(西安交通大学材料科学与工程学院， 西安710049)
摘 要: 研究了在 NdFeB 磁体晶间添加W, Mo或Nb等合金元素对显微组织和磁性能的影响。 结果表明，适量的 W, Mo或Nb能不同程度提高NdFeB磁体的矫顽力，对剩磁影响不大。显微组织分析表明，矫顽力的提高可归因于晶间 TFeB(T＝W, Mo或Nb) 新相的出现。 进一步分析表明， 晶间微合金化能够有效改善NdFeB磁体组织与性能。
关键字: Nd-Fe-B磁体 磁性能 显微组织 添加剂
（School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China）
Abstract:The alloying elements W, Mo and Nb were added into the intergranular regions of sintered FeNdB-based magnets and their effects on microstructures and magnetic properties were investigated. Results showed that an appropriate amount of W, Mo and Nb additives could enhance the coercivity and had little effect on the remanence of the magnets. The variation of the coercivity was attributed to the occurrence of a new intergranular TFeB(T=W, Mo or Nb) phase. A further analysis revealed that microalloying of the intergranular region is a promising way to improve the properties of FeNdB-based magnets.
Key words: Nd-Fe-B magnets magnetic property microstructure additives
