Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3
There is a growing demand for high coercivity of NdFeB magnets with low heavy rare earth in the emerging applications. In this work, dip-coating 0.02 g and 0.09 g TbH3 on the Tb-containing NdFeB magnet enhance coercivity at room temperature，respectively. The highest coercivity achieve about 30 kOe a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422012303 |
| _version_ | 1818027075246751744 |
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| author | Toujun Zhou Renhui Liu Pengpeng Qu Guoqiang Xie Mianfu Li Zhenchen Zhong |
| author_facet | Toujun Zhou Renhui Liu Pengpeng Qu Guoqiang Xie Mianfu Li Zhenchen Zhong |
| author_sort | Toujun Zhou |
| collection | DOAJ |
| description | There is a growing demand for high coercivity of NdFeB magnets with low heavy rare earth in the emerging applications. In this work, dip-coating 0.02 g and 0.09 g TbH3 on the Tb-containing NdFeB magnet enhance coercivity at room temperature，respectively. The highest coercivity achieve about 30 kOe at room temperature after diffusion, which can apply to traction motors of electric vehicles. The magnetic field intensity distribution of magnet was analyzed by finite element method. Microstructures show TbH3 coat contents and original composition of NdFeB magnet influences the formation of Tb-rich shell and grain boundary phase, and determine finally diffusion depth and Tb concentration. The Tb atoms diffuse into the interior of the magnet, forming a network Tb-rich shell existed around Nd2Fe14B grains, resulting in the coercivity enhancement. |
| first_indexed | 2024-12-10T04:42:08Z |
| format | Article |
| id | doaj.art-99ea8af0fefc49559449e855fd0c7a17 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-10T04:42:08Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-99ea8af0fefc49559449e855fd0c7a172022-12-22T02:01:51ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012013911398Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3Toujun Zhou0Renhui Liu1Pengpeng Qu2Guoqiang Xie3Mianfu Li4Zhenchen Zhong5School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou, 341000, PR ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou, 341000, PR ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, PR China; Corresponding author.Ganzhou Qiandong Rare Earth Group Co, Ltd, Ganzhou, 341000, PR ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou, 341000, PR ChinaThere is a growing demand for high coercivity of NdFeB magnets with low heavy rare earth in the emerging applications. In this work, dip-coating 0.02 g and 0.09 g TbH3 on the Tb-containing NdFeB magnet enhance coercivity at room temperature，respectively. The highest coercivity achieve about 30 kOe at room temperature after diffusion, which can apply to traction motors of electric vehicles. The magnetic field intensity distribution of magnet was analyzed by finite element method. Microstructures show TbH3 coat contents and original composition of NdFeB magnet influences the formation of Tb-rich shell and grain boundary phase, and determine finally diffusion depth and Tb concentration. The Tb atoms diffuse into the interior of the magnet, forming a network Tb-rich shell existed around Nd2Fe14B grains, resulting in the coercivity enhancement.http://www.sciencedirect.com/science/article/pii/S2238785422012303Sintered NdFeB magnetsGrain boundary diffusionCoat contentsHigh coercivityMicrostructural evolution |
| spellingShingle | Toujun Zhou Renhui Liu Pengpeng Qu Guoqiang Xie Mianfu Li Zhenchen Zhong Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3 Journal of Materials Research and Technology Sintered NdFeB magnets Grain boundary diffusion Coat contents High coercivity Microstructural evolution |
| title | Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3 |
| title_full | Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3 |
| title_fullStr | Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3 |
| title_full_unstemmed | Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3 |
| title_short | Diffusion behavior and coercivity enhancement of Tb-containing NdFeB magnet by dip-coating TbH3 |
| title_sort | diffusion behavior and coercivity enhancement of tb containing ndfeb magnet by dip coating tbh3 |
| topic | Sintered NdFeB magnets Grain boundary diffusion Coat contents High coercivity Microstructural evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422012303 |
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