采用HDDR技术制备NdFeCoB合金磁各向异性磁粉,研究了添加元素Mn,Al和Zr对NdFeCoB合金HDDR磁粉磁性能及磁各向异性的影响. 结果发现:在NdFeCoB合金中加入2%Mn,可提高合金HDDR磁粉的磁各向异性和剩磁,但磁粉的矫顽力和最大磁能积降低;在NdFeCoB合金中,分别加入0.8%Al,0.1%Zr时,可使合金的HDDR磁粉的磁各向异性DOA值从0.23增加到0.5和0.41,但此时磁粉的矫顽力和最大磁能积较低;加入2%Mn,0.8%Al和0.1%Zr,没有改变NdFeCoB合金的相组成;添加Mn,Al,Zr使NdFeCoB合金HDDR磁粉磁各向异性增加,与这些元素的加入提高了硬磁相Nd2Fe14B在氢气中的稳定性有关.
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