各向异性粘结稀土永磁材料研究  

Study of Anisotropic Hard Magnetic Materials

作　　者：杨金波[1] 韩景智[1] 刘顺荃[1] 王常生[1] 杜红林[1] 杨应昌[1] 

机构地区：[1]北京大学物理学院,介观物理与人工微结构国家重点实验室,量子物质科学协同创新中心,北京100871

出　　处：《中国材料进展》2015年第11期819-828,840,共10页Materials China

基　　金：国家自然科学基金资助项目(51371009,51071002,11275013,51171001)

摘　　要：综述了作者课题组在各向异性Re-Fe-N(Re=Nd,Sm)和Re-Fe-B(Re=Nd,Pr)粘结永磁材料方面的研究结果。通过利用中子衍射、磁性测量、电镜等手段,紧密结合电子结构计算系统研究了磁性材料结构和性质的关系,阐明了间隙原子效应提高Re-Fe材料磁性的物理根源,提出了制备无缺陷单晶颗粒型各向异性永磁Re-Fe-N磁粉的技术路线,以此为指导,开发出了高性能各向异性Re-Fe-N磁性材料和磁体的产业化关键技术和设备,并建成了百吨级生产线。发现了织构型HDDR NdFe-B永磁粉形成的关键机制及其实现高矫顽力的方法,成功实现高性能HDDR(Pr,Nd)_2Fe_(14)B磁粉和高温度稳定性磁粉的稳定制备。研究了单相磁体和杂化磁体制备技术,制备了高性能的各向异性粘结磁体,为未来实现各向异性磁体大规模生产进行了积极的探索。This paper reported the results of the studying on anisotropic magnetic materials of Re-Fe-N （ Re = Nd, Sm） and Re2Fe14 B （Re = Nd, Pr）. By means of neutron diffraction, magnetic measurements, electron microscope and electronic structure calculation, a systematic investigation has been made to understand the interstitial atom effects on the magnetic properties of the Re-Fe compounds. By the understanding of the relationship among the intrinsic magnetic properties, the domain structure and fabrication process, high performance magnetic powders based on the 1：12 and 2：17 nitrides have been successfully produced in large scale. We have also investigated the formation mechanism for the high textured HDDR Nd-Fe-B magnetic powders, and successfully fabricated HDDR （Pr, Nd）2Fe14 B powders with high coercivity and high energy product. We have tried to develop key industrialization technologies for high-performance anisotropic Re-Fe-N and Re2Fe14B magnetic powders and magnets, and a 100-ton production line for Re-Fe-N magnetic powders was built up. The high-performance anisotropic bonded magnet based on Re-Fe-N and Re2Fe14B were explored.

关 键 词：永磁材料 磁性能 各向异性粘结磁体 矫顽力 温度稳定性 

分 类 号：TM273[一般工业技术—材料科学与工程]