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
收藏
页码：1 / 5
页数：5
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