Grain boundary diffusion of sintered NdFeB magnets by TbAl coatings with various Al addition amount
文献类型：期刊论文
| 作者 | Li CC(李成灿)1,2,3; Xu Y(许亿)1,3; Li GD(李国栋)1,3; Gao FY(高方圆)1,3; Jiang WH(姜伟浩)1,2,3; Wang Y(王粤)1,2,3; Xia Y(夏原)1,3 |
| 刊名 | JOURNAL OF RARE EARTHS
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 43期号:7页码:1455-1464 |
| 关键词 | Sintered NdFeB magnets Grain boundary diffusion process TbAl coatings Tb-rich shells Intrinsic coercivity Rare earths |
| ISSN号 | 1002-0721 |
| DOI | 10.1016/j.jre.2024.07.014 |
| 通讯作者 | Xu, Yi(xuyi@imech.ac.cn) ; Xia, Yuan(xia@imech.ac.cn) |
| 英文摘要 | In this work, the effect of the Al addition amount in the TbAl coatings on the grain boundary diffusion process (GBDP) of Tb were systematically explored. Direct current magnetron sputtering (DCMS) method was utilized in co-sputtering manner to synthesize the TbAl coatings with certain Tb consumption and various Al addition amount. Results show that the moderate Al addition amount significantly improves the wettability of grain boundary (GB) phases, thereby acquiring more continuous and uniform Tb-rich shells and GB phases between matrix phases, as well as deeper diffusion depth and denser microstructure. The largest increase amplitude of intrinsic coercivity (Hcj) is improved by 78.4% in TbAldiffused magnet compared to the pure Tb-diffused magnet, while the remanence (Br) is expected to show an overall decreasing tendency accompanied with a slight increase in the decreasing process. However, when the Al addition amount is excessive, magnetic dilution effect is enhanced, and the Tbrich shells and GB phases between matrix phases become fuzzy and even invisible, which in turn deteriorates the magnetic properties of diffused magnets. (c) 2024 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies. |
| 分类号 | 一类 |
| WOS关键词 | FE-B MAGNETS ; COERCIVITY ENHANCEMENT ; TBF3 DIFFUSION ; ND ; DY ; PHASE ; ANISOTROPY ; PR ; MICROSTRUCTURE ; SHELL |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:001521663100011 |
| 其他责任者 | 许亿，夏原 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102271]  |
| 专题 | 宽域飞行工程科学与应用中心 |
| 作者单位 | 1.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li CC,Xu Y,Li GD,et al. Grain boundary diffusion of sintered NdFeB magnets by TbAl coatings with various Al addition amount[J]. JOURNAL OF RARE EARTHS,2025,43(7):1455-1464. |
| APA | 李成灿.,许亿.,李国栋.,高方圆.,姜伟浩.,...&夏原.(2025).Grain boundary diffusion of sintered NdFeB magnets by TbAl coatings with various Al addition amount.JOURNAL OF RARE EARTHS,43(7),1455-1464. |
| MLA | 李成灿,et al."Grain boundary diffusion of sintered NdFeB magnets by TbAl coatings with various Al addition amount".JOURNAL OF RARE EARTHS 43.7(2025):1455-1464. |
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来源：力学研究所
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