Microstructure and coercivity modification of HDDR (Pr, Nd, Ce)-Fe-B magnetic powders by grain boundary diffusion with Pr-Fe-Al-Ga

被引：4
作者：
Yang, Xintong [1 ]
Cao, Shuai [1 ]
Kou, Mingpeng [1 ,2 ]
Jia, Zhi [1 ,2 ]
Ding, Guangfei [1 ,2 ]
Yin, Wenzong [1 ,2 ]
Chen, Renjie [1 ,2 ]
Yan, Aru [1 ,2 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CISRI & NIMTE Joint Innovat Ctr Rare Earth Permane, Ningbo 315201, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 341卷
关键词：
Nd-Fe-B; HDDR; Grain boundaries; Diffusion; Coercivity;
D O I：
10.1016/j.matlet.2023.134287
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The coercivity of HDDR (Pr, Nd, Ce)-Fe-B magnetic powders can be significantly enhanced from 3040 Oe to 7271 Oe through a unique grain boundary diffusion process known as rotating adhering diffusion, which uses Pr64Fe7Al9Ga20 as a diffusion source. Microstructural analysis revealed that the diffusion process resulted in a substantial increase in grain boundaries, as well as the formation of a Pr-rich shell in the Nd2Fe14B grains. Furthermore, the replacement of partial Nd element by Pr element in the diffusion source also caused a decrease in the thermal stability of the powders by 8.06 K. This research provides significant insight into the further development of high-performance Nd-Fe-B materials.
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页数：5
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