Coercivity enhancement of Nd2Fe14B/α-Fe nanocomposite magnets through neodymium diffusion under annealing |
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| Authors: | WANG Yupu YOU Caiyin WANG Junwei TIAN Na LU Zhengxin GE Liling |
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| Affiliation: | 1. School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China
2. School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China |
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| Abstract: | The coercivity enhancement of ball-milled Nd2Fe14B/α-Fe nanocomposite magnets was investigated. It was found that the coercivity could be enhanced through mixing a small amount of Nd powder with as-milled Fe-rich Nd-Fe-B powders. The annealed samples were investigated by means of X-ray diffraction, scanning electron microscopy and magnetic measurement systems. Under annealing, some of Nd powders promoted the formation of hard magnetic phase Nd2Fe14B. On the other hand, a few of Nd would diffuse into the interface of Nd2Fe14B/α-Fe nanocomposite to compensate for the loss of the interfacial magnetic anisotropy. These two features are all beneficial to the coercivity. |
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| Keywords: | coercivity nanocomposite magnet microstrueture Nd diffusion rare earths |
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