self-making and establish a new recyclable steel production process.

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摘要:The relationship among the hydrogen storage properties, cycling characteristics and thermal parameters of the metal hydride air conditioning systems was investigated. Based on a new alloy selection model, three pairs of hydrogen storage alloys, LaNi4.4 Mn0.26 Al0.34 / La0.6 Nd0.4 Ni4.8 Mn0.2 Cu0. 1, LaNi4.61Mn0. 26 Al0.13/La0.6 Nd0.4 Ni4.8 Mn0.2 Cu0. 1 and LaNi4.61 Mn0.26 Al0.13/La0.6 Y0.4 Ni4.8 Mn0. 2, were selected as the working materials for the metal hydride air conditioning system. Studies on the factors affecting the COP of the system showed that higher COP and available hydrogen content need the proper operating temperature and cycling time,large hydrogen storage capacity, flat plateau and small hysterisis of hydrogen alloys, proper original input hydrogen content and mass ratio of the pair of alloys. It also needs small conditioning system was established by using LaNi4.61 Mn0.26 Al0. 13/La0.6 Y0.4 Ni4.8 Mn0.2 alloys as the working materials, which showed that under the operating temperature of 180℃/40℃, a low temperature of 13℃ was reached, with COP =0.38 and Wnet =0.09 kW/kg.

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摘要:Titanium and its alloys possess excellent comprehensive properties, and they are widely used in many fields. China pays great attentions to the research on new titanium alloys. This paper mainly reviews the research on new Ti alloys in China, for example, high strength and high toughness Ti alloys, burn resistant Tialloys, high temperature Ti alloys, low cost Ti alloys and so on.New basic theories on Ti alloys developed in China in recent years are also reviewed.

摘要:The current situations of thermal spraying materials in China are described in this paper.The thermal spraying technology in China has a great progress over tens of years. More than one hundred varieties of material products serve thermal spraying producing now. They belong to three kinds, powders,wires and rods. Technologies for producing alloy, ceramic and composite powders, alloy and cored wires,and oxide ceramic rods are applied to large-scale production. Many research and development works on advanced materials for thermal spraying are carrying out recent years. They show that the general tendencies of thermal spraying materials in China are composite or low-impurity component, ultrafine or nanosized microstructure, high properties, and specialized and systematized applications. Thermal spraying materials have great prospects with the development of saving society in China.

摘要:Hot press-sintering was adopted to fabricate inert cermets anodes based on the nickel aluminate and nickel ferrite for use in aluminum electrolysis research. The density of samples, fabricated by hot pressing, is close to the theoretic density. At 900℃, the electrical conductivity of the periments. Effect of anode current on nickel ferrite-based and the reason for it were studied. A theory is that a more uniform metal distribution by improving the hot pressing process gives increased corrosion resistance of the anode.

摘要:In framework of the National Key Basic Research Program (973 Program) we focus our attention on R&D of (1) continuous enhancement of composites performance both for new generation and existing materials, (2) cost-effective manufacturing technologies, particularly resin transfer molding (RTM) in conjunction with textile technology, and (3) crashworthy composite structures in design, and manufacturing and simulation methodology for aircrafts composites. Many successful examples stories such as ex-situ concept have been demonstrated that the performance potential of composites could be enhanced and maximized by basically understandirg the complicated multi-scale and multi-dimensional structural characteristics in relation to properties. Based on the concept, graphite composites system with generally high impact damage resistance and balanced processing conditions has being developed consisting of base resins, modifiers and binders/tackifiers.

摘要:Intelligent design and control of the microstructure to tailor properties of materials is the dream that materials scientists have been worked hard for many years. Formation of research area of computational materials science paves the way to realize the dream. Simulation of microstructure evolution is a chief branch of the computational materials science and has caused great attention from materials researchers. Multi-scale modeling gets popular just within 5- 6 years recently due to huge research works to try to shorten the distance between simulation and application. People have to command one or more classical simulation methods in order to do the multi-scale modeling so chief simulation methods will be discussed first and then more reviews in detail are given to the phase field simulation. The main part of the paper is carried out to introduce two key approaches to do the multi-scale modeling job. It is suggested that extension of the multiscale modeling is necessary to study the technologies to link microstructure simulation, processing simulation and property simulation each other as well as to build bridges between different simulation methods and between analytical models and numerical models.

摘要:A two-phase Mg-9Li-2Zn alloy sheet is made by cold-rolling at room temperature, and the formability of it at room temperature is investigated in this study. Uniaxial tension tests are carried out for various strain rates between 0. 5 mm/min and 250 mm/min, and the microstructural changes during the tests are observed. The sheet has high formability at comparatively low strain rates. Maximum elongation amounts to 40，. However, ductility decreases with the increase of strain rate. Even at room temperature, the stress is also sensitive to the strain rate. There are many large dimples at comparatively low strain rates, and small dimples occur at high strain rates, it shows fine sub-grains come into being.

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摘要:In order to improve the properties of NiFe2O4 spinel based inert anode, some additive MnO2 were added to raw materials. NiFe2O4 spinel with MnO2 was made by solid-phase reaction at 1200℃for 6 h. XRD were carried out and the effects of MnO2 on density, conductivity and corrosion resistance were measured. XRD shows when MnO2 was added no new phases exist and MnO2 and NiFe2O4 formed solid solution; Mn4+ replaced parts of Fe3+ and the sample still had the structure of NiFe2O4 spinel. The crystal lattice of NiFe2 O4 spinel became aberrated when MnO2 was added, which can promote sintering, and improve density. Because Mn4+ replaces parts of Fe3+ and produces conduction electron, which can improve conductivity.The corrosion resistance of the samples was enhanced. When MnO2 is 1.0，, the sample's corrosion rate is 1/5 of that of the sample without MnO2. The reason is that Al2 O3 in the melt reacts with Mn4+ in the sample to produce MnAl2O4. MnAl2 O4 forms a dense protecting coat, which can prevent melt from eroding further.Because the key problem with inert anodes is anode corrosion, so we consider the optimal amount of MnO2 is 1.0，.

摘要:It was studied the main regularities of mechanoelctric transformations in composites and developed electromagnetic methods of control of quality.

摘要:The isothermal oxidation behavior and mechanism of the TiC-TiB2 multiphase ceramics fabricated by self-propagating high temperature synthesis were studied. The result shows that the oxidation kinetics agr ees to the parabolic rule within the temperature rang of RT to 1000℃. First at 600℃ TiB2 was oxidized to be TiO2. Then both TiB2 and TiC were oxidized to be TiO2 when temperature increased to 1000℃. A compact TiO2 film, the oxidation product, formed on the sample surface, which prevented further oxidation and resulted in a very high oxidation resistance of the sample.

摘要:The purpose of this work was research into influence of ultra-violet radiation on size of run of regional and screw dislocations in beams of dislocation sockets, formed at indentation surface of alkali-halide crystals. In experiments it was used crystals NaCl, with the quantitative maintenance of impurity 10-2 -10-3weight，, the wave length of UV-radiation λ=250 nanometers, the sizes of samples 10mm× 20mm× 2mm,temperature of samples was constant T=290 K.It is established that indentation and the simultaneous irradiation of samples a ultraviolet is increases size of run of head dispositions in dislocation sockets..It is marked, that influence UV-radiation nonequivalence for various times of an exposition. At small times (till 5 minutes) the size of run grows. The length of beams increases on ～ 50 ，. At the further increase in time of influence of a ultraviolet the length of beams is reduced till the sizes corresponding stressing without an irradiation (Figs. 1, 2, 3). The effect is observed on dislocation beams of regional and screw orientations and most expressed at small loadings (in our experiments-10 grams) (Fig. 3).Observable effects are explained from positions dislocation-exciton interactions. At UV-radiation exciton cooperates with the charged step on a disposition, causing movement of a step along a disposition on one internuclear distance. Due to this interaction overcoming by a disposition of a grid of stoppers is facilitated.Big times of endurance cause a relaxation of pressure directly in a print that provides convertible movement of dispositions in area of a print and as consequence, reduction of length of beams of dislocation sockets.

摘要:On the basis of the Ag-Pd-Gd, Ag-Ru-Gd and Pd-Ru-Gd ternary systems, the partial phase diagram of Pd-Ag-Ru-Gd(Gd＜25， atom fraction) quaternary system has been studied by means of X-ray diffraction analysis, differential thermal analysis, electron probe microanalysis and optical microscopy.The 700℃ isothermal sections of the Ag-Pd-5Ru-Gd, Ag-Pd-20Ru-Gd and Ag-Pd-50Ru-Gd (Gd≤25，atom fraction) phase diagrams were determined respectively. And the 700℃ isothermal section of the PdAg-Ru-Gd (Gd≤25， atom fraction) quaternary system phase diagram was finally irferred. The section consists of four single-phase regions: solid solution Pd(Ag), (Ru), Pd3Gd and Ag51 Gd14; five two-phase regions: Pd(Ag) + (Ru), Pd(Ag) + Ag51 Gd14 , (Ru) + Ag51 Gd14 , Pd(Ag) + Pd3Gd and (Ru) +Pd3Gd; three three-phase regions: Pd(Ag) + Pd3Gd+ (Ru), Pd(Ag) + Ag51Gd14 + (Ru) and (Ru) +Ag51Gd14 + Pd3Gd; one four-phase region Pd(Ag) + (Ru) + Ag51Gd14 + Pd3Gd. No new quaternary intermetallic phase is found.

