Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy
TbHx and Tb86Al7Co7 alloys were used as diffusion sources to enhance the coercivity of Nd-Fe-B magnets. The coercivity enhancement and microstructure of the magnets were examined after diffusion, and the results showed that the coercivity increased from the original 1525.1 to 2382.4 kA/m and 2274.9...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-10-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0147992 |
| _version_ | 1797634150519275520 |
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| author | Liwei Liang Haifeng Wang Renhui Liu Pengfei Ma |
| author_facet | Liwei Liang Haifeng Wang Renhui Liu Pengfei Ma |
| author_sort | Liwei Liang |
| collection | DOAJ |
| description | TbHx and Tb86Al7Co7 alloys were used as diffusion sources to enhance the coercivity of Nd-Fe-B magnets. The coercivity enhancement and microstructure of the magnets were examined after diffusion, and the results showed that the coercivity increased from the original 1525.1 to 2382.4 kA/m and 2274.9 kA/m in Tb86Al7Co7 and TbHx diffused magnets, respectively. This improvement in coercivity was attributed to the formation of a Tb-rich shell and a new NdTb-AlCo-grain-boundary phase. The Tb86Al7Co7 alloy had a higher diffusion efficiency and diffused deeper than the TbHx alloy due to the low melting point of the NdTb-AlCo-grain-boundary phase. The coercivity temperature coefficient of the magnets improved, increasing from the original −0.55%/K to −0.42%/K and −0.44%/K in Tb86Al7Co7 and TbHx diffused magnets, respectively. The Tb86Al7Co7 diffused magnet exhibited better thermal stability than the TbHx diffused magnet, which suggests that Nd-Fe-B magnets could potentially be used at considerably higher temperatures than they are now. |
| first_indexed | 2024-03-11T12:03:32Z |
| format | Article |
| id | doaj.art-4ad86fa786d84101853afcc89dec5651 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-11T12:03:32Z |
| publishDate | 2023-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-4ad86fa786d84101853afcc89dec56512023-11-07T17:47:01ZengAIP Publishing LLCAIP Advances2158-32262023-10-011310105314105314-610.1063/5.0147992Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloyLiwei Liang0Haifeng Wang1Renhui Liu2Pengfei Ma3Jiang Xi University of Science and Technology, No. 86 Hongqi Road, Zhanggong District, Ganzhou 341000, ChinaGanjiang Innovation of Academy, Chinese Academy of Science, No. 1 Kexueyuan Road, Ganxian District, Ganzhou 341000, ChinaJiang Xi University of Science and Technology, No. 86 Hongqi Road, Zhanggong District, Ganzhou 341000, ChinaGanjiang Innovation of Academy, Chinese Academy of Science, No. 1 Kexueyuan Road, Ganxian District, Ganzhou 341000, ChinaTbHx and Tb86Al7Co7 alloys were used as diffusion sources to enhance the coercivity of Nd-Fe-B magnets. The coercivity enhancement and microstructure of the magnets were examined after diffusion, and the results showed that the coercivity increased from the original 1525.1 to 2382.4 kA/m and 2274.9 kA/m in Tb86Al7Co7 and TbHx diffused magnets, respectively. This improvement in coercivity was attributed to the formation of a Tb-rich shell and a new NdTb-AlCo-grain-boundary phase. The Tb86Al7Co7 alloy had a higher diffusion efficiency and diffused deeper than the TbHx alloy due to the low melting point of the NdTb-AlCo-grain-boundary phase. The coercivity temperature coefficient of the magnets improved, increasing from the original −0.55%/K to −0.42%/K and −0.44%/K in Tb86Al7Co7 and TbHx diffused magnets, respectively. The Tb86Al7Co7 diffused magnet exhibited better thermal stability than the TbHx diffused magnet, which suggests that Nd-Fe-B magnets could potentially be used at considerably higher temperatures than they are now.http://dx.doi.org/10.1063/5.0147992 |
| spellingShingle | Liwei Liang Haifeng Wang Renhui Liu Pengfei Ma Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy AIP Advances |
| title | Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy |
| title_full | Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy |
| title_fullStr | Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy |
| title_full_unstemmed | Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy |
| title_short | Coercivity enhancement of sintered Nd-Fe-B magnets by diffusing TbHx and Tb86Al7Co7 alloy |
| title_sort | coercivity enhancement of sintered nd fe b magnets by diffusing tbhx and tb86al7co7 alloy |
| url | http://dx.doi.org/10.1063/5.0147992 |
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