Phase diagram of R-Fe-Co pseudoternary system withR≤33.3 %(mole fraction, R=Sm0.5Dy0.5)|WANG Bo-wen(王博文), LIU Wei-li(刘炜丽),FENG Wen-jiang（封文江）,JIN Guang（金光）,HAO Yan-ming（郝延明）<-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 12 No. 5 October 2002

Phase diagram of R-Fe-Co pseudoternary system withR≤33.3 %(mole fraction, R=Sm_0.5Dy_0.5)

WANG Bo-wen(王博文)^{1, 2, 3}, LIU Wei-li(刘炜丽)²,
FENG Wen-jiang（封文江）²,JIN Guang（金光）²,
HAO Yan-ming（郝延明）<

（1. School of Electrical Engineering, Hebei University of Technology,
Tianjin 300130, China;
2. Department of Materials Science and Engineering,
Shenyang Institute of Technology, Shenyang 110015, China;
3. International Center for Materials Physics, the Chinese Academy of Sciences, Shenyang 110015, China）

Abstract: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 1073K and a vertical section of RFe₂-RCo₂ 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, Th₂Ni₁₇-type and Th₂Zn₁₇-type (Sm, Dy)₂(Fe, Co)₁₇. The (Sm, Dy)₆(Fe, Co)₂₃ phase dissolves 36% Co(mole fraction) at 1073K. However, the (Sm, Dy)₂(Fe, Co)₇ phase in R₂(Fe_1-xCo_x)₇ alloys dissolves about 19% Fe(mole fraction) at 1073K.

Key words: rare earth-iron-cobalt; phase diagram; structure; compounds

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW