【摘要】 为了改善NdFeB磁性材料的磁性能和防腐性能,采用双合金法在晶界处添加Ho纳米粉制备高性能永磁材料。对烧结永磁体（PrNd）_29.9Dy_0.1B₁Co₁Cu_0.15Fe_bal+xHo（添加Ho纳米粉的质量分数分别为0、0.2%、0.4%、0.6%和0.8%）的形貌、微观结构及成分、磁性能和腐蚀性进行了分析。结果表明,随着Ho元素含量的增加,磁体矫顽力增幅变大;剩磁和最大磁能积降幅渐快,从0.6%到0.8%下降幅度最大。当Ho添加量为0.6%时,综合性能达到最佳。磁体矫顽力达到1108 kA·m^-1,提升了5.8%,剩磁和最大磁能积略微下降,分别为0.3%和0.2%;并且在3.5%NaCl溶液中,添加0.6%Ho纳米粉的钕铁硼磁体,腐蚀电流最小,达到0.327μA·cm^-2,提升了近一个数量级;I_（006）/I_（105）比值算出,添加量为0.6%Ho时取向度为1.45,磁体密度增加1.6%,达到7.61 g·cm^-3。更多还原

【Abstract】 The NdFeB magnetic materials were prepared by double alloy method with adding Ho nanopowder to grain boundaries to improve the magnetic property and corrosion-resistant performance. The morphology, phase, magnetic property and corrosion-resistant performance of（PrNd）_29.9Dy_0.1B₁Co₁Cu_0.15Fe_bal+xHo（x=0,0.2%,0.4%,0.6% and 0.8%, Mass fraction） were analyzed, respectively. The results indicate that the coercive force was enhanced with increase of Ho content, and the remanence and maximum magnetic energy product declined. When content of Ho was from 0.6% to 0.8%, the decline of the remanence and maximum magnetic energy product was the fastest. When adding 0.6% Ho powders, the combination property of samples was the best, the coercive force reached 1108 kA·m^-1, with a increase of 5.8%,and the remanence and maximum magnetic energy product were fell down by 0.3% and 0.2%, respectively. In the 3.5%NaCl solution, the sample with 0.6% Ho powders reached the smallest corrosion current of 0.327 μA·cm^-2. And the orientation degree of samples was 1.45 calculated by I_（006）/I_（105）, the magnet density reached to 7.61 g·cm^-3, with a increase of 1.6%.更多还原