A Comparative Study of Diffusion Sources for Improved Magnetic Properties of NdFeB Magnets

被引:0
作者
Yu, Xi [1 ]
Luo, Sangen [1 ,4 ]
Shen, Shengwu [1 ,4 ]
Yang, Honglong [1 ,4 ]
Yang, Munan [1 ,2 ,3 ,5 ]
Zhong, Shuwei [1 ,4 ]
Yang, Bin [1 ]
机构
[1] Jiangxi Univ Sci & Technol, Coll Rare Earths, Ganzhou 341000, Peoples R China
[2] Natl Rare Earth Funct Mat Innovat Ctr, Ganzhou 341000, Peoples R China
[3] Guorui Sci Innovat Rare Earth Funct Mat Co Ltd, Ganzhou 341000, Peoples R China
[4] Jiangxi Univ Sci & Technol, Jiangxi Key Lab Met Magnet Mat & Devices, Ganzhou 341000, Peoples R China
[5] Minist Educ, Key Lab Dev & Applicat Ion Rare Earth Resources, Ganzhou 341000, Peoples R China
基金
中国国家自然科学基金;
关键词
Sintered NdFeB; Grain boundary diffusion; Fluoride; Rare earth alloys; Composite diffusion source; B SINTERED MAGNETS; COERCIVITY ENHANCEMENT; MICROSTRUCTURE; BEHAVIOR; POWDER; AL; CO;
D O I
10.1007/s10948-025-06925-8
中图分类号
O59 [应用物理学];
学科分类号
摘要
This study focuses on sintered NdFeB magnets and systematically examines the diffusion behavior and its impact on magnetic properties using three types of diffusion sources: DyF3 powder, a mixed powder of DyF3 and Pr70Co15Al15 alloy, and Pr60Dy10Co15Al15 alloy powder. The findings demonstrate that the Pr60Dy10Co15Al15 alloy diffusion source produces the most favorable outcomes, with an enhancement in coercivity by 6.9 kOe. The composite diffusion source demonstrates a 5.83-kOe increase, while the fluoride diffusion source exhibits the least improvement, with a 4.21-kOe increase. The diffusion of DyF3 is constrained by its high decomposition temperature and interference from F elements, which limit the depth of diffusion of Dy. The composite diffusion source, through the liquid-phase diffusion of Pr70Co15Al15 alloy, has the effect of improving the wettability of grain boundaries and the channels of diffusion, which significantly increases the depth of diffusion of Dy elements. In the Pr60Dy10Co15Al15 alloy diffusion source, the synergistic diffusion of Dy, Pr, and Al elements enhances diffusion efficiency. Moreover, extending the diffusion time allows for further optimization of the grain boundary structure, thus facilitating deeper diffusion of Dy elements. This study thus demonstrates the superiority of the Pr60Dy10Co15Al15 alloy diffusion source, providing a crucial foundation for the efficient use of rare earth resources and the development of high-performance magnets.
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页数:10
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共 29 条
[1]   Effect of rare earth content on TbF3 diffusion in sintered Nd-Fe-B magnets by electrophoretic deposition [J].
Cao, Xuejing ;
Chen, Ling ;
Guo, Shuai ;
Fan, Fengchun ;
Chen, Renjie ;
Yan, Aru .
SCRIPTA MATERIALIA, 2017, 131 :24-28
[2]   Strategy and mechanism for substantially enhanced coercivity in multi-main-phase Nd-La-Ce-Fe-B sintered magnets [J].
Chen, Hao ;
Li, Yuqing ;
Zhang, Hongguo ;
Liu, Weiqiang ;
Wang, Zhanjia ;
Yue, Ming .
ACTA MATERIALIA, 2023, 261
[3]   Coercivity enhancement in sintered Nd-Fe-B magnets by large mass rotating diffusion with Tb strips [J].
Gao, J. Y. ;
Liu, W. Q. ;
Yue, M. ;
Wei, Q. F. ;
Zhang, B. G. ;
Zhan, L. C. ;
Jia, S. L. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2020, 504
[4]   NdFeB Permanent Magnet Uses, Projected Growth Rates and Nd Plus Dy Demands across End-Use Sectors through 2050: A Review [J].
Heim II, James W. ;
Wal, Randy L. Vander .
MINERALS, 2023, 13 (10)
[5]   Application of TbF3 3 Nano-powders by sand milling process in preparing high performance grain boundary diffusion Nd-Fe-B magnets [J].
Ji, Ming ;
Liu, Weiqiang ;
Wang, Zhanjia ;
Fan, Min ;
Wu, Haihui ;
Du, Ruihua ;
Li, Yuqing ;
Zhang, Dongtao ;
Song, Jie ;
Wang, Gang ;
Yi, Xiaofei ;
Liu, Youhao ;
Zha, Shanshun ;
Yue, Ming .
MATERIALS TODAY COMMUNICATIONS, 2024, 41
[6]   Coercivity and microstructure of sintered Nd-Fe-B magnets diffused with Pr-Co, Pr-Al, and Pr-Co-Al alloys [J].
Jin, Lei ;
Jin, Zhe-Huan ;
Zhu, Jin-Hao ;
Ding, Guang-Fei ;
Zheng, Bo ;
Guo, Shuai ;
Chen, Ren-Jie ;
Yan, A-Ru ;
Liu, Xin-Cai .
CHINESE PHYSICS B, 2021, 30 (02)
[7]   Simultaneous application of Dy-X (X = F or H) powder doping and dip-coating processes to Nd-Fe-B sintered magnets [J].
Kim, Tae-Hoon ;
Lee, Seong-Rae ;
Kim, Hyo-Jun ;
Lee, Min-Woo ;
Jang, Tae-Suk .
ACTA MATERIALIA, 2015, 93 :95-104
[8]   Magnetic and microstructural modification of the Nd-Fe-B sintered magnet by mixed DyF3/DyHx powder doping [J].
Kim, Tae-Hoon ;
Lee, Seong-Rae ;
Kim, Hyo-Jun ;
Lee, Min-Woo ;
Jang, Tae-Suk .
JOURNAL OF APPLIED PHYSICS, 2014, 115 (17)
[9]   Most frequently asked questions about the coercivity of Nd-Fe-B permanent magnets [J].
Li, Jiangnan ;
Sepehri-Amin, Hossein ;
Sasaki, Taisuke ;
Ohkubo, Tadakatsu ;
Hono, Kazuhiro .
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2021, 22 (01) :386-403
[10]   Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy [J].
Liang, Liwei ;
Wang, Haifeng ;
Liu, Renhui ;
Ma, Pengfei .
AIP ADVANCES, 2023, 13 (10)