Gd、Y含量对烧结Nd-Fe-B磁体磁性能的影响  

Effect of Gd, Y Content on the Magnetic Properties of Sintered Nd-Fe-B Permanent Magnet

作　　者：王发立[1] 张茂才[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《磁性材料及器件》2009年第4期31-36,共6页Journal of Magnetic Materials and Devices

摘　　要：分别采用Gd、Y等量取代原磁体中的部分Nd，制备了烧结（GdxNd1-x）16Fe78B6（x=0．15，0．2，0．3，0．4，0．5）和（YxNd1-x）16Fe78B6（x=0．15，0．2，0．3，0．4，0．5）永磁材料，研究了添加元素Gd和Y的含量、烧结温度和回火温度对材料磁性能和显微结构的影响。实验结果表明，Gd、Y替代Nd含量最佳范围为0～0．15。烧结温度为1120℃、回火温度为800℃时（Gd0.15Nd0．85）16Fe78B6磁体的磁性能最佳。烧结温度为1120℃、回火温度为600℃时（Y0．15Nd0.85）16Fe78B6磁体的磁性能较好。显微组织研究表明，两种磁体样品分别产生新相钆铁钕氧化物相和钇铁钕氧化物相。Sintered （GdxNd1-x）16Fe78B6（x=0.15,0.2,0.3,0.4,0.5） and （YxNd1-x） 16Fe78B6（x=0.15,0.2,0.3,0.4,0.5） magnets were prepared by partly substituting same amount of Gd and Y for Nd. The effect of content of Gd, Y elements, sintering temperature and tempering temperature were studied on the microstructure and magnetic properties of sintered magnets. The results indicated that proper substituting amount of Gd, Y is in the range of 0-15wt%. （Gd0.15Nd0.85）16 Fe78B6 magnet has the best magnetic properties when sintering at 1120℃ and tempered at 800℃. While （Y0.15Nd0.85）16Fe78B6 magnet has the best magnetic properties when sintering at 1120℃ and tempering at 600℃. Microstructure analysis revealed that two types of new phases, gadolinium neodymium iron oxide phase and neodymium yttrium iron oxide phase were produced in the Gd- and Y-substituted magnets, respectively.

关 键 词：烧结钕铁硼磁体 GD Y取代 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]