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

被引：2

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

页数：5

共 50 条

[31] Dependence of magnetic performance on coating method in grain boundary diffusion processed Nd-Fe-B sintered magnets [J].

Kim, Jaehyuk ;

Jang, Ye Ryeong ;

Lee, Dong Hyun ;

Kim, Seong Chan ;

Beak, Ju-Young ;

Kim, Donghwan ;

Lee, Sang Hyub ;

Kim, Sumin ;

Roh, Jong Wook ;

Lee, Wooyoung ;

Do, Dalhyun ;

Kim, Dong Hwan ;

Kim, Jeongmin .

MATERIALS TODAY COMMUNICATIONS, 2024, 38

[32] Highly efficient Tb-utilization in sintered Nd-Fe-B magnets by Al aided TbH2 grain boundary diffusion [J].

Di, Jinghui ;

Ding, Guangfei ;

Tang, Xu ;

Yang, Xiao ;

Guo, Shuai ;

Chen, Renjie ;

Yan, Aru .

SCRIPTA MATERIALIA, 2018, 155 :50-53

[33] Enhanced Coercivity and Tb Distribution Optimization of Sintered Nd-Fe-B Magnets by TbF3 Grain Boundary Diffusion Facilitated by Ga [J].

Wang, Ling ;

Li, Wenjiao ;

Wang, Xiaopeng ;

Deng, Zejun ;

Gao, Shujuan .

MOLECULES, 2025, 30 (03)

[34] Recent progress of grain boundary diffusion process of Nd-Fe-B magnets [J].

Chen, Fugang .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2020, 514

[35] Effect of intergranular phase proportion in sintered Nd-Fe-B magnets on subsequent grain boundary diffusion using Tb-Cu alloy [J].

Xie, Yuheng ;

Cao, Shuai ;

Cao, Xuejing ;

Wu, Tengfei ;

Kou, Mingpeng ;

Jia, Zhi ;

Ding, Guangfei ;

Guo, Shuai ;

Chen, Renjie ;

Liu, Xincai ;

Yan, Aru ;

Xu, Zhiyi .

JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 931

[36] Coercivity, microstructure, and thermal stability of sintered Nd-Fe-B magnets by grain boundary diffusion with TbH3 nanoparticles [J].

Liu, Wei-Qiang ;

Chang, Cheng ;

Yue, Ming ;

Yang, Jing-Shan ;

Zhang, Dong-Tao ;

Zhang, Jiu-Xing ;

Liu, Yan-Qin .

RARE METALS, 2017, 36 (09) :718-722

[37] Understanding the coercivity enhancement mechanism of grain boundary diffused Nd-Fe-B magnets by comparing with commercial equivalent coercivity magnets [J].

Wu, Haihui ;

Li, Yuqing ;

Liu, Weiqiang ;

Wang, Zhanjia ;

Qin, Yuan ;

Ji, Ming ;

Du, Ruihua ;

Zhang, Dongtao ;

Zhang, Lele ;

Yue, Ming ;

Yi, Xiaofei ;

Liu, Youhao ;

Zha, Shanshun .

MATERIALS CHARACTERIZATION, 2024, 210

[38] Magnetic properties and Tb diffusion of sintered Nd-Fe-B magnets by suspension plasma spraying [J].

Zhao, Pengxiang ;

Bai, Yu ;

Ma, Wen ;

Li, Duoduo ;

Wang, Yu ;

Lou, Shupu ;

Wang, Qiang .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2022, 557

[39] Investigation on the grain boundary diffusion of Dy2O3 film prepared by electrophoretic deposition for sintered Nd-Fe-B magnets [J].

Guan, Y. W. ;

Huang, Y. L. ;

Rao, Q. ;

Li, W. ;

Hou, Y. H. ;

Luo, J. M. ;

Pang, Z. S. ;

Mao, H. Y. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 857

[40] Enhancing the grain boundary diffusion efficiency of Tb for Nd-Fe-B magnets using dual-alloy diffusion source [J].

Song, Wenyue ;

He, Jiayi ;

Yu, Zhigao ;

Cao, Jiali ;

Liao, Xuefeng ;

Fan, Wenbing ;

Yu, Hongya ;

Mao, Huayun ;

Mao, Congyao ;

Liu, Zhongwu .

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2022, 18 :841-851

← 1 2 3 4 5 →