Structural effect of Zr substitution in the Sm2Co17 phase

被引：20
|
作者：
Lefevre, A
CohenAdad, MT
Mentzen, BF
机构：
[1] UNIV LYON 1,GRP PHYS CHIM MINERALE 2,LAB PHYSICOCHIM MAT LUMINESCENTS,UMR 5620,F-69622 VILLEURBANNE,FRANCE
[2] UNIV LYON 1,LAB MULTIMAT & INTERFACES,UMR 5615,F-69622 VILLEURBANNE,FRANCE
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1997年 / 256卷 / 1-2期
关键词：
Co-rich samarium compounds; Zr substitution; structure determination; preferred site occupation; permanent magnet material;
D O I：
10.1016/S0925-8388(96)03023-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the Sm-Co-Zr system, a hexagonal Sm2Co17 structure is observed in the isothermal section at 1150 degrees C. Recent investigations have shown that only rhombohedral Sm2Co17 is stable in the Sm-Co binary system. X-ray patterns of samples annealed up to 1325 degrees C were indexed with the 2/17 R structure. The hexagonal structure is not a disordered form of the rhombohedral Sm2Co17 phase. It is obtained by deformation of the SmCo5 structure through the disordered SmCo7 structure. In this work, the crystal structure of this (Sm+Zr)(2)Co-17 compound has been determined and its stabilisation is discussed. (C) 1997 Elsevier Science S.A.
引用
收藏
页码：207 / 212
页数：6
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