Magnetic-Property Assessment on Dy-Nd-Fe-B Permanent Magnet by Thermodynamic Calculation and Micromagnetic Simulation

doi:10.3390/ma15217648

IMR OpenIR

	Magnetic-Property Assessment on Dy-Nd-Fe-B Permanent Magnet by Thermodynamic Calculation and Micromagnetic Simulation
	Dai, Zhiming 1,2; Li, Kai 1,3; Wang, Zhenhua 1; Liu, Wei 1; Zhang, Zhidong 1
通讯作者	Wang, Zhenhua(zhwang@imr.ac.cn)
	2022-11-01
发表期刊	MATERIALS
卷号	15 期号:21 页码:12
摘要	Heavy rare-earth (HRE) elements are important for the preparation of high-coercivity permanent magnets. A further understanding of the thermodynamic properties of HRE phases, and the magnetization reversal mechanism of magnets are still critical issues to obtain magnets that can achieve better performance. In this work, the Nd-Dy-Fe-B multicomponent system is investigated via the calculation of the phase diagram (CALPHAD) method and micromagnetic simulation. The phase composition of magnets with various ratios of Nd and Dy is assessed using critically optimized thermodynamic data. gamma-Fe and Nd2Fe17 phases are suppressed when partial Nd is substituted with Dy (<9.3%), which, in turn, renders the formation of Nd2Fe14B phase favorable. The influence of the magnetic properties of grain boundaries (GBs) on magnetization reversal is detected by the micromagnetic simulations with the 3D polyhedral grains model. Coercivity was enhanced with both 3 nm nonmagnetic and the hard-magnetic GBs for the pinning effect besides the GBs. Moreover, the nucleation and propagation of reversed domains in core-shell grains are investigated, which suggests that the magnetic structure of grains can also influence the magnetization reversal of magnets. This study provides a theoretical route for a high-efficiency application of the Dy element, realizing a deterministic enhancement of the coercivity in Nd-Fe-B-based magnets.
关键词	micromagnetic simulation permanent magnet magnetization reversal CALPHAD microstructure
资助者	National Key R&D Program of China ; National Nature Science Foundation of China ; Jiangsu Universities Natural Science Foundation
DOI	10.3390/ma15217648
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2021YFB3500100] ; National Nature Science Foundation of China[52031014] ; National Nature Science Foundation of China[51771198] ; Jiangsu Universities Natural Science Foundation[21KJB140017]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000881171200001
出版者	MDPI
引用统计	被引频次：3[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/321006/176759
专题	中国科学院金属研究所
通讯作者	Wang, Zhenhua
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Huaiyin Normal Univ, Dept Phys, Jiangsu Key Lab Modern Measurement Technol & Inte, 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. Magnetic-Property Assessment on Dy-Nd-Fe-B Permanent Magnet by Thermodynamic Calculation and Micromagnetic Simulation[J]. MATERIALS,2022,15(21):12.
APA	Dai, Zhiming,Li, Kai,Wang, Zhenhua,Liu, Wei,&Zhang, Zhidong.(2022).Magnetic-Property Assessment on Dy-Nd-Fe-B Permanent Magnet by Thermodynamic Calculation and Micromagnetic Simulation.MATERIALS,15(21),12.
MLA	Dai, Zhiming,et al."Magnetic-Property Assessment on Dy-Nd-Fe-B Permanent Magnet by Thermodynamic Calculation and Micromagnetic Simulation".MATERIALS 15.21(2022):12.