摘要:According to the character of gain-frequency characteristic change of electromagnetic response to impact excitation it is possible to trace quality change of components adhesive contact in composite materials and to predict the moment of its destruction.

摘要:In this paper, 1Cr11Ni2W2MoV steel that is aerial engine blade materials was hot dipped Al-6，Si-4，RE in order to improve its application temperature. According to GB/T13303 - 91 standard, samples with coating and without coating were oxidated at 700℃ from 5 h to 600 h. Two oxidation kinetics curves were drawn in terms of data of tests. The results showed that oxidation resistance of 1Cr11Ni2W2MoV steel hot-dipped Al-6， Si-4，RE is better than one without coating. From SEM and EMPA, the surface of coating formed dense and uninterrupted α-Al2O3, which is the bars of oxidation resistance. In addition, according to one crossing point of the two curves, it was suggested that hot dipped aluminum steel should be annealed before used.

摘要:Experimental data indicate that Young's modulus of materials decreases with the decreasing of the grain size. Obviously, the primary factor of this decrease is presence of grain-boundary region, which Young's modulus other than in the bulk of crystallites. There is a set of various expressions for calculation of Young's modulus of polycrystals, obtained under the assumption, that it is possible to consider a polycrystal as a composite consisting of a crystalline matrix and a intercrystalline layers (grain-boundary region). Calculations showed incorrectness of application of a majority of these expressions and a large error in the calculations for the nanocrystalline materials. By us, on the basis of the same assumptions, is also obtained analytical expression for calculating Young's modulus of materials with grain size more than 30 nm, which is more exact, than all others.It is necessary to consider under the calculation of effective Young's modulus nanocrystalline materials with grain size of less than 30nm, that grain-boundary region itself is not uniform. It is reliably established,that the triple joints of grain boundaries have a structure and properties, different from the structure and the properties of grain boundaries, which these joints connect. For nanocrystalline materials the volume fraction of the triple joints in the grain-boundary region can reach 50， and even more. Therefore assumption was made, that the nanocrystalline materials should be represented as consisting of three phases (triple joints,grain boundary between the triple joints and crystallite). On the basis of this idea is obtained analytical expression for calculating of Young's modulus nanocrystalline materials. The analysis shows that Young's modulus calculated by this analytical expression coordinated with the theory and the experiment.

摘要:Cold-rolling workability, heat treatment characteristics and mechanical properties of Mg-5，-22 ， Li-2 ， Zn(mass fraction) wrought alloys were studied. Density of alloys is between 1.19 and 1.62 g/cm3. The limit of reduction for cold rolling of the β phase alloys at 16， and 22，Li exceeds 90， at room temperature. The properties and microstructures of Mg-Li-Zn alloys were studied, which were homogenized, cold rolled, then annealed at different temperatures. Recrystallization behaviors of the alloys were investigated through microstructures observing and hardness measuring. The results show that the cast billets are suitable for rolling after homogenization at 573K for 12 h for Mg-9Li-2Zn-2Ca alloy and at 523K for 24 h for Mg-9Li-2Zn-2Ca alloy. The cold rolled plates were completely recrystallizated by annealing at 573K for 1 h.

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摘要:In order to improve the properties of inert anode of NiFe2O4 spinel, some additive V2O5 was added to raw materials-powders of NiO and Fe2O3. The powders of NiO, Fe2O3 were mixed with slight amount of V2O5, then they are moulded and sintered at 1200℃ for 6h. The sintering mechanism of powders of NiO and Fe2O3 with some additive V2 O5 was researched. The effect of V2O5 on density, electrical conductivity and corrosion resistance of inert anode of NiFe2O4 spinel was studied at the same time. The results show that the sintering mechanism for powders of NiO and Fe2O3 with some additive V2O5 is liquid-phase sintering. Additive V2O5 can increase the density of the samples, especially it improves the corrosion resistance of the samples remarkably. When the amount of V2 O5 is 1.5 ，, the sample's corrosion rate is 1/80 of that of sample without V2 O5. But the electrical conductivity of the samples with V2O5 is lower than that of the sample without V2O5.

摘要:Conditions of gauging of true microhardness of thin ribbons metallic glasses (MG) with the count of their depth are established. For the first time the method of a indentation was approved for an assessment of crack resistance of MG. The behavior of parameterKIc is found in a interval of temperature of viscous-brittle transition down to the beginning of volumetric crystallization of MG. The estimation method of temperature of viscous - brittle transition is offered at the microindentation of annealing ribbon on an elastic substrate.

摘要:The weldments for several types of high Cr ferritic steels were investigated to understand the fracture mechanism of the Type Ⅳ crack. The creep testing shows that the Type Ⅳ cracking is more likely to occur at the lower stress level, whereas at the higher stress level the crack shifts towards parent metal. The microstructures observed in the HAZ for all the materials are mostly tempered lath martensites. There was no δ ferrites found in all creep specimens.

摘要:Lead-lithium alloys are of great interest for practice as the advanced materials to be used in new technique, nuclear energetics, and so forth. Terefore, study on the physico-chemical properties of the latter is of major significance. An analysis of the available literature shows that there are a few works, devoted to study of Pb-Li alloys densities. However, temperature dependence of the density ρ(T), and its temperature coefficientK=dρ/dT for eutectic alloy were obtained by either extrapolation of the density data up to the eutectic alloy's composition, or calculation method. There is a certain discrepancy amounting to as high as 4，, while the allowable error in the density measurements is less than 0.5，. The discrepancy between the results for the temperature coefficients of density amounts to 80，.In this work we present the experimental data on the temperature dependence of Ph0.83 Li0.17 eutectic alloy's density in the temperature range 520K to 643 K. The alloys were prepared using Pb and Li with 99. 999， and 99.8， contents of the basic elements, respectively. We use the improved device, which permits to get the results with error less than 0. 15，. The results of 115 measurements of density in 520K to 643K temperature range were processed by the least-square method. Density polytherm of Pb0.83 Li0. 17 eutectic alloy is described by linear equation ρ(T) =9507.89-0. 79813(T-508) , kg/m3 ,where T is the absolute temperature by K. Mearsurement error was 0. 12， at 95， reliability.Discrepancy in the temperature coefficient data was 1.08，.Thus, the temperature dependence of the Pb-Li eutectic alloy density was studied by the precise two-capillary method. The obtained results may be recommended as the most reliable reference data.

摘要:We have fabricated the large single domain YBaCuO bulk superconductors by using multiseeding technique combined with composition gradient in the precursor. Obviously, the growth time can be shortened by multiseeding method and the weak links between grain boundaries originated from different seeds can be also overcome with introducing the chemical component gradient and arranging the seeds exactly. For these YBCO disks, only single peak occurs in the distributions of trapped field, and the magnetic levitation force is equal to that of the same size sample fabricated with single seed. Although the arrangement of seeds is similar, the distribution of trapped field still shows four peaks for the sample without composition gradient.

摘要:It has been studied connection between composition, structure and properties of powder steels using technology of their own. Nitrogen containing powders were obtained by mechanical allowing (MA) of Fe-Cr and Fe Cr Ni-C mixtures in a high-energy planetary mill in the gaseous nitrogen environment. The contents of nitrogen after MA was 0. 7 ， in Fe-Cr-N and 2.1， in Fe-Cr-Ni-C-N mixes. Phase composition after the mechanical alloying was: in system Fe-Cr-N - solid solution of chrome in iron and α - Fe, in system Fe-Cr-Ni-C-N-40， γ-phase (vol. fraction) , α - Fe and solid solution Cr-Fe.There are investigated physical-mechanical, tribo-technical and specify properties of the nitrous steels,are fixed the base dependences between parameters of process of MA and structure of steels. Introduction of nitrogen by rather new method of MA, as against saturation of melts, allows to run phase composition - to generate structure with more dispersible and uniform nitrides or with the nitrous austenite (depending on purpose of steel).It is demonstrated by means of X-ray diffraction and method of Raman spectrum analysis, that in a sintering process of powder steels, obtained by introduction of carbon in the form of cast-iron powder, a formation of metallofullerite phase Fex C60 at determined conditions. The possibility of fullerenes conception in powder carbon steels, diffusion of iron atoms at fullerite lattice and formation of metallofullerites during contact interaction of fullerene with iron is confirmed experimentally.Dependence of synthesis activity of fullerences from temperature of sintering, type and quantity of alloy elements is determined.

摘要:Fabrication of a strong cube texture Ni substrate through thermomechanical process is reported by ORNL research group. Decreasing the substrate thickness, the engineering critical current density will be improved. Rolled substrates are electropolished to the final thichness of 100, 80, 50, 40, and 20 μm, respectively. Electropolished substrates are recrystallized at temperatures between 800-1000C and in a mixed atmosphere of 4， H2 in 99.99， purity Ar. Orientation mappings of recrystallizated tapes are conducted through an EBSD system mounted on a LEO-1450 SEM. The influence of the substrate thickness on texture of the tape is studied in this paper. Results show that with the decrease of substrate thickness, the texture of the tapes with the same recrystallization process is more and more closed to the exact position of cube orientation.

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摘要:Pure CoO nanoparticles have been synthesized using solvothermal method at 150℃ with Co(CH3COO)2 · 4H2O and anhydrous ethanol as reactants. SEM, TEM and XRD were employed to characterize the size, morphology and crystalline structure of the as-synthesized CoO nanoparti cles. It is revealed that the CoO nanoparticles are of octahedron configuration in face-centered cubic (FCC) structure with a lattice constant of 0. 426 nm and have an average particle size of about 50 nm. Typically, when the concentration of Co(CH3COO)2·4H2O in CH3CH2OH reduces from 0.24 mol/L to 0.08 mol/L, the size of CoO nanoparticles decreases from 500 nm to 50 nm. Based on the results of IR analysis of the finished reaction liquid and XRD of products, the reaction mech anism of the solvothermal system has been discussed.

