Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets
In this work, SEM images analysis and fractal dimension calculations are performed on the fracture surfaces for N50-type with low coercivity, 30 EH-type with high coercivity, and isotropic Nd-Fe-B permanent magnets. It is discovered for the first time that the difference between the fractal dimensio...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542100898X |
| _version_ | 1818969348226678784 |
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| author | Yongli Xing Qisong Sun Minggang Zhu Jiaming Bai Qiang Wang |
| author_facet | Yongli Xing Qisong Sun Minggang Zhu Jiaming Bai Qiang Wang |
| author_sort | Yongli Xing |
| collection | DOAJ |
| description | In this work, SEM images analysis and fractal dimension calculations are performed on the fracture surfaces for N50-type with low coercivity, 30 EH-type with high coercivity, and isotropic Nd-Fe-B permanent magnets. It is discovered for the first time that the difference between the fractal dimensions of fracture surface parallel and perpendicular to the c-axis D∥ and D⊥ for N50-type magnet with low coercivity is large, and the difference between the fractal dimensions of D∥ and D⊥ for 30 EH-type magnet with high coercivity is small. However, there is almost no difference in the fractal dimension of D∥ and D⊥ for isotropic magnet. The correlation between anisotropic fractal dimension of the fracture surface and coercivity is revealed. The difference between the fractal dimension of fracture surface D∥ and D⊥ not only reflects the difference in micro morphology, but also serves as an important performance parameter to characterize the coercivity of the magnet, which provides new insights for studying the relationship between the magnetic properties and the microstructure of permanent magnetic materials. |
| first_indexed | 2024-12-20T14:19:09Z |
| format | Article |
| id | doaj.art-8569c8a7ad7344e39be89c1f5c794d3b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-20T14:19:09Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-8569c8a7ad7344e39be89c1f5c794d3b2022-12-21T19:37:58ZengElsevierJournal of Materials Research and Technology2238-78542021-11-0115745753Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnetsYongli Xing0Qisong Sun1Minggang Zhu2Jiaming Bai3Qiang Wang4School of Information Engineering, China University of Geosciences, Beijing 100083, China; Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, ChinaDivision of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China; School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110819, ChinaDivision of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China; School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Corresponding author.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110819, ChinaIn this work, SEM images analysis and fractal dimension calculations are performed on the fracture surfaces for N50-type with low coercivity, 30 EH-type with high coercivity, and isotropic Nd-Fe-B permanent magnets. It is discovered for the first time that the difference between the fractal dimensions of fracture surface parallel and perpendicular to the c-axis D∥ and D⊥ for N50-type magnet with low coercivity is large, and the difference between the fractal dimensions of D∥ and D⊥ for 30 EH-type magnet with high coercivity is small. However, there is almost no difference in the fractal dimension of D∥ and D⊥ for isotropic magnet. The correlation between anisotropic fractal dimension of the fracture surface and coercivity is revealed. The difference between the fractal dimension of fracture surface D∥ and D⊥ not only reflects the difference in micro morphology, but also serves as an important performance parameter to characterize the coercivity of the magnet, which provides new insights for studying the relationship between the magnetic properties and the microstructure of permanent magnetic materials.http://www.sciencedirect.com/science/article/pii/S223878542100898XNd-Fe-BMicrostructureFractal dimensionCoercivityAnisotropy |
| spellingShingle | Yongli Xing Qisong Sun Minggang Zhu Jiaming Bai Qiang Wang Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets Journal of Materials Research and Technology Nd-Fe-B Microstructure Fractal dimension Coercivity Anisotropy |
| title | Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets |
| title_full | Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets |
| title_fullStr | Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets |
| title_full_unstemmed | Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets |
| title_short | Correlation between anisotropic fractal dimension of fracture surface and coercivity for Nd-Fe-B permanent magnets |
| title_sort | correlation between anisotropic fractal dimension of fracture surface and coercivity for nd fe b permanent magnets |
| topic | Nd-Fe-B Microstructure Fractal dimension Coercivity Anisotropy |
| url | http://www.sciencedirect.com/science/article/pii/S223878542100898X |
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