利用X射线衍射分析(XRD)和BH测试仪分别研究了元素Tb、Zr的添加对HD法制备NdFeB永磁体的微结构及磁性能的影响规律.微结构研究表明,元素Tb、Zr添加前后的磁体都主要由四方相Nd2Fe14B (P42/mnm)和微量的富Nd相构成；但Tb和Zr的添加明显改变了永磁体的取向特性和磁性能；采用HORTA法计算表明,Tb和Zr的添加虽然都使永磁体的(004)、(006)、(008)极密度因子减小,但是室温下磁性能测试表明,Zr的添加降低了磁体的矫顽力,而Tb添加后永磁体的矫顽力有了明显的提升,从2038 kA/m提升到2302 kA/m; Kronmüller-Plot关系曲线表明,3种合金的矫顽力机理均为磁畴成核反转机制.
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