摘要:The role of structural design of nanosystems, i.e. systems with high density of surfaces, boundaries and interfaces greatly increases as material science rapidly develops in the direction of molecular and atomic assembly technology of materials and constructions. The processes occurring in interface layers determine the unique properties of nanosystems. The evolution of a substance in a boundary layer tends to a stationary state corresponding to external conditions. For micro(nano)-systems interfaces corresponding to a symmetry dictated energy extremum can be selected as states -attractors. To optimize structural design, forecasting and achievement of desirable characteristics, the processes of internal structural self-organization of a system should be in resonance with processes of controlling external influences (synergy resonance principle). This approach, together with earlier developed crystallochemical methods of searching for symmetry preferred interfaces of heteroepitaxy, allows one to carry out modeling generation and experimental selection of nanosystems with desirable properties and purposeful nanodesigning to create new materials, structures and devices. In view these tasks the discussion concentrates on: (1) Processes of special boundary texture formation in order to obtain high stable magnetic properties of permanent magnets on the basis of Sm-Co powders; (2) Processes of structural self-organization and boundary design upon Bi, Bi-Sb nanofilm formation with a big length of electron mean free path; (3) Creation of coherent solid-state heterojunctions of superionic conductor- an electronic conductor in order to conserve fast ionic transport and low activation energy of ion-movement in the crystal layer interface. Formation of such hererojunctions is of the key role in the creation of new types of devices with high frequency capacitance characteristics and a necessary element for the future information technologies, namely, wireless networks of autonomous microsensors and microrobots.

摘要:The microstructure and properties of heavily deformed Cu-Ag-Ce in situ nano-filamentary composite were studied in this paper. As cast, copper matrixes were dendritic and Ag-rich phases, some of which present spheroidizing tendency, were embedded in Cu dentritic arms. After heavily deforming, Agrich phases develop into fibers: the thick fibers with a size of more than 50 nm and the thin ones with a size of less than 30 nm. Strengthening of Cu-Ag-Ce in situ nano-filamentary composite could be divided into two stages and the combination of different strength and conductivity could be obtained through controlling reducing area, intermediate heat treatment and stabilizing treatment. The results revealed that heavily deformed Cu-Ag-Ce in situ nano-filamentary composite had high strength ( ＞ 1.5GPa) and high conductivity(＞65 ，IACS).

摘要:Iron-based products account the main volume of powder metallurgy production. Nevertheless its strength and reliability are not enough in comparison with classical cast materials. So that is why making nanostructural powder materials allows to increase strength and extend the range of products. A principally new way of nanostructure production is possible by means of iron mechanical alloying with nitride-forming and nitrogen both at the same time.Unlike classical technology of internal nitrogenation, nitrogen saturation, in our case, occurs by whole volume at plastic deformation conditions. A review of experimental results of phase forming alloys in the Fe-Ni, Fe-Ni-Cr, Fe-Ni-N, Fe-Ni-Cr-N, Fe-Cr-Ni systems prepared by mechanical alloying are given. The influence of the technological parameters of mechanical alloying, atmosphere of mechanical activation on nitrogen content and phase composition of examined alloys has been studied. Experimental results of the influence of mechanical alloying technological parameters on degree of ammonia dissociation and nitrogen content in examined alloys are presented. Heat treatment influence of mechanically alloyed, nitrogen-containing alloys on theirphase composition and structure are investigated.It was shown that using mechanical alloying, it's possible to prepare high-alloyed iron-based alloys containing more than 1， of nitrogen. It was established that technology of mechanical alloying in ammonia atmosphere allows to prepare austenitic steels with nanocrystalline structure, which affords high value of yield stress. Physico-chemical patterns of interaction between the nitrogen-containing atmosphere and nitride-forming elements under their mutual mechanical activation conditions were established in consequence of theoretical and experimental researches. Some scientific principles of nanocrystalline materials were gained by quantitative description of correlation between the mechanical dose, nitrogen potertial, nitrogen content in alloy and morphology of hardening phase.

摘要:In this paper, conductive antimony-doped tin oxide (ATO) composite particles is prepared by hydroxylation method of metal alcoxides. This method has many advantages such as little pollution, low cost, simple sheet and equipment. The synthesis processing and the ATO nanoparticles are characterized by means of transmission electron microscope (TEM), X-ray diffraction (XRD), thermal gravimetric and differential thermal analysis, and BET. The results show that the ATO nanoparticles is tetragonal rutile crystal structure. TEM show that the particles are monodispersed with weak aggromation. The size of the particles calcinated at 700 is about 8nm. The specific areas are 153 m2 · g-1. In addition to, ATO nanop articles have good electric properties

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摘要:The nanometer yttrium oxides were obtained through precipitation in aqueous solution by reaction with ammonium bicarbonate. The reaction between yttrium chloride and ammonium bicarbonate, the effect of surfactants on particle size and the methods of controlling agglomeration were studied. Compared to other methods, the method of controlling the agglomeration by adding surfactant is one of the best methods for controlling the agglomeration of nanometer particles in wetchemical process. Increasing surfactants in process of precipitation deduced particle size, obtained narrow size distribution of primary particles. As for the concentration range studied, excess surfactants increased the particle size on the contrary. Characteristics of the thermal decomposition of yttrium carbonate were studied. It indicated that the approximate chemical composition of the precipi tate was Y(OH)Clx (CO3)(1-x/2) · 3H2O,the cubic Y2O3 was obtained above 600℃ , the specific surface and the remain chloride of nanometer Y2O3 was decreased with calcinating temperature rising. The spherical nanometer yttrium oxide was gained with primary particles＜50 nm,agglomerate distribution D50 ＜ 150 nm, BET＞ 35 m2/g, agglomerate constant (D50/DBET ) ＜6.

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摘要:Thermal barrier coatings (TBCs) offer the potential to significantly improve efficiencies of aero engines as well as stationary gas turbines for power generation. On internally cooled turbine parts, temperature gradients of the order of 100-150℃ can be achieved. TBCs, typically consisting of an yttrium stabilized zirconia top coat and a metallic bond coat deposited onto a superalloy substrate, are mainly used to extend lifetime. Further efficiency improvements require TBCs being an integral part of the component which requires reliable and predictable TBC performance. TBCs produced by electron beam physical vapor deposition (EbPVD) or plasma spray (PS) deposition are favored for high performance applications. The paper highlights critical R&D needs for advanced TBC systems with a special focus on reduced thermal conductivity and life prediction needs. To further enhance the efficiency of gas turbines, higher temperature and a longer lifetime of the coating are needed for the next generation of TBCs. This paper presents the development of new materials, new deposition technologies, and new concept for application as novel TBCs. This paper summarizes the basic properties of conventional thermal barrier coatings. Based on our own investigation, we reviewed the progress on materials and technologies of novel thermal barrier coatings. Except yttria stabilized zirconia, other materials such as lanthanum zirconate and rare earth oxides are also promising materials for thermal barrier coatings. Nanostructure thermal barrier coating is presented as a new concept. This paper also summarizes the technologies for depositing the thermal barrier coatings.

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摘要:Tackified textile fiber preforms are used widely in resin transfer molding (RTM) to produce aerospace-grade composite parts. In the present study, a new tackifier was developed to improve RTM laminate performance. The influence of tackifier concentration on spring back, thermal properties and mechanical performance was studied . It has showed that the new tackifier was compatible with the matrix resin and improved the textile handling ability; the ILSS was slightly increased without decreasing of thermal properties, modulus and flexural strength.

摘要:Ti-Al based intermetallic alloys are promising for various applications in aerospace and automobile industry. Their favorable properties, such as low density and good corrosion resistance, are accompanied on the other hand by low toughness and very difficult metallurgy. One of the possibilities to improve the toughness of Ti-46Al-5Nb-1W (，, at. fraction) alloy consists in change of their microstructure into lamellar microstructure, which can be reached moreover by directional crystallization. This experiment is described in this paper. Samples of the Ti-46Al-5Nb-1W (，, at. fraction) alloy prepared by plasma and vacuum-induction metallurgy were subjected to directional crystallization. Cooling rates were constant and ranged from 5.56 × 10-6 m/s to 1.18 × 10 -4 m/s. Directional crystallization has been accomplished in ceramic tubes made of corundum-Al2O3. The samples were studied by metallographic and chemical analysis.Lamellar microstructure of the samples was found to consist of α2- and γ-phase lamellas. Moreover, ceramic particles Al2O3 were found to be present in the samples. Distribution of the alloying elements in the samples was homogenous.

摘要:Nanocrystalline powders of yttrium partially stabilized zirconia (YPSZ) are reprocessed into agglomerated feedstocks for plasma spraying thermal barrier coatings (TBCs), using the methods of ball milling, slurry dispersion, spray drying, and heat treatment. Atmospheric plasma is used to spray the agglomerated nanocrystalline particle feedstocks and coatings were deposited on the substrate of Ni-based superalloy. Scanning electron microscopy (SEM) is used to examine the morphology and cross-section of the agglomerated feedstocks and the free-section and cross-section of the nanostructured TBCs. Experimental results show that the agglomerated nanocrystalline particles are spherical and dense. Unlike conventional plasma-sprayed coatings, the micron/nano/micron sandwich structure can be found in the nanostructured YPSZ coatings deposited by atmospheric plasma spraying.

