摘要
为了研究稀土永磁材料(Sm,Dy)-Fe-Co系合金800℃等温截面图,配制并熔炼了39个不同成分的(Sm,Dy)-Fe-Co系合金样品,将这些样品在均匀化温度加热并保温20天后,淬入水中。然后,采用金相显微镜、X射线衍射方法,对39个样品逐一进行分析:认定了各样品在800℃的显微组织、化合物物相以及各化合物所占比例,从而确定了Fe-Co-R(R=Sm0.5Dy0.5,R≤33.3at.%)赝三元系800℃等温截面图,并对该截面存在的各金属间化合物进行了分析。结果表明,该截面由9个单相区、14个两相区和6个三相区组成;该截面共存在有7个金属间化合物:(Sm,Dy)(Fe,Co)2,(Sm,Dy)(Fe,Co)3,(Sm,Dy)2(Fe,Co)7,(Sm,Dy)6(Fe,Co)23,(Sm,Dy)(Fe,Co)5,Th2Ni17型的(Sm,Dy)2(Fe,Co)17,Th2Zn17型的(Sm,Dy)2(Fe,Co)17。
To research the isothermal section of the R-Fe-Co pseudoternary system with R≤33.3 at. % （R= Sm0.5 Dy0.5 ） at 800℃, different component 39 samples of R-Fe-Co alloy series were prepared and melted. After these samples were annealed for 20 days, they were launched into water. Then, the microstructure, compound composition and compound quantity of these samples were analyzed by using optical microscopy, X-ray diffraction analysis. Result shows that the isothermal section contains 9 single-phase regions, 14 two-phase regions and 6 three-phase regions; and the isothermal section contains 7 intermetallic compounds： （Sm,Dy）（Fe,Co）2, （Sm,Dy）（Fe,Co）3, （Sm, Dy）2（Fe,Co）7, （Sm, Dy）6（Fe,Co）23, （Sm, Dy）（Fe,Co）5, Th2Nil7 typological （Sm,Dy）2 （Fe, Co）17, Th2Zn17 typological （Sm, Dy）2（Fe,Co）17.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2009年第2期178-181,共4页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(50371205)
关键词
稀土-Fe-Co
相图
等温截面
金属间化合物
rare earth-iron-cobalt
phase diagram
isothermal section
intermetallic compound
