Grain boundary diffusion mechanism in Dy-diffused Nd-Fe-B sintered magnets
文献类型：期刊论文
| 作者 | Dai, Zhiming1,2; Li, Kai1,3; Wang, Zhenhua1; Wang, Tingting2; Liu, Wei1; Zhang, Zhidong1 |
| 刊名 | JOURNAL OF PHYSICS D-APPLIED PHYSICS
 |
| 出版日期 | 2024-08-02 |
| 卷号 | 57期号:30页码:9 |
| 关键词 | grain boundary diffusion permanent magnet phase field simulation heavy rare earth microstructure evolution |
| ISSN号 | 0022-3727 |
| DOI | 10.1088/1361-6463/ad3bc6 |
| 通讯作者 | Wang, Zhenhua(zhwang@imr.ac.cn) |
| 英文摘要 | 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. |
| 资助项目 | Key R&D Program of China |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001215209500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Key R&D Program of China |
| 源URL |  |
| 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.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. |
入库方式： OAI收割
来源：金属研究所
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