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摘要:The effect of tempering temperature on microstructure and mechanical properties of 23CoNi steel plate has been studied. Tempering in the temperature range of 100-460℃, the ultimate tensile strength σb tends to change along a curve which has the shape of the letter "n", the peak of the σb occurs in the range of 460-475℃, beyond the peak, σb deceasing as the temperature increasing. Tempering in the temperature range of 100-200℃, the impact property αku increases as the temperature goes up. After 200℃, αku goes down as the temperature increases, when the tempering temperature goes higher than 460℃, αku goes up again tempering at higher than 485℃, the acicular alloying carbides M2C precipitate from matrix. The orientation relationship between M2 C and matrix coincides with follows: (011)α//(001)M2c, [100]α//[100] M2c.We found out a new order phase B2 which dispersing in the matrix and the size is very small. This paper discusses the reason of the formation of this new order phase and the sequence of effects to mechanical properties. With the increasing of the tempering temperature, both MaC and new order phase growing up. As the tempering temperature goes beyond 470℃, the amount of retained austenite tends to go up, higher than 510℃, the growing up of reverted austenite is accelerative. It is identified that retained austenite is coming from the reverse transformation. Tempered at higher than 550℃, we can easily find the reversion austenite which contains much more Nickel than matrix does and emerged in the bulk form under TEM.

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摘要:(Pb, Sr)TiO3 (PST) thin film are fabricated by RF magnetron sputtering on Si-buffered Pt/Ti/SiO2/Si substrates with different buffer layer deposition time. Surface morphologies of the buffer layer indicate an improving surface roughness and larger grains with the prolongation of sputtering time. Deposition of PST thin films shows excellent surface fluctuation filling ability to improve the surface roughness of substrates. PST surface morphologies exhibit apparently different grain forms according to the preparation time durance of buffer layer.

摘要:Results of an experimental research into evolution of structure and micro hardness hard magnetic alloy Fe-30Cr-8Co-0.7Ti-0.5V-0.7Si at complex two-level in isothermal conditions on the circuit deposittorsion at various temperatures in single-phase ( are given. It is revealed that deformation results in transformation of coarse-grained structure in fine-grained in all volume of the sample, however the generated structure is non-uniform on section of a sample. In an active zone of deformation near to mobile it is brisk the microcrystalline layer with the size of grains about 5 microns which thickness poorly depends on temperature is formed. In process of removal from an active zone of deformation the size of grains is increased, and micro hardness decreases.

摘要:The application of non-evaporable getters is increasing, they have been widely used in sealed-off vacuum or controlled atmosphere devices. A new type of Ti-based sintered non-evaporable getter has been studied. The room temperature pumping speeds under three activation processes for H2 were measured as a function of sorbed gas quantities in this paper. At the same time, the optimal activation processes were discussed. The results indicate that the getter combines high porosity and large specific surface area which confirm good performances at room temperature. The threshold of activation temperature is about 500 ℃ and optimal pumping speed and pumping capacity can be achieved with activation temperature around 600℃ for 30 min. Besides, different configurations can be available in accordance with requirements.

摘要:Single crystals of ternary W-based alloys with 2 ， Re and less than 7 ， Mo have been grown for the first time at the Baikov Institute of Metallurgy and Materials Science RAS. Plasma arc melting allowed us to effectively purify the single crystals from a number of impurities. According to mass spectrometric analysis for 70 elements, the total content of impurities does not exceed 0. 063，. It was found that, as the Mo content increases, the size of first-kind subgrains decreases and their mutual misorientation increases. In the W-based alloy with 2.3 ， Re and 6.7， Mo, no first-kind subgrains are observed,whereas second-kind subgrains are elongated along the growth direction. In this case, their total misorientation is well below that in the other low-alloy single crystals.Single-crystal of binary tungsten-based alloys with rhenium were prepared by electron-beam zone melting (1， Re, mass fraction) and plasma arc melting (2，Re, 10，Re, 25，Re (mass fraction)). It was found that the low-alloyed (1，-2 ， Rh (mass fraction)) W-based alloys are characterized by a rather perfect single-crystal structure and misorientations of first- and second-kind subgrains of 20-50' and 10-40', respectively. Sections with the coarse-grained structure are observed in ingots of the alloy with 10，and 25， (mass fraction) Rh; in the alloy with 25， Rh, such structure is observed immediately from the seed.A device for measuring the liquidus and solidus temperatures of refractory metallic alloys has been designed. The liquidus temperatures of ternary single crystals (W-Mo-Re) have been measured.The studied single crystals, owing to their purity and high stability of the structure and properties,are widely used in electronics, electrical engineering, and analytical devices for various purposes.

摘要:The paper presents a research the effect of sodium injection rate in a melt containing potassium tantalum fluoride and a flux on morphology and characteristics of tantalum powders obtained by sodium reduction.

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摘要:One of directions of basic researches in the field of chemical process engineerings is making new polymeric materials for electronics and aviation technique distinguished by boosted production characteristics.The value of aromatic polyimides (PI) as industrial thermally sound polymers is well-known. However alongside with a complex of valuable properties they have also series of shortages: high temperatures and difficulty of reaching of 100， conversion at ring formation polyamic acids (PAA) and their instability in time, low stability to hydrolysis, poor adhesion to line of substratums etc. all this in some cases restricts or makes to impossible application PI in practice.The complex examinations, spent by us, the solid-phase of thermal cyclyzation PAA and its model junctions have reduced in an establishment of correlation associations between a degree and velocity of ring-formation, thermal stability and reagent resistance, stregth that has allowed to govern process of deriving PI with a necessary level of production characteristics. Use of some components, for example, heterocyclic basic amines-azoles, promotes acceleration and lowering of a temperature band of ring-formation PAA, and also magnification of a degree of ring-formation, that reduces in a considerable raise thermal and chemical resistance, mechanical and dielectric parameters and insulant properties which are not varying at long-lived operation.The modes of deriving of various materials designed on the basis of industrial PAA of a lacquer consisting in introduction of azoles, plasticizing and adhesion components. It is shown, that the coats obtained from modified polymers, have boosted adhesion, high thermal, mechanical, insulant and other properties maintained in requirements of climatic trials.

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摘要:The relationship between mechanical property and microstructure of NiTi shape memory alloy has been studied. It was founded that with increasing prestrain the memory recovery rate decreased, but the recovery stress and the recovery strain increased first and then decreased. The recovery stress and the recovery strain reached maximum at about 11， prestrain. The TEM(Transmission Electron Microscope) results of the alloy indicated that the microstructures with different prestrain of the alloy had obvious characters. At 9， prestrain, the martensite anamorphosis of the alloy still presented self-cooperation configuration, and some martensites have become thick obvi ously because of tropism. When the prestrain was 11，, the martensite anamorphosis has become completely thick and tropism became consistent. As the prestrain increased to 13，, the microstructures of the alloy have become disordered, the tropism became inconsistent and the interface became blurry.

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摘要:This article explains the definition of pulmonary embolism as well as its causes and elaborates on a new type of inferior vena cava filter(VCF)we have developed. Shaped like a waistdrum,the VCF is mainly made of TiNi shape memory alloy-wire. It has a subulate wire frame which can intercept the thrombus on each side. Its medial body is made up of straight shape memory alloywire . Every pillar is bound by several shape memory alloy springs. This type of inferior vena cava filter has a good resistance to fatigue and is hard to be broken. Through animal experiments its framework has been proved to be lasting. Neither deformation nor fragmentation happened when the VCF had been kept in the body for a long time. The thrombus interception efficiency of our VCF is higher than imported VCFs. The filter is unfavorable for thrombosis. After implantation,the IVC was completely unimpeded and no displacement occurred. Moreover the VCF did little damage to the Wall of vein. Neither IVC perforation nor haematoma occurred after the operation.

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摘要:NiTi shape memory alloy (SMA) stent with film are the long-term implanted medical devices which could be used in human's organ, such as esophagus, bile duct, urethra-prostate and blood vessel, by intervene therapy. It is very important to have a good biocompatibility for implanted device. According to standard ISO 10993, we completed biocompatibility evaluation of NiTi stent that included following tests: cytotoxicity, sensitization, genotoxicity, hemolysis and acute systemic toxicity, The results of tests qualify the NiTi stent, and provide an optimistic conclusion for the eventual use of NiTi stent as implanted medical devices.

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摘要:Electropolishing has been used in TiNi alloy in several fields for its special characteristics, but its essential details and electropolishing mechanism have not been reported yet as a demand from business competition, which, to a great degree, restricts the application and extension of the electropolishing technology. In this paper, effect of temperature on nitinol electropolishing is explored. Studies on the effect of the temperature on the electropolishing process show that the higher the temperature is, the bigger the electropolishing rate is, following a near Gauss law. The relationship between the temperature and surface roughness follows near parabolic law, the relationship between the temperature and surface reflectivity follows near Sigmoidal law.

摘要:The carbon supported PtRu alloy film electrodes having Pt about 0.10 mg/cm2 or even less were prepared by ion beam sputtering method (IBSM). It was valued on the hydrogen analyse performance, the temperature influence factor and the stability by electroanalysis hydrogen analyse method. It was found that the carbon supported PtRu alloy film electrodes had higher hydrogen evolution performance and stability, such as the hydrogen evolution exchange current density (j0) was increase as the temperature (T) rised, and it overrun 150 mA/cm2 as the trough voltage in about 0.68V, and it only had about 2.8， decline in 500 h electrolytic process. The results demonstrated that the carbon supported PtRu alloy film electrodes kept highly catalytic activity and stability, and it were successfully used in pilot plant for producing H2 on electrolysis of H2S.

