高性能烧结NdFeB磁体的制备技术  

Improved processing techniques for high performance NdFeB magnets

作　　者：包小倩[1] 李青华[1] 朱学新[2] 李成栋[2] 朱洁[1] 张茂才[1] 周寿增[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 [2]北京有色金属研究总院国家有色金属复合材料工程技术中心,北京100088

出　　处：《北京科技大学学报》2006年第9期850-853,共4页Journal of University of Science and Technology Beijing

基　　金：国家重点基础研究发展规划项目(No.G2000-67201-3)

摘　　要：采用鳞片铸锭、氢爆加气流磨制粉、脉冲场振动取向加橡皮模等静压成型等改进的技术在工业生产线上成功制造了N52高性能烧结NdFeB磁体.用X射线衍射仪、光学金相显微镜、透射电镜和扫描电镜研究了磁体的结构;用磁强自动记录仪测量了磁体的退磁曲线.实验结果表明,Nd29·0Pr0·5Ga0·2Fe69·1Nb0·2B1·0磁体室温磁性能达到Br=1·457T,Hci=1097kA·m-1,(BH)max=409kJ·m-3,且磁体的均匀性和一致性较好.A high performance sintered NdFeB magnet with N52 was prepared by strip casting, hydrogen decrepitation, jet milling, rubber isostatic pressing with impulse magnetic field and vibrating. The structure of the magnet was investigated by XRD, optical microscope, TEM and SEM, and its demagnetization curve was tested by magnetograph. The results show that the room-temperature magnetic properties of the Nd29.0Pr0.5Ga0.2Fe69.tNb0.2B1.0 magnet can reach up to Br=1.457T,Hci=1097kA·m^-1,（BH）max=409kJ·m^-3, with a better homogeneity and consistency.

关 键 词：烧结NDFEB磁体 鳞片铸锭 氢爆 橡皮模等静压 

分 类 号：TM273[一般工业技术—材料科学与工程]