Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets
The magnetic properties, microstructure and orientation degrees of hot pressing magnet and hot deformation Nd-Fe-B magnets with different deformation ratios have been investigated in this paper. The remanence (Br) and maximum magnetic energy product ((BH)max) were enhanced gradually with the deforma...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2018-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5007112 |
| _version_ | 1818214371392749568 |
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| author | Zhaohui Guo Mengyu Li Junming Wang Zheng Jing Ming Yue Minggang Zhu Wei Li |
| author_facet | Zhaohui Guo Mengyu Li Junming Wang Zheng Jing Ming Yue Minggang Zhu Wei Li |
| author_sort | Zhaohui Guo |
| collection | DOAJ |
| description | The magnetic properties, microstructure and orientation degrees of hot pressing magnet and hot deformation Nd-Fe-B magnets with different deformation ratios have been investigated in this paper. The remanence (Br) and maximum magnetic energy product ((BH)max) were enhanced gradually with the deformation ratio increasing from 0% to 70%, whereas the coercivity (HCj) decreased. The scanning electron microscopy (SEM) images of fractured surfaces parallel to the pressure direction during hot deformation show that the grains tend to extend perpendicularly to the c-axes of Nd2Fe14B grains under the pressure, and the aspect ratios of the grains increase with the increase of deformation ratio. Besides, the compression stress induces the long axis of grains to rotate and the angle (θ) between c-axis and pressure direction decreases. The X-ray diffraction (XRD) patterns reveal that orientation degree improves with the increase of deformation ratio, agreeing well with the SEM results. The hot deformation magnet with a deformation ratio of 70% has the best Br and (BH)max, and the magnetic properties are as followed: Br=1.40 T, HCj=10.73 kOe, (BH)max=42.30 MGOe. |
| first_indexed | 2024-12-12T06:19:07Z |
| format | Article |
| id | doaj.art-f9460bcb6cdd423a891683752e37f0d9 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-12T06:19:07Z |
| publishDate | 2018-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-f9460bcb6cdd423a891683752e37f0d92022-12-22T00:34:57ZengAIP Publishing LLCAIP Advances2158-32262018-05-0185056234056234-610.1063/1.5007112289892ADVEffect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnetsZhaohui Guo0Mengyu Li1Junming Wang2Zheng Jing3Ming Yue4Minggang Zhu5Wei Li6Central Iron & Steel Research Institute, Beijing 100081, P.R. ChinaCentral Iron & Steel Research Institute, Beijing 100081, P.R. ChinaCentral Iron & Steel Research Institute, Beijing 100081, P.R. ChinaCentral Iron & Steel Research Institute, Beijing 100081, P.R. ChinaBeijing University of Technology, Beijing 100124, P.R. ChinaCentral Iron & Steel Research Institute, Beijing 100081, P.R. ChinaCentral Iron & Steel Research Institute, Beijing 100081, P.R. ChinaThe magnetic properties, microstructure and orientation degrees of hot pressing magnet and hot deformation Nd-Fe-B magnets with different deformation ratios have been investigated in this paper. The remanence (Br) and maximum magnetic energy product ((BH)max) were enhanced gradually with the deformation ratio increasing from 0% to 70%, whereas the coercivity (HCj) decreased. The scanning electron microscopy (SEM) images of fractured surfaces parallel to the pressure direction during hot deformation show that the grains tend to extend perpendicularly to the c-axes of Nd2Fe14B grains under the pressure, and the aspect ratios of the grains increase with the increase of deformation ratio. Besides, the compression stress induces the long axis of grains to rotate and the angle (θ) between c-axis and pressure direction decreases. The X-ray diffraction (XRD) patterns reveal that orientation degree improves with the increase of deformation ratio, agreeing well with the SEM results. The hot deformation magnet with a deformation ratio of 70% has the best Br and (BH)max, and the magnetic properties are as followed: Br=1.40 T, HCj=10.73 kOe, (BH)max=42.30 MGOe.http://dx.doi.org/10.1063/1.5007112 |
| spellingShingle | Zhaohui Guo Mengyu Li Junming Wang Zheng Jing Ming Yue Minggang Zhu Wei Li Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets AIP Advances |
| title | Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets |
| title_full | Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets |
| title_fullStr | Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets |
| title_full_unstemmed | Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets |
| title_short | Effect of deformation ratios on grain alignment and magnetic properties of hot pressing/hot deformation Nd-Fe-B magnets |
| title_sort | effect of deformation ratios on grain alignment and magnetic properties of hot pressing hot deformation nd fe b magnets |
| url | http://dx.doi.org/10.1063/1.5007112 |
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