摘要:Intensive development of gold placer deposits in the South Far East of Russia has produced numerous technogenic placers (concentration dump tailings) that contain fine free and bound gold and the platinum group metals. The secondary processing of these technogenic placers makes it possible to extract the whole set of precious metals from the concentration tailings.The authors have elaborated the low-waste technology of extraction of useful components using the methods of gravitation, magnetic and electromagnetic separation, hydrometallurgy, and extraction. Usually, precious metals are leached with cyanide solutions that significantly deteriorate the ecological situation. Instead of them we propose to use thiocarbamide, thiocyanate, and mixed thiocarbamide and thiocyanate solutions in the process of utilization of the technogenic placers. Introduction of thiocyanate ions into the thiocarbamide leaching solutions increases the indices of gold extraction into a leaching solution. Efficiency of the precious metal extraction into leaching solutions is 94 ，- 96 ，.Our investigations showed that liquid extraction of gold and silver from the leaching solutions permits the precious metals to be extracted with additional separation from admixtures and essential decrease of specific thiocarbamide consumption. Comparatively inexpensive tributyl phosphate and diphenyl thiourea that are manufactured in production quantities, are used as extragents.Utilization of the technogenic placers of Primorye will produce the raw material for repeated extraction of precious metals and will be favorable for the ecological situation in the populous districts of the region where the placers exist.

摘要:Gold nanoparticles protected by organic small molecular compounds or macromolecule have attracted considerable attention and their preparation is one of hotspots in the nano-chemical material field due to their ongoing and potential applications in optics, electronics, catalysts and biosensors. In recent years there are many liquid phase chemistry methods to prepare monodispersed gold particles. Among them, the photochemical method is quite attractive because of its some important advantages for size-controlled synthesis of gold nanoparticles. Therefore, in this paper the recert progress of the photochemical preparing Au nanoparticle materials was briefly introduced and mainly emphasized authors' own works of this area.

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摘要:The cladding preparation technology for the micro contact profile is investigated through the way of seam welding. The effects of the seam welding on different conditions including welding electrical current, welding time, electrode force and electrode material were contrasted through the way of metallographic structure, electron scanning, experiments of rectification and twist fatigue.The parameters of welding several kinds of materials were obtained. As a result, the qualified contact profile can be produced by making a control of the technical conditions: welding current, welding time, electrode force and electrode material.

摘要:In this paper our work on lithium aluminium hydride doping with Ti(OBu)4by mechanical milling was showed. Its thermodynamic and kinetics were enhanced greatly and its reversible hydrogen storage capacity could reach 3. 0， (mass fraction). From the X-ray diffraction (XRD) patterns, we found that a lot of LiAlH4 had been decomposed to Li3AlH6 and Al. The catalyst Ti (OBu)4 couldn't be found after ball-milling, instead TiAl3 appeared. But the locations of Ti atoms are still not determined.

摘要:Hydrogen of no less than 99. 999 ， (vol. fraction) purity is a principal power media of hydrogen power engineering. A single method for the preparation of high purity hydrogen consists in its separation from vapour-gas mixtures via the selective diffusion of hydrogen through a palladium membrane. The rate of hydrogen diffusion and the strength and stability during the operation in aggressive gases are important characteristics of palladium membranes. The increase in the strength, plasticity, and hydrogen-permeability of membrane alloys can be reached by alloying palladium with the formation of solid solutions.The formation of wide ranges of palladium-rare-earth metal (REM) solid solutions is an interesting feature of palladium. Earlier, we have shown that the alloying of Pd with REM substantially increases the rate of hydrogen diffusion and markedly increases the strength of palladium on retention of the adequate plasticity.In this work, we have studied alloys of the Pd-Y and Pd-Y-Me systems. It was shown that the following conditions should be satisfied to prepare high-quality alloys exhibiting high service properties: (1)the use of high-purity components (whose purity is no less than 99.95，, mass fraction), in particular,high-purity Y prepared by vacuum distillation, and (2) holding the reached purity for the final product.For this purpose, we suggested a cycle of manufacturing operations including the preparation of a vacuumtight foil of 50 (m thick as the final stage.The hydrogen-permeability of the alloys was measured at different temperatures and hydrogen pressures. The instability of operation of binary Pd-Y alloys w alloying the composition with a Ⅷ Group metal. For example, the alloy of the optimum composition Pd-8Y-Me in the annealed state exhibits the following mechanical properties: HV= 75 kg/mm2 , σu = 58 kg/mm2 , and δ= 20，. Its hydrogen-permeability (QH2) measured as a function of the temperature exceeds that of the Pd-23Ag alloy (that is widely used by foreign companies) by a factor of 1.5-2; it is 3.6-4.7 m3/m2 hMPa0.5 at 300-600℃, respectively.The alloys exhibiting the high hydrogen-permeability combined with the high mechanical properties shows promise as materials for diffusion hydrogen purification devices whose productivity reaches tens thousands nm3/h.

摘要:The effects of preparation methods, supports and active parts on both the activation and stability of catalyst for the sodium borohydride hydrolysis were studied, and the results showed that the activation and stability of the catalysts prepared by impregnation method is better than that prepared by chemical plating. Compared to exchange resin and activated alumina, the diatomite with high BET surface area and porosity is more suitable for as the catalyst's support. Co is much better than Ni when used as catalytic active part.

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摘要:Three LiCoO2 samples of different specifications were synthesized using different Co3O4 s as starting material, and characterized in physical, electrochemical and safety properties. There demonstrates clear dependence of LiCoO2 on Co3O4 in particle size and density. The main difference among the three LiCoO2 samples lies in physical, rate capability and safety properties, the sample with larger particle size, higher density (accordingly smaller surface area) demonstrates better safety but lower rate capability, while there is little difference among them in terms of capacity and cycling stability despite of the variation in physical properties.

摘要:Spherical nickel hydroxide is used as the active material of the positive electrode in alkaline recharged batteries,it determines the most important properties of the battery. Spherical nickel hydroxide made in China meets less than half of total demand of the Chinese batteries industry.Most of the spherical nickel hydroxide used for high performance MH/Ni batteries is imported because the Chinese one cannot reach the requirements of "fine crystal grain, high density and highactivity". In this thesis, the spherical nickel hydroxide with fine crystal grain high-density and high-activity was prepared with complexation-precipitation method. The effects of the preparation conditions on the electrochemical activity of the products were investigated by means of orthogonal test, comprehensive range analysis on all the used factors. And theirs levels showed that the optimum process parameters of preparation the fine crystal grain high-density and high- activity spherical nickel hydroxide is specified as reaction temperature 60℃, pH value 11.0, stronger stirring intensity, the mole ratio of ammonia and nickel 0.3,desiccation temperature 100℃. Furthermore,the relative influence degree of those technology factors is stirring intensity> pH value> reaction temperature>desiccation temperature>mole ratio of ammonia and nickel. The spherical nickel hydroxide made at those optimum process parameters is characterized as with high bulk density(1.78g/cm3), larger specific surface(11.9 m2/g), higher discharged specific capacity (281 mAh/g), and fine crystal grain (15.8 nm). The full width of half maximum intensity(FWHM) of XRD patterns of samples in (101) lines can reach as high as 0. 983. All of these merits make it completely meet the requirements of spherical nickel hydroxide used for high performance MH/Ni batteries.

摘要:Lithium iron phosphate is a most promising cathode material for Li-ion batteries(LIB).But the key barrier limiting its application is extremely low electronic conductivity. Meanwhile the low electron conductivity can be improved by preparing LiFePO4 with carbon modified. LiFePO4/C was synthesized by high temperature solid-state reaction using iron (Ⅱ) oxalate, ammonium di-hydrogen phosphate and lithium carbonate with a kind of organic compound (CR) that can be dissolved in the dispersant (ethanol) as carbon sources added to the synthetic precursor in this paper.The samples were characterized by X-ray diffraction, scanning electron microscope observations,charge/discharge test, cyclic voltammetry and carbon analysis. It was believed that the synthesized LiFePO4/C with perfect olivine structure by X-ray diffraction. The carbon brought about two advantages: (i) an optimized particle size of LiFePO4, and (ii) increasing the electronic conductivity and Li+ diffusivity. The cathode material could demonstrate a charge/discharge flat voltage of 3.4V (Vs Li+/Li). Especially the active material with 20， organic added according to the final product of LiFePO4 showed very good electrochemical performance reaching about initial 162.0 mAh/g specific capacity at 0. 1C rate and could also keep excellent discharge capacity even at 3C rate (510 mA/g) current and good cycle performance. The carbon content in the final production was only 5.29，(mass fraction).

摘要:An O2-type layered LiNi0. 5 Mn0. 5 O2 was prepared by rapidly-quenched method, and the structural feature was studied by X-Ray Diffraction. The material synthesized at 950℃ was with a single O2-type structure. Charge and discharge in a voltage range of 2.0-4.35V, the discharge specific capacity of material at the 1st cycle is 143.1 mAh/g in a current density of 0.5 mA/cm2 , and the plot of discharge was with two voltage plat at 3.6 V and 2.8V.

