雾化法制备铁基非晶软磁合金粉末的研究?

Study on preparation of atomized Fe-based amorphous soft magnetic alloy powder

摘要:

采用改良的水雾化法和传统的气雾化法,制备 Fe76 Si9 B10 P5铁基非晶软磁合金粉末.通过激光粒度仪、扫描电子显微镜、X射线衍射仪、高温差热仪及振动样品磁强计等仪器,研究合金粉末的粒径分布、组织相结构、热变温度及磁性能.结果表明：两种方法所制备的粉末成分均匀,均呈现出非晶结构的特征,非晶相含量分别为88，和91，,且非晶稳定性好；水雾化粉末分散且呈规则的球形或椭球形,粒径为10.72μm,优于气雾化粉末；两种非晶软磁粉末的饱和磁化强度接近,但水雾化粉末的矫顽力更低,只有0.61 kA/m,表明改良的水雾化法所制备的 Fe76 Si9 B10 P5软磁合金粉末的性能比气雾化粉末的更优.

Abstract:

Fe-based amorphous soft magnetic alloy powder Fe76 Si9 B10 P5 (at.，)were prepared by modified water atomization and traditional gas atomization.The particle size distribution,phase structure,thermal transition temperature and magnetic properties of the alloy powder were investigated by laser particle size analyzer,scanning electron microscopy,X-ray diffraction,high temperature differential calorimeter and vibrating sample magnetometer,respectively.The results show that both powder’s composition exhibits uniformity and shows characteristic of an amorphous structure.The amorphous phase content is 88， and 9 1， respectively and the stability of amorphous is fine.Wherein the water atomized powder is better than the gas atomized powder,which the forward particle size finer,as 10.72 μm,powders are dispersed and regular spherical or ellipsoidal.Both saturation magnetization of amorphous soft magnetic powder is comparable,but the coercivity of water atomized powder is lower which 0.6 1 kA/m only,which indicates Fe76 Si9 B10 P5 soft magnetic alloy powder prepared by modified water atomization is superior to the gas atomized.