Strategy for high-coercivity Nd-Fe-B magnets

被引：551
|
作者：
Hono, K. [1 ]
Sepehri-Amin, H. [1 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
SCRIPTA MATERIALIA | 2012年 / 67卷 / 06期
关键词：
Nd-Fe-B magnets; Permanet magnets; Coercivity; Atom probe tomography; NUCLEATION CONTROLLED MAGNETS; MAGNETIZATION REVERSAL; MICROSTRUCTURE; GA; BOUNDARY; TEXTURE; POWDERS; MEMORY; SIZE;
D O I：
10.1016/j.scriptamat.2012.06.038
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation of continuous thin layers of a Nd-rich amorphous phase surrounding Nd2Fe14B grains is the key microstructural feature of high-coercivity Nd-Fe-B magnets. Contrary to popular belief, a quantitative 3D atom probe investigation suggests that the thin grain boundary phase is ferromagnetic in both sintered and hydrogen disproportionation desorption recombination magnets. Model experiments using Nd-Fe-B thin films indicate that the intrinsic coercivity of mu H-0(c) = 3 T with improved temperature dependence is achievable by magnetically isolating Nd2Fe14B grains of similar to 100 nm. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：530 / 535
页数：6
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