摘要:Thin film microbattery is a promising micropower source for its high energy density and good cell performances, and the application of fast lithium ion conducting solids as electrolytes is thus very important. (Li0.5 La0.5 )TiO3 (LLTO) thin film electrolytes for thin film microbattery were prepared onto Pt/Si substrates using magnetron sputtering. As-deposited LLTO thin films showed amorphous-like phases and when deposition temperature increases the ionic conductivity raises accordingly. The ionic conductivity of LLTO thin film reaches 8. 7 × 10-6 S/cm when the deposition temperature is 400℃, which shows that the LLTO thin films deposited by magnetron sputtering are suitable for application as an electrolyte for thin film microbattery.

摘要:The structural characteristics, preparation methods and electrochemical properties of LixMnO2 were introduced in this paper, and many problems of the research status of LixMnO2 at present were pointet out, meanwhile the developmental direction of layered LixMnO2 in the future was put forward.

摘要:One new preparation method of Well-property LiCoO2, which is synthesized by caclining a good precursor obtained from aqueous solution at lower temperature for shorter time, is studied in this paper. The experimental results indicate that LiCoO2 is pure phase layer structure with high crystallization, and excellent electrochemical properties are also proved owing to its initial charge and discharge specific capacity of 205mAh/g , 169mAh/g at the current of 0.2C respectivly.

摘要:Discharge property is an important factor to evaluate electrode materials. The discharge capacity of the hydrogen-storing alloys are not only influenced by its thermodynamic property but also closely related to its dynamic property. When the temperature changes, the degrees of influence of the above-mentioned two factors on the discharge performance vary accordingly. As a consequence, adjusting compositions of the alloys to make them have good discharge performance under a relatively wide range of temperature is of great significance. On the basis of great deal of experimental investigation, the optimum combination of rare earth elements in hydrogen-storing electrode materials using at-30-55℃ is determined and the relationships between the cell parameters and discharge performance of alloys at -30℃ are discussed. Additionally, the DFEC calculation method has been improved to predict the discharge capacities, which is in good agreement with the experimental ones. This is of theoretical significance in investigating new hydrogen-storing alloys of the AB5 type.

摘要:The LiSiPON electrolyte films were prepared by magnetron sputtering method with different N2working pressure. The structure, morphology, composition and the relationship between ionic conductivity and N content were studied in detail. The result showed that N content in the films depended on N2partial pressure. With the N2 partial pressure increasing, N content increased firstly and gained a maximum values then decreased. N content in the LiSiPON films affected the ionic conductivity of the films.The ionic conductivity of the films increased with the N content increasing, and could reach a maximum value 10. 4× 10-6S/cm.

摘要:A procedure of Ni, Cr, Mn, Co, and Mo (Me) transfer onto iron substrate in ionic-electronic melts LiCl-Li, CaCl2-Ca, and BaCl2-Ba was elaborated and the transport processes were studied. The saturated vapor pressure of these ionic-electronic melts is as low as enabled working at atmosphere pressure in an inert media up to 1000 ℃.Armco iron was used as a substrate because it practically does not interact with lithium, calcium, and barium. The metals-diffusants were put into the melts in the form of a powder. The complete saturation of the melts with lithium, calcium, and barium was ensured by a preceding contact of a molten salt with an excess of Li, Ca, or Ba before loading of iron.The reactions take place despite the metals and iron were separated from each other by the molten salt. The quantity of the metals transfered was determined by the change in mass before and after experiments, by microprobe analysis, and x-raying of the iron surface layer. The experiments were carried out at 900, 950 and 1000℃ during 5, 10, 15 and 20 hours.At the first stage of the process the formation of the ionic-electronic melt occurs. For example, dissolution of calcium in the case of the system CaCl2-Ca is mainly proceeded in the form of one-valent cations: Ca + Ca2+()Ca+. As soon as the metal-diffusance is immersed into the melt, its dissolution in the form of negative ions takes place: Me + Ca+() Me-+ Ca2+. In the vicinity of the iron substrate the last equilibrium will shift to the left generating a solid solution or intermetallide. The thickness of the diffusion layer rises as the temperature and saturation time increase. The obtained coverings were 20-60 (m thick,and their surface layer contained 15，-80， (mass fraction) of the metal-diffusance.Both the composition of the melt and the procedure of the coverings preparation in ionic-electronic melts have been patented (Patent RU2058422, 1996, pr. 30.09.93).

摘要:Many efforts were spent on the homogenization of microstructure and property of welding joints. A new surface nanocrystallization technique named Supersonic Particles Bombarding(SSPB) can be used for this purpose. Two kinds of pressure vessel steel welding joints, 16MnR and 0Cr18Ni9Ti, were chosen to be treated by SSPB. Transmission electron microscopy was introduced to examine the surface microstructure. And their ability to resist H2 S stress corrosion was enhanced significantly after the SSPB treatment. The mechanism for the results were analyzed as well.

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摘要:The ultimate methods for solving the contamination of Cr6+ is to replace the Cr electroplating with other techniques, thermal spray provides one of the best choices among those alternative techniques. The influence of coatings upon the fatigue performance of substrate, however,should be labeled as an important factor at some high level applications. The effects of both coatings manufactured by HVOF and Cr electroplating respectively on the fatigue performance of substrate are investigated in this article. These results show that the fatigue limit strength at P= 50 ，of thermal spray coating is 750 MPa in comparing with fatigue limit 726 MPa for substrate, and the fatigue life increase 25，- 150， when comparing with fatigue life of substrate at different stress levels. The fatigue life increases in the stress scope of 750-850 MPa even the area of thermal spray coating is subtracted. Cr eleetroplating coating reduces the fatigue life by 70，- 95， and the fatigue limit is only 600 MPa. Fracture analysis reveals that the main fracture is initiated at the subsurface, which is 0.2-0.5 mm away from substrate surface. The analysis also observes that the crack in the Cr electroplating propagates through the interface and finally into the substrate which hastens the formation of crack origin and the extension of crack in the substrate, however, the crack in the thermal spray coating deflects at the interface, spreads along the interface, as a result,the crack forming in the coatings has no negative influence on the main crack initiator and crack extension in the substrate.

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摘要:Highly cube textured Ni tapes are produced by heavy cold rolling and recrystallization annealing. The textured nickel tapes have been proven to be suitable substrates for YBCO superconducting tape. Nevertheless, rolling damage and grain boundary grooves on Ni influence the epitaxial growth of highly textured buffer and YBCO layers. The polishing of the Ni substrate surface may play a crucial role in making it beneficial to epitaxial film deposition. In our work, several polishing methods were adopted on Ni to reduce the depth of rolling damage and grain boundary grooves. On the polished Ni substrates, textured Y2O3 buffer layers were deposited using RF sputtering. XRD results show that in-plane texture of Y2O3 films will minish with the decreasing of the Ni substrate surface roughness. AFM results show that average grain size of the Y2O3 film is biggest and surface is coarse in film on flatter Ni surface.

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摘要:SnO2 film is widely used as a gas sensor, whereas, its gas sensitivity at low temperature is not satisfactory. Surface modification is an effective way to enhance sensitivity of SnO2 which is closely related to the surface morphology and microstructure of SnO2. In this paper, nickel nanoparticles surface-modified SnO2 films were prepared by D. C. magnetron sputtering. The effects of distribution and morphology of Ni particles on the surface of SnO2 on hydrogen sensitivity were studied. The results show that the sputtering time of Ni influences gas sensitivity of SnO2. With increasing the annealing temperature, Ni particles separate from SnO2 particles and gradually aggregate into spherical particles distributing uniformly on the surface of SnO2 film. The particle size, porosity, and specific surface area of Ni influence the gas sensitivity of SnO2 directly. Gas sensitivity examination indicates that the spherical Ni particles in a diameter of 100nm lead to the best modification. After heat treated at 800℃ for 3 hours, SnO2 film with 30s sputtering of Ni shows a gas sensitivity of 112， for 4000 ppm H2 at a operating temperature of 60℃.

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摘要:The weak interface bonding of metal matrix reinforced by carbon fibers is the central problem of fabricating such composites. Depositing copper coating on carbon fibers is regarded as a feasible method to solve the problem. In this paper, copper coating has been deposited on the fibers through both electroless deposition and electroplating methods. Two kinds of complexing agents and two stabilizing agents are taken during the electroless plating process. The solution is stable, and little extraneous component is absorbed on the surface. After adding additive agents and increasing the concentration of H2SO4 to the acid cupric sulfate electrolyte, the "black core" during usual electroplating process is avoided. The quality of copper coating is analyzed using SEM and XRD, etc.

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摘要:In this paper, the transparent hard diamond-like carbon (DLC) films were deposited on glass substrate by magnetic confined radio-frequency plasma chemical vapor deposition. The structure of films was studied by Raman spectra and X-ray photoelectron spectra (XPS), the transmittance of films by Spectrophotometer. The mechanism of the influence of films structure on transmittance of the films was discussed. The results show that the thickness of films was lower than 100nm, and the transmittance was over 90， in 380-780 nm region. Discussion in theory on the influence of film structure on transmittance was correspondence to experiment results.

摘要:Oxide ceramic was sprayed via high-energy plasma spray using MCrAlY manufactured with special technique as bond coating and oxide ceramic as top coating in this article. Investigation showed that the dense and highly adhesive coating could be obtained with optimized technique. After grinding and polishing, coating roughness was lower than 0. 2μm, which could meet the requirements of lift roller. After one year serv ice, molten Tin could not adhere to the ceramic coating,well it greatly alleviated its corrosion to the roller , kept the surface of oxide ceramic coating smooth and the improve the quality of glass due to the strengthened lift roll.

