Phase transformations and coercivity in rare-earth permanent magnets

被引：17
|
作者：
Menushenkov, VP [1 ]
机构：
[1] Moscow State Inst Steel & Alloys Technol Univ, Moscow 119049, Russia
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷
关键词：
SmCo5; Nd2Fe14B sintered magnets; heat treatment; phase transformation; coercivity;
D O I：
10.1016/j.jmmm.2004.11.421
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hypothetic Sm-Co and Nd-Fe phase diagrams are compared. The phase transformations, which may cause boundaries modification of the SmCo5 and Nd2Fe14B phases, are considered. The phase transformation-induced coercivity mechanism in both Sm-Co and Nd-Fe-B sintered magnets are suggested. It is supposed that formation of coherent epitaxial layers at the surface of grains of the principal phase decreases the number of defect sites for nucleation of reversal magnetization domains and increases the coercive force. © 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：1274 / 1277
页数：4
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