各向异性HDDR磁体磁性能与微结构的研究  

Study on the Magnetic Properties and Microstructure of the Anisotropic HDDR Magnets

作　　者：贾美爽 刘博文 刘飞 白锁 刘艳丽[1] 马强[1] JIA Mei-shuang;LIU Bo-wen;LIU Fei;BAI Suo;LIU Yan-li;MA Qiang(School of Science,Inner Mongolia University of Science and Technology,Baotou O14010,China)

机构地区：[1]内蒙古科技大学理学院,内蒙古包头014010

出　　处：《稀土》2022年第6期16-24,共9页Chinese Rare Earths

基　　金：内蒙古自然科学基金(2018LH05011);内蒙古高等学校科学技术项目(NJZY17169)。

摘　　要：利用放电等离子烧结技术制备全致密HDDR磁体,分别采用热变形,磁场取向的方法实现磁体的各向异性。对HDDR一次热压成型各向异性磁体进行了研究并探讨了其织构形成机制和矫顽力机理。将HDDR磁粉按照磁场取向成型→等静压→热压工艺制备全致密各向异性热压磁体,磁性能为H_(cj)=7.61 kOe,B_(r)=11.02 kGs,(BH)_(max)=21.54 MGOe,物相分析结果显示热压过程成功获得织构。The fully dense HDDR magnets were prepared by spark plasma sintering