CeO2-Y2O3-ZrO2热障涂层研究进展

Research Progress on CeO2-Y2O3-ZrO2 Thermal Barrier Coatings

摘要:

随着先进航空发动机涡轮叶片热障涂层服役温度、服役寿命和隔热性能等要求的不断提升，传统的6%—8%Y₂O₃部分稳定ZrO₂(YSZ)热障涂层由于存在容易产生高温相变、变形剥落等问题，已难以适应未来高温等更加严苛的工作环境。CeO₂和Y₂O₃共同稳定的ZrO₂(CYSZ)涂层具有良好的高温相稳定性、较好的抗熔盐腐蚀性能，CeO₂的掺杂能使ZrO₂材料的热导率降低，提高涂层的隔热性能、热膨胀系数和抗热震性能。综述了国内外CYSZ热障涂层的研究成果和存在的问题，阐述了CeO₂掺杂对YSZ热障涂层性能的影响机制，并简要介绍了目前国内外CYSZ热障涂层及其材料的制备技术研究进展。

Abstract:

With the increasing requirements of service temperature， service life and thermal insulation performance of thermal barrier coatings for advanced aero-engine turbine blades， the traditional 6%—8% Y₂O₃ partially stabilized ZrO₂（YSZ） thermal barrier coatings are difficult to adapt to the more severe working environment such as high temperature in the future due to the problems of high temperature phase transition， deformation and flaking， etc. The CeO₂ and Y₂O₃ co-stabilized ZrO₂（CYSZ） coating has good high-temperature phase stability， better resistance to molten salt corrosion， and the doping of CeO₂ can reduce the thermal conductivity of ZrO₂ material and improve the thermal insulation performance， thermal expansion coefficient and thermal shock resistance of the coating. The research results and problems of at home and broad CYSZ thermal barrier coatings are reviewed， the mechanism of the influence of CeO₂ doping on the performance of CYSZ thermal barrier coatings is described， and the current research progress of the preparation technology of domestic and foreign CYSZ thermal barrier coatings and their materials is briefly introduced.