Magnetic-Property Assessment on Dy-Nd-Fe-B Permanent Magnet by Thermodynamic Calculation and Micromagnetic Simulation
文献类型：期刊论文
| 作者 | Dai, Zhiming2,3; Li, Kai1,2; Wang, Zhenhua2; Liu, Wei2; Zhang, Zhidong2 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 15期号:21页码:12 |
| 关键词 | micromagnetic simulation permanent magnet magnetization reversal CALPHAD microstructure |
| DOI | 10.3390/ma15217648 |
| 通讯作者 | Wang, Zhenhua(zhwang@imr.ac.cn) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000881171200001 |
| 资助机构 | National Key R&D Program of China ; National Nature Science Foundation of China ; Jiangsu Universities Natural Science Foundation |
| 源URL | [http://ir.imr.ac.cn/handle/321006/176758]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, Zhenhua |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Huaiyin Normal Univ, Dept Phys, Jiangsu Key Lab Modern Measurement Technol & Inte, Huaian 223300, 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. |
入库方式： OAI收割
来源：金属研究所
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