Grain boundary diffusion mechanism in Dy-diffused Nd-Fe-B sintered magnets

doi:10.1088/1361-6463/ad3bc6

IMR OpenIR

	Grain boundary diffusion mechanism in Dy-diffused Nd-Fe-B sintered magnets
	Dai, Zhiming 1,2; Li, Kai 1,3; Wang, Zhenhua 1; Wang, Tingting 2; Liu, Wei 1; Zhang, Zhidong 1
通讯作者	Wang, Zhenhua(zhwang@imr.ac.cn)
	2024-08-02
发表期刊	JOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN	0022-3727
卷号	57 期号:30 页码:9
摘要	Grain boundary diffusion (GBD) is an effective method to enhance the thermal stability of Nd-Fe-B based permanent magnets. When developing a high-performance magnet, it is essential to carry out a study on its mechanisms, in order to reveal the distribution regulation of diffusion solutes and microstructural evolution. In the present work, the phase-field method is applied to investigate the thermodynamic features and the heavy rare-earth Dy migration in a Dy-diffused Nd-Fe-B magnet during the GBD process. In the simulation process, the grain phase transformation and volume diffusion were taken into consideration and the effects of the diffusion mode, initial diffusion source concentration, grain size, and grain boundary (GB) width were explored in a set of magnet models with various grain sizes. An optimized fitting function was introduced to evaluate the solute distribution in grain boundaries and the effective diffusion coefficient. It is shown that the diffusion mode and the GB width have significant impacts on the effective diffusion coefficient. The results provide a theoretical scheme concerning the quantitative evaluation of GBD efficiency based on thermodynamic analysis.
关键词	grain boundary diffusion permanent magnet phase field simulation heavy rare earth microstructure evolution
资助者	Key R&D Program of China
DOI	10.1088/1361-6463/ad3bc6
收录类别	SCI
语种	英语
资助项目	Key R&D Program of China
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:001215209500001
出版者	IOP Publishing Ltd
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185754
专题	中国科学院金属研究所
通讯作者	Wang, Zhenhua
作者单位	1.Inst Met Sci & Technol, Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Huaiyin Normal Univ, Dept Phys, Jiangsu Key Lab Modern Measurement Technol & Intel, Huaian 223300, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Dai, Zhiming,Li, Kai,Wang, Zhenhua,et al. Grain boundary diffusion mechanism in Dy-diffused Nd-Fe-B sintered magnets[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2024,57(30):9.
APA	Dai, Zhiming,Li, Kai,Wang, Zhenhua,Wang, Tingting,Liu, Wei,&Zhang, Zhidong.(2024).Grain boundary diffusion mechanism in Dy-diffused Nd-Fe-B sintered magnets.JOURNAL OF PHYSICS D-APPLIED PHYSICS,57(30),9.
MLA	Dai, Zhiming,et al."Grain boundary diffusion mechanism in Dy-diffused Nd-Fe-B sintered magnets".JOURNAL OF PHYSICS D-APPLIED PHYSICS 57.30(2024):9.