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材料工程  2007 

纳米复合Pr2Fe14B/α-Fe永磁材料晶化行为和磁性能的研究

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Keywords: 纳米复合永磁材料,熔体快淬,晶化行为,磁性能

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Abstract:

利用熔体快淬和晶化处理方法制备了Pr2Fe14B/α-Fe纳米复合永磁材料。采用X射线衍射分析(XRD)、差热分析(DTA)、磁性测量(VSM)等方法对合金的晶化行为和磁性能进行研究。结果发现对于Pr2Fe14B/α-Fe熔体快淬永磁粉末,α-Fe相析出温度对材料升温速率敏感,可通过提高升温速率尽量使α-Fe和Pr2Fe14B两相的析出温度接近,但难以找到一个温度使两相同时大量析出。(Pr8.2Fe86.1B5.7)0.99Zr1淬态合金在963K时,会生成亚稳相Pr2Fe23B3,使磁性能恶化,延长晶化热处理时间或增高晶化热处理温度均可使亚稳相分解。合金在合适的条件下热处理后,材料磁性能较淬态样品有明显提高。

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