Recent progress of grain boundary diffusion process for hot-deformed Nd-Fe-B magnets |
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| Affiliation: | 1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;2. CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341119, China |
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| Abstract: | Grain boundary diffusion process (GBDP) was first proposed for sintered Nd-Fe-B magnets to achieve the high utilization efficiency of heavy rare earth elements. Recent success of fabricating high performance nanocomposite magnets by GBDP indicates that this method also exerts huge applicable potential on hot-deformed Nd-Fe-B magnets. In this review, the development and magnetic property enhancement mechanisms of different diffusion methods proposed on hot-deformed magnets were thoroughly elucidated. Moreover, the improve room for further property enhancement and the accompanying problems of GBDP on hot-deformed magnets are also discussed in this article. |
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| Keywords: | Hot-deformed Nd-Fe-B magnets Grain boundary diffusion process Magnetic properties Micromagnetic simulations Rare earths |
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