摘要:Surface composite up to 3.0 mm in thickness with compact microstructure was fabricated successfully via vacuum infiltration casting technique on the bronze substrate under the optimum experimental conditions: the vacuum degree of -0.08 MPa, pouring temperature of 1220℃, grain size of 0. 20-0. 24 mm, preheating temperature of 180℃. The preform was mainly composed of graphite particles and binder NJB (self-fabricated binder). The vacuum degree, pouring temperature, preheating temperature and grain size during infiltration casting play an important role on the process of forming the surface composite. The results show that three cases are obtained in the vacuum infiltration casting technique: no infiltration, partial infiltration and full infiltration. The main reason of no infiltration is that the vacuum degree is not enough so that the force acting on the liquid metal is lower than the resistance due to the surface tension and the pouring temperature is somewhat low. Partial infiltration is because of somewhat lower vacuum degree and pouring temperature. Full desired infiltration is on account of suitable infiltration casting conditions, such as vacuum degree, pouring temperature, grain size and preheating temperature. The influencing effect of vacuum degree is most obvious for the formation of surface composite, then pouring temperature and particle size. The infiltration mechanism is discussed on the bases of the different processing conditions.

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摘要:The influences of the thermomechanical processing, including the solidification conditions, the cold deformation and the intermediate annealing treatment, on the structure and properties of the Cu-10Ag alloy in situ composite were studied in this paper. The cast structure and the structural changes in the cold deformation and intermediate annealing process were observed. The properties including the ultimate tensile strength (UTS) and the electrical conductivity were determined. A two-stage strain strengthening effect for the Cu-10Ag alloy in situ filamentary composite was observed. The factors influencing the UTS and conductivity were discussed. The solidification conditions in the range of 10-1000 K/s cooling rates and the intermediate heat treatment showed obviously influence on the structure and properties on the Cu-10Ag alloy in situ filamentary composite. The typical properties of the Cu-Ag alloy in situ filamentary composites through thermomechanical processing were reported.

摘要:Electrostimulated deformation of metals and alloys, using groove or smooth rolling, requires that several important conditions are satisfied. (1) The deformation site must geometrically overlap with the flow of electric current passing through a strip between the rolls; (2) The density of direct or alternating electric current supplied to deformation site must be sufficiently high (of an order of 104-106A/cm2 ); (3) An efficient heat removal from the deformation site must be achieved. In general, the temperature of a strip must be within the range of 100-300℃. (4) The electric resistance at the roll-strip interface must be minimized. Our recent studies also indicate that the electrostimulated rolling in the shortcut regime is a further condition for obtaining high quality rolling of metals. In this regime, the rolls are placed in physical contact even in the absence of a strip that ensures an uninterrupted passage of electric current between the rolls.Provided that the aforementioned conditions are met, the plastic rolling deformation of various metals and lloys, including the most refractory and deformation resistant ones such as tungsten, molybdenum,their allows with rhenium, becomes possible. A single pass through the rolls is usually sufficient to deform a strip by about 50，- 70， as is the case for tungsten. Significantly, the temperature in the deformation site does not exceed 150-200℃.In our opinion, excellent results for electrostimulated rolling obtained by us are related to new previously unknown behavior of metals and alloys, being subject to pressure treatment and rolling.

摘要:In the study, the common copper powder is used as sample, the ultrafine copper powder is researched by a new process of high energy ball milling. The influence of the milling time, the milling intensity, the milling medium, the ratio of hall to material, the dry milling and the wet milling on copper powder size are studied and the rule of every factors influencing properties of copper particle size and specific surface area under the best experimental conditions are acquired. By the regressive analysis of experimental results under the best conditions, the characteristic equation of copper particle prepared by high energy milling is confirmed.

摘要:In the given work results of researches asymmetric rolling on reversive mill 5000 are considered.By definition of boundary modes of asymmetry and an opportunity of application results of precomputations are resulted in production for various circuits of rolling. Results of influence of asymmetric rolling on physic and mechanical properties, structure and geometry hot sheets are shown, recommendations to introduction of modes of asymmetry in a production cycle of manufacturing of sheet-rolling production of the improved quality are developed

摘要:X70 grade large diameter line pipe with helical and longitudinal seam SAW was developed and used in West-East Pipeline Project of Petrochina. The operation pressure of the pipeline was designed as 10 MPa, with diameter of 1016 mm OD. This project represents the first high-pressure, large diameter and high strength grade gas pipeline in China. All the factors affecting the safety of the pipeline shall be considered. The welds quality of line pipe is very important for safety of the pipeline. Acicular ferrite type X70 grade pipeline steel was adopted for the base material. The welds performances of X70 line pipes with 1016mm OD and 14.6-21.0 mm WT has reached a very high level, especially of low temperature Charpy V impact toughness of welds metal. Welding technique and quality status of X70 line pipe of China are investigated in this paper.

摘要:The reachings in the field of deriving modern materials of a microelectronics engineering are especially effective, when the process engineering of manufacture of the concrete device allows maximum to realize the resources, included in active structure.In the report the outcomes of results on a considerable diminution of thermal restrictions generating impatt diodes millimeter (mm) wave band are submitted with the purpose of improving exit pupils and reliability. The complex of original design technological receptions has allowed to solve a problem of making multimesa wave band structures, in which the thermal resistance is possible to reduce in inverse proportion√n,where n-number of mesa structures. The sectional process engineering has general purpose character and is applicable to the most composite materials in particular to heterostrucructures and all types of made on their bases microwaves diodes containing a mesa structure. The results are illustrated on silicon double drift six mesa structure 5 mm wave band for which the level of an output continuous power 1.04watts on frequency 65.9 GH2 is obtained. Thus p-n junction temperature did not exceed 220℃ usual copper heatsink also was utillized. The electronic snapshots and outcomes of investigation of thermal fields silicon mesa diodes of a various configuration are reduced: to six mesa, eight mesa, ring.Singularity of a sectional process engineering are higher specific mechanical loadings at assembly of devices, therefore with the purpose of a raise of reliability and percent of an exit of suitable devices designed and the procedure permitting to inspect on starting plates amplitude and a strain gradient in active region is tested X-ray diffraction method that is especially important for heterostructure mesa diodes.

摘要:Ultrafine grain WC a lloys were prepared by high energy ball milling and subsequent spark plasma sintering from elemental mixed powders of nominal composition of WC-6Co-1.5Al(，, mass fraction). The influences of spark plasma sintering parameters on the density, hardness, bend strength and microstructure of sintered WC alloys were also investigated. The results show that there existed a proper time combination of pulse current and constant current employed for sintering. When the peak, base, frequency and occupational ratio of pulse current, constant current, total sintering time and sintering pressure were chosen as 3000 A, 360 A, 50 Hz, 50，, 1500 A, 6 min and 30 MPa, respectively, the optimal sintering was a combination application of 1min pulse-current and subsequent 5 min constant-current. The density, hardness and bend strength of the as sintered alloys could get up to 14. 224 g/cm3 , HRA94 and 1660 MPa, respectively, and the average grain size of WC was only about 500 nm.

摘要:Sorbents are widely used in purification of various liquids and gases, offering a universal means for wastewater and air cleaning. The most promising sorbents are those obtained from agrowaste products such as rice or buckwheat husk. Processing of husk in cold plasma modifies the composition, structure and surface properties of the raw material and raises its porosity, thus substantially improving the sorption properties of the final product.Husk as a raw material for producing sorbents has the following advantageous properties: (1) appropriate chemical composition; (2) low cost; (3) high dispersity, due to which there is no need in any special treatment of the material prior to its exposing to plasma; (4) scaly structure and developed porous surface ensuring a high surface-to-volume ratio. The best properties are displayed by the sorbents obtained in cold plasma under reduced pressures of 53.2 Pa. The raw naterial traverses the region occupied by the plasma and, as it does so, it gets heated up to a temperature of 250 - 350 ℃. The whole process involves two stages: combustion of the raw material and modification of its properties under the action of the plasma. The combustion proceeds due to the oxygen contained in the starting material. During the combustion, the hydrogen contained in the starting material and some part of the carbon also burn out.The resultant scaly sorbent is accumulated in a cooler. The scales are black; they range in sizes from 1mm to 5 mm.The sorbents obtained are remarkable for their useful properties and outperform most of the traditional sorbents used in modern industry. The starting materials are inexpensive, and their resources are almost unlimited. The sorbents have rather a low production cost (1.8-2.5($)/kg). The sorbents can be used for cleaning hydrosphere from water pollutants on a large scale. The degree of cleaning water surface from oil products with sorbents was a subject of investigation. The highest degree of purification the sewages up to 96.6， was observed in those cases where sorbents obtained from rice and buckwheat husk were used. Another advantageous feature of the sorbents stems from the practical good that can be benefited from their utilization. The sorbents saturated with pollutants can be used as fuel or in producing asphalt concrete. The sorbents may prove useful in pharmaceutical and food industries. Most advantageous conditions for producing such sorbents are available in rice-growing countries such as China, India, Japan and Korea.

摘要:In order to improve deficiencies of NiFe2O4 spinel used as matrix of inert anode in aluminium electrolysis, NiFe2O4/SiCp were prepared by the solid state reaction for the first time. Microstructural changes were observed by scanning electronic microscope and phase was determined with X-ray detector. Effect of sintering temperature and times on density, porosity and microstructure were researched, and the reasons that caused the difference were discussed deeply. At the same time the thermodynamical compatibility of NiFe2O4 and SiC was proved under 1200℃ by DTA.The results showed that the microstructure was more homogeneous when the sintering temperature reached 1 180℃and the density attained their maximum about 6 h sintering. The appropriate sintering technique of NiFe2 O4/SiCw composite materials was 1180℃× 6 h.

