Effect of HD Process on Microstructure and Hard Magnetic Properties of NdFeAlB Magnet
来源期刊：JOURNAL OF RARE EARTHS2002年第3期
论文作者：陈晓东 杨昌平 陈秀云 石大立 朱静 姜忠良
Key words：rare earths; hydrogen decrepitation; NdFeB; permanent magnet;
Abstract: The effect of Hydrogen Decrepitation (HD) process on the magnetic properties and microstructure of sintered NdFeAlB magnet (HD magnet) was investigated. The results show that the coercivity of HD magnet is higher than that of traditional ball milling (BM) magnet, while the remanence and the maximum energy product of HD magnet are lower. Microstructure analysis shows that some fine un-sintered powders are distributed at the grain boundaries of HD magnet. X-ray diffraction (XRD) analysis reveals that the degree of easy axis alignment of HD magnet is lower. Some ideas to improve the current HD process were proposed.
陈晓东1，杨昌平1，陈秀云1，石大立1，朱静1，姜忠良1
(1.School of Materials Science & Engineering, Tsinghua University, Beijing 100084, China)
Abstract:The effect of Hydrogen Decrepitation (HD) process on the magnetic properties and microstructure of sintered NdFeAlB magnet (HD magnet) was investigated. The results show that the coercivity of HD magnet is higher than that of traditional ball milling (BM) magnet, while the remanence and the maximum energy product of HD magnet are lower. Microstructure analysis shows that some fine un-sintered powders are distributed at the grain boundaries of HD magnet. X-ray diffraction (XRD) analysis reveals that the degree of easy axis alignment of HD magnet is lower. Some ideas to improve the current HD process were proposed.
Key words:rare earths; hydrogen decrepitation; NdFeB; permanent magnet;
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