Macroscopic demagnetization of the sintered Nd-Fe-B magnets prepared by Tb grain boundary diffusion

被引：0
|
作者：
Di, Jinghui [1 ,2 ]
Liu, Huiqiang [2 ]
Meng, Hui [3 ]
Chen, Christina H. [4 ]
Zou, Min [5 ]
Wu, Xiongfei [2 ]
Yu, Chao [1 ]
Zhang, Chaoyue [6 ]
Jia, Shengli [2 ]
Wei, Qifeng [3 ]
Zhang, Baoguo [6 ]
机构：
[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China
[2] Hangzhou Magmax Technol Co Ltd, Hangzhou 311500, Peoples R China
[3] Zhejiang Strong Pharmaceut Co Ltd, Hangzhou 311500, Peoples R China
[4] Quadrant Solut Inc, San Jose, CA 95131 USA
[5] Lab Magnet Inc, San Jose, CA 95131 USA
[6] Hangzhou Kede Magnet Components Co Ltd, Hangzhou 311500, Peoples R China
来源：
SCRIPTA MATERIALIA | 2024年 / 247卷
基金：
中国国家自然科学基金;
关键词：
Sintered Nd-Fe-B magnets; Grain boundary diffusion; Macroscopic demagnetization; Magnetization reversal; Magnetic field distribution analysis; MAGNETIZATION REVERSAL; PERMANENT-MAGNETS;
D O I：
10.1016/j.scriptamat.2024.116113
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Macroscopic demagnetization in sintered Nd-Fe-B magnets by Tb grain boundary diffusion (GBD) is investigated in comparison with non-GBD ones. Demagnetization curves, the coercivity distributions, Tb content, and magnetic fields of the magnets at various external fields (mu 0Hext) are analyzed. As mu 0Hext approaches coercivity of the GBD magnet, S-N poles form near the center, between and parallel to the original N-S poles, indicating the magnetization reversal near the center of the GBD magnet. This is distinguished from the non-GBD magnets where demagnetization occurs mainly in the pole surfaces. The mechanism for macroscopic demagnetization is discussed.
引用
收藏
页数：5
相关论文
共 50 条
  • [31] Effect of the grain boundary Tb/Dy diffused microstructure on the magnetic properties of sintered Nd-Fe-B magnets
    Li, Weidong
    Yang, Lijing
    Zhang, Qingke
    Xu, Cheng
    Zhu, Qihang
    Song, Zhenlun
    Zheng, Bizhang
    Hu, Fangqin
    Jiang, Jianjun
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2020, 502
  • [32] Effect of aluminum on microstructure and magnetic properties of sintered Nd-Fe-B magnets processed by grain boundary diffusion of Tb-Al
    Tinghui Wang
    Zhaokun Ma
    Qihang Zhu
    Lijing Yang
    Baosheng Liu
    Yu Zhao
    Cheng Xu
    Bizhang Zheng
    Fangqin Hu
    Jianzhong Li
    Qingfang Huang
    Zhenlun Song
    [J]. Journal of Rare Earths, 2023, 41 (05) : 705 - 712
  • [33] Coercivity and thermal stability enhancement of Nd-Fe-B sintered magnets by grain boundary diffusion with Tb-Al-Cu alloys
    Lee, Dong Hyun
    Kim, Seong Chan
    Kim, Jaehyuk
    Baek, Ju-Young
    Kim, Jong Tae
    Kim, Sumin
    Kim, Donghwan
    Lee, Sang Hyub
    Do, Dalhyun
    Kim, Dong Hwan
    Roh, Jong Wook
    Kim, Jeongmin
    [J]. MATERIALIA, 2024, 36
  • [34] New grain boundary diffusion strategy of Nd-Fe-B sintered magnets to achieve breakthroughs in Tb-availability and thick limitation
    Wang, Zhanjia
    Li, Yuqing
    Wu, Haihui
    Ji, Ming
    Zhang, Hongguo
    Liu, Weiqiang
    Yue, Ming
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 943
  • [35] Coercivity saturation in Nd-Fe-B sintered magnets treated by grain boundary diffusion process of Tb-Ni-Al alloy
    Itakura, Masaru
    Kontani, Hiroki
    Akamine, Hiroshi
    Fujimura, Kazumasa
    Iriyama, Takahiko
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2024, 591
  • [36] Effect of aluminum on microstructure and magnetic properties of sintered Nd-Fe-B magnets processed by grain boundary diffusion of Tb-Al*
    Wang, Tinghui
    Ma, Zhaokun
    Zhu, Qihang
    Yang, Lijing
    Liu, Baosheng
    Zhao, Yu
    Xu, Cheng
    Zheng, Bizhang
    Hu, Fangqin
    Li, Jianzhong
    Huang, Qingfang
    Song, Zhenlun
    [J]. JOURNAL OF RARE EARTHS, 2023, 41 (05) : 705 - 712
  • [37] Modeling of Nd-Oxide Grain Boundary Phases in Nd-Fe-B Sintered Magnets
    G. Hrkac
    K. Butler
    T. G. Woodcock
    L. Saharan
    T. Schrefl
    O. Gutfleisch
    [J]. JOM, 2014, 66 : 1138 - 1143
  • [38] Modeling of Nd-Oxide Grain Boundary Phases in Nd-Fe-B Sintered Magnets
    Hrkac, G.
    Butler, K.
    Woodcock, T. G.
    Saharan, L.
    Schrefl, T.
    Gutfleisch, O.
    [J]. JOM, 2014, 66 (07) : 1138 - 1143
  • [39] Grain growth kinetics in sintered Nd-Fe-B magnets
    Rodewald, W
    Wall, B
    Fernengel, W
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 1997, 33 (05) : 3841 - 3843
  • [40] Structure and chemical compositions of the grain boundary phase in Nd-Fe-B sintered magnets
    Sasaki, T. T.
    Ohkubo, T.
    Hono, K.
    [J]. ACTA MATERIALIA, 2016, 115 : 269 - 277
12345