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
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
相关论文
共 50 条
  • [41] Effects of hot pressing temperature on the alignment and phase composition of hot-deformed nanocrystalline Nd-Fe-B magnets
    Jing, Zheng
    Guo, Zhaohui
    He, Younian
    Li, Mengyu
    Zhang, Meiling
    Zhu, Minggang
    Li, Wei
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2019, 488
  • [42] Coercivity improvement of hot-deformed Nd-Fe-B magnets by stress-induced Pr-Cu eutectic diffusion
    Wang, Zexuan
    Zhang, Jijun
    Wang, Jinzhi
    Ju, Jinyun
    Chen, Renjie
    Tang, Xu
    Yin, Wenzong
    Lee, Don
    Yan, Aru
    ACTA MATERIALIA, 2018, 156 : 136 - 145
  • [43] Grain-Boundary Structures and Evolution in an Nd-Fe-B Sintered Magnet
    Li, Anhua
    Li, Yanru
    Feng, Haibo
    Li, Wei
    IEEE TRANSACTIONS ON MAGNETICS, 2025, 61 (04)
  • [44] Effect of metallic Nd on the decomposition behavior of Nd6(Fe,Co)13Ga phase in hot-deformed Nd-Fe-B magnet
    Zhang, Tieqiao
    Xing, Wandong
    Chen, Fugang
    Zhang, Lanting
    Yu, Rong
    INTERMETALLICS, 2022, 145
  • [45] Magnetic properties improvement of hot-deformed Nd-Fe-B permanent magnets by Pr-Cu eutectic pre-diffusion process
    Song, Tingting
    Tang, Xu
    Yin, Wenzong
    Ju, Jingyun
    Wang, Zexuan
    Liu, Qiaobo
    Tang, Yang
    Chen, Renjie
    Yan, Aru
    ACTA MATERIALIA, 2019, 174 : 332 - 341
  • [46] High-coercivity ultrafine-grained anisotropic Nd-Fe-B magnets processed by hot deformation and the Nd-Cu grain boundary diffusion process
    Sepehri-Amin, H.
    Ohkubo, T.
    Nagashima, S.
    Yano, M.
    Shoji, T.
    Kato, A.
    Schrefl, T.
    Hono, K.
    ACTA MATERIALIA, 2013, 61 (17) : 6622 - 6634
  • [47] Dependence of the demagnetization behavior on the direction of grain boundary diffusion in sintered Nd-Fe-B magnets
    Chen, Fugang
    Zhang, Tieqiao
    Zhang, Wenhao
    Zhang, Lanting
    Jin, Yunxue
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2018, 465 : 392 - 398
  • [48] Anisotropy of grain boundary diffusion in sintered Nd-Fe-B magnet
    Niu, E.
    Chen, Zhi-An
    Ye, Xuan-Zhang
    Zhu, Wei
    Chen, Guo-An
    Zhao, Yu-Gang
    Zhang, Jin
    Rao, Xiao-Lei
    Hu, Bo-Ping
    Wang, Zhen-Xi
    APPLIED PHYSICS LETTERS, 2014, 104 (26)
  • [49] Effect of WC addition on mechanical properties of hot-deformed Nd-Fe-B magnets
    Zheng, Xiaofen
    Li, Ming
    Jin, Chaoxiang
    Chen, Renjie
    Yin, Wenzong
    Tang, Xu
    Lei, Fang
    Wang, Zexuan
    Ju, Jinyun
    Lee, Don
    Yan, Aru
    JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 728 : 607 - 611
  • [50] Homogeneous transformation of the grain boundary phase and Tb grain boundary diffusion optimization in sintered Nd-Fe-B magnet
    Zhong, Shuwei
    Yang, Munan
    Luo, Sangeng
    Chen, Tong
    Rehman, Sajjad Ur
    Yang, Liuyimei
    Li, Jiajie
    Zou, Zhenggang
    Ma, Qiang
    Yang, Bin
    INTERMETALLICS, 2022, 144