研究了Cu/Al复合添加对(Pr,Nd)12.8Dy1.0Feba1Nb0.1B6.0 (at％)烧结磁体抗腐蚀性和磁性的影响.结果表明:添加0.6 at％ Al和0.2 at％ Cu时磁体的抗腐蚀性最强,磁体在0.001 mol/L HCl溶液中的腐蚀电流密度从46.90 μA.cm-2降低到11.14 μA.cm2,在湿热环境中腐蚀100 h的质量损失从13.2 mg·cm-2降低到0.4 mg·cm-2.抗腐蚀性的提高源于Cu和Al对富(Pr,Nd)晶界相化学稳定性的提高及其分布状况的改善.同时,Cu/Al对烧结NdFeB晶界结构的优化也有利于磁体磁性能的提高.
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