摘要
Phase equilibria of the R-Fe-Co pseudoternary system with R≤33.3%(mole fraction, R=Sm 0.5Dy 0.5) were determined in an isothermal section at 1 073 K and a vertical section of RFe 2-RCo 2 by using OM, X-ray diffractometer, EPMA DTA techniques. There are seven intermetallic phases: (Sm, Dy)(Fe, Co) 2, (Sm, Dy)(Fe, Co) 3, (Sm, Dy) 6(Fe, Co) 23, (Sm, Dy) 2(Fe, Co) 7, (Sm, Dy)(Fe, Co) 5, Th 2Ni 17-type and Th 2Zn 17-type (Sm, Dy) 2(Fe, Co) 17. The (Sm, Dy) 6(Fe, Co) 23 phase dissolves 36% Co(mole fraction) at 1 073 K. However, the (Sm, Dy) 2(Fe, Co) 7 phase in R 2(Fe 1-xCo x) 7 alloys dissolves about 19% Fe(mole fraction) at 1 073 K.
Phase equilibria of the R-Fe-Co pseudoternary system with R≤33.3%(mole fraction, R=Sm 0.5Dy 0.5) were determined in an isothermal section at 1 073 K and a vertical section of RFe 2-RCo 2 by using OM, X-ray diffractometer, EPMA DTA techniques. There are seven intermetallic phases: (Sm, Dy)(Fe, Co) 2, (Sm, Dy)(Fe, Co) 3, (Sm, Dy) 6(Fe, Co) 23, (Sm, Dy) 2(Fe, Co) 7, (Sm, Dy)(Fe, Co) 5, Th 2Ni 17-type and Th 2Zn 17-type (Sm, Dy) 2(Fe, Co) 17. The (Sm, Dy) 6(Fe, Co) 23 phase dissolves 36% Co(mole fraction) at 1 073 K. However, the (Sm, Dy) 2(Fe, Co) 7 phase in R 2(Fe 1-xCo x) 7 alloys dissolves about 19% Fe(mole fraction) at 1 073 K.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2002年第5期850-853,共4页
Transactions of Nonferrous Metals Society of China
基金
Project( 5 98710 30 )supportedbytheNationalNaturalScienceFoundationofChina,project( 5 0 10 2 7)supportedbytheNaturalScienceFoundationofHebeiProvince,ChinaandprojectsupportedbyEducationCommissionofHebeiProvince
关键词
磁铁
稀土铁钴
相图
结构
混合物
rare earth-iron-cobalt
phase diagram
structure
compounds
