利用熔体快淬和晶化处理的方法制备了快淬Fe3B/Nd2Fe14B永磁材料.采用XRD,DTA,VSM等方法对合金的晶化行为和磁性能进行研究.结果表明:对于Fe3B/Nd2Fe14B熔体快淬永磁粉末,升温速率对各相的析出和分解温度有一定的影响.完全过淬的Nd4.5Fe77B18.5和Nd4Fe77Cr0.5B18.5合金熔体快淬粉在进行973 K,7 min晶化处理过程中,首先形成Nd2Fe23B3相,然后Nd2Fe23B3相发生分解,其产物为Fe3B/Nd2Fe14B,此后再没有发生其它的相转变.当晶化温度大于953 K,保温10 min后,样品的剩磁、矫顽力和最大磁能积明显提高.微量元素Cr的添加对相转变温度有影响,同时可以细化晶粒,提高矫顽力,从而改善材料的永磁性能.
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