摘要:Consideration was given to some peculiarities of the resource-saving IDT-production that implements metallophysical principles of hot deformation effect upon the formation of martensite and perlite structures of alloy steels as well as upon their functional properties by way of DTT-cycling.

摘要:Under the conditions of tetramethyl ammonia chloride (TMAC) used as starting material, Ti-based Dimensionally Stable Anode (DSA), stainless steel used as cathode and Nafion 900 cation membrane as cell diaphragm, this paper studies the synthesis of tetramethyl ammonium hydroxide (TMAH) by cell diaphragm electrolytic method, examining not only the effects of current density, concentration of starting material and cell temperature, on the product purity and current efficiency, but also the effects of electrolyte circulation rate on the service life of Ti-based DSA.The experiment puts forward an optimum processing condition, and experimental findings show that preparing TMAH by using this technique can obtain a current efficiency 74.7 ， and get product with a purity greater than 99.9，.

摘要:Growing demand for fluorinating reagents to be used in rare-metal industry has stimulated conducting research in the field of production for these reagents. That is why the fluorinating reagents production has recently formed an independent segment of industry. Main industrial fluorinating reagents include hydrofluoric acid, anhydrous hydrogen fluoride, technical ammonium hydrodifluoride, fluorosilicic acid and its salts. To produce technical etching acid, fluor-spar with calcium fluoride content at least 92， is used in most cases. To produce anhydrous hydrogen fluoride, fluor-spar with calcium fluoride content 96 ，-97 ， is necessary. The fluorine-containing raw materials refinement from silica by means of flotation makes the fluorinating reagents production substantially more expensive. In this work we have attempted to process unconcentrated raw materials by fluorine removal in the form of volatile silicon tetrafluoride. In this process silicon tetrafluoride was recovered by liquid ammonia with subsequent hydrolysis of the formed ammonia hexafluorosilicate. Hydrolysis occurred according to the reaction:(NH4)2 SiF6 + 4NH3 + 2 H2O= 6NH4F+ SiO2 The products of the ammonia hexafluorosilicate hydrolysis included ammonia fluoride and amorphous silica gel ("white soot") as by-product. This "white soot" was of high purity-with main component content 99.95， and total admixture content 0.05，. Silica gel is a superfine material with specific surface of 267.6 m2/g and is recommended as filler in the production of rubber, plastics and for other applications.Ammonia fluoride was transformed into ammonia hydrodifluoride (main processing product) according to the reaction:2NH4F→NH3+NH4 HF2 It was stated that the NH4F: NH4 HF2 ratio depends on boiling point temperature-with its increase the ammonia hydrofluoride concentration in solution increases as well.

摘要:In the paper, the rough surface of KFC copper strip applied to lead frame was studied and analyzed. Themethod of energy spectrum analysis, SEM and metallographic analysis are adopted to study and analyze. To compare the component of the rough surface of KFC copper strip with one of the normal copper strip, the component abnormity is not found. But to observe its microstructure of the rough surface, there are thinner and regular dimpling in the surface before the polishing, and bigger crystal grains are found after the polishing. The coarse structure vanished when the sample is heated higher than 700℃.It is shown that current annealing technique is not reasonable and should be improved and optimized.

摘要:A study is presented concerning a cold plasma technique for improving the bondability of highstrength high-modulus multi-filament polyethylene fibers to polymer matrices and the fibers impregnation with the objective to fabricate composite materials (CMs). Strong bonding between the matrixes and reinforcing fibers during the production of composites appears in the case if interaction is chemical. The value of the activation energy of the chemical interaction for very high performance polyethylene fiber was estimated. It was 1.14 eV. This allows using the cold plasma technique for producing CMs. In order to understand the effect of cold plasma treatment treated and untreated fibers were used to fabricate CMs. The strong bond between the matrix and plasma-activated fibers affects both the properties and failure mode of composite. The properties and failure modes were compared to those of CMs reinforced with untreated fibers. After plasma treatment the properties of CMs are increased. CMs are broken as a unit whole under tension. The ideas of the activating the fibers by cold plasma treatment above the activation energy of the chemical interaction may be extended over other types of the fibers and matrices to produce new types of fiber-reinforced composite materials with high physicomechanical indices.

摘要:Boehmite powders with various particle sizes have been prepared by hydrothermal method and the α-Al2 O3 powders yielded after subsequent calcination have been studied. Dispersive crystalline boehmite powders of 30-100 nm, 0.4-0. 6μm and 1μm in size were obtained respectively by changing the hydrothermal precursors and the pH value of hydrothermal slurry. Calcination of boehmite powders of 30-100 nm at 1250℃ for 1h resulted in the formation of single-phase α-Al2O3,and the products consisted of vermicular particles. The boehmite powders of 0.4-0.6μm were also fully converted to α-Al2O3 at 1250℃, and the products consisted of plate-like particles with the same size of 0. 4-0. 6μm. The boehmite powders of 1μm calcined at 1350℃ for 2h were still composed of a little proportions of transition aluminas besides α-Al2 O3, and the particles sintered severely. The reaction processes for the formation of crystalline boehmites under hydrothermal conditions and α-Al2O3 powders during calcination have been discussed.

摘要:As a result of research into the cold rolling theory and practice, a complex of mathematical models and model-based process solutions has been elaborated to improve quality of cold rolled steel strips and reduce energy consumption. The use of the above designs made it possible to establish a number of new regularities and employ them for cold rolling practice improvement and cold-rolled strip quality upgrading.

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摘要:The process of the neck spinning of oblique tubes is simulated by means of the 3D elastic-plastic finite element software, MSC. MARC. The dynamic boundary and contact problems in simulation are solved. The characteristics of the metal flowing, the distributions of the stress and strain, the possible defects and areas during spinning are obtained. The influence of the nominal reduction of the blank radius per path on the metal flowing and deformation is also researched theoretically and experimentally. It shows that the nominal reduction of the blank radius per path has great influence on the neck spinning process of oblique tubes. A reasonable nominal reduction of the blank radius per path is very important to guarantee the proceeding of the spinning process and to obtain a sound products.

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摘要:Under reduction atmosphere, a blue sky rare earth silicate light storage and emission material was prepared by high temperature solid phase synthesis. The best constituent ratio of this material was determined through orthogonal experiment, and its excitation and emission spectra and X-ray diffraction patterns were measured. And a comparative study was conducted on its application properties.

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摘要:A new process of cryolite preparation is studied in this work by selecting a proper system of reaction and weeding impurity technology. The quality of artifial cryolite reaches and exceeds the first level of national standard. The utilization efficient of fluoride-containing acid slag is above 99.5，. It brings considerable economic benefit, and the environment is improved.

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摘要:The heat-treated temperature and preservative time influence on oxide resistance of SrAl2O4 :Eu2+ ,Dy3+ in high temperature atmosphere were studied in this paper. The result showed that oxide resistance was improved obviously by phosphor particles coated SiO2. The reason for the coating to craze above 900℃ was also analyzed.

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摘要:Rare earth oxide doped molybdenum powders were prepared by the reduction of rare earth nitrites doped MoO3. The effect of rare earth oxide on the reduction behavior of molybdenum oxide had been studied by means of Temperature Programmed Reduction (TPR), thermal analysis, X-ray diffraction. Doping rare earth oxide in the powder could lower the reduction temperature of molybdenum oxide and decrease the particle size of molybdenum. The mechanism for the effects had been discussed in this paper.

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摘要:Taking a copper anode slime as the raw material, a novel process for selenium extraction was studied. The primary selenium recovery can reach above 88.5 ， and the quality index of selenium product can be up to 99.5 ，. The economic benefit resulted is remarkable and environment has been protected.

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摘要:2205 duplex stainless steel (DSS) possesses favorable mechanical property and good corrosion resistance at the same time, and has been a new material and applied widely in petroleum,natural gas, ocean and chemistry industry etc from 1980's in some advanced countries and from 1990's in China. One natural gas headstream project possesses abundant natural gas and provides 80， of total quantity gas for West-East Pipeline Project. The project includes a 13 km length pipeline and a gas treatment plant that purify gas about 12 × 109 m3 every year. The Cl- concentration in the water separated from gas is about 10，, and so the corrosion of medium is very violent to the pipeline. 2205 DSS material has been applied successfully to the project in 2004. This is the first time of such a mass of DSS material application in a project in China. The characteristic of 2205 DSS and application in natural gas pipeline project has been introduced in this paper.

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摘要:Method of Miniaturized Disk Bend Test (MDBT) originally designed for the tests of irradiated materials is a convenient technique for monitoring the degradation of mechanical properties of structural materials operating in extreme conditions. A small size of specimens (disks with 3 mm in diameter and 0.1-0.3 mm in thickness) as well as possibility to use the standard equipments for tension and/or pressure tests allow minimizing the financial charge for application of this method in practice and enable to keep up in the real time with (watch on) the changes of materials mechanical properties induced by the effect of unfavorable environment. Wide application of MDBT or other methods for miniaturized specimen tests does possible to inspect on the fly the changes of strength and ductility of the materials, and, of the expense of it, to prevent an alert conditions caused by the materials degradation, for instance, catastrophic embrittlement.In the paper, methodical aspects of MDBT technique application for estimation of structural materials mechanical properties have been considered. By the example of own results and literature data, the possibilities of MDBT method are demonstrated as well as the correlation of obtained from this technique parameters with the standard mechanical properties such as strength, yield stress and ductility of metals.

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