Anisotropic behavior of grain boundary diffusion in hot-deformed Nd-Fe-B magnet

被引：53

作者：

Zhang, Tieqiao ^{[1
]}

Chen, Fugang ^{[1
]}

Zheng, Yan ^{[1
]}

Wen, Hongyuan ^{[1
]}

Zhang, Lanting ^{[1
,2
,3
]}

Zhou, Ligang ^{[4
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Hirano Inst Mat Innovat, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Mat Genome Initiat Ctr, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

[4] Shanghai Jiao Tong Univ, Anal & Testing Ctr, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

来源：

SCRIPTA MATERIALIA | 2017年 / 129卷

基金：

中国国家自然科学基金;

关键词：

Nd-Fe-B; Coercivity; Grain boundary; Anisotropic diffusion; Microstructure; COERCIVITY ENHANCEMENT; MICROSTRUCTURE; PHASE;

D O I：

10.1016/j.scriptamat.2016.10.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Grain boundary diffusion process using Nd70Cu30, was applied to the c-plane and ab-plane of hot-deformed Nd-Fe-B magnet. The coercivity was increased from 138 T to 2.44 and 2.20 T for the ab-plane and c-plane diffused specimens, respectively. The corresponding diffusion depth characterized by Cu content in the magnet was about 4.5 and 2.3 mm for the two specimens. Hierarchical coupling between "river-like" Nd-rich phase on the powder flake surface in micron-scale with the diffusion channels at the grain boundaries and triple junctions of the matrix grains in nano-scale is the fundamental cause of the anisotropic grain boundary diffusion behavior. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1 / 5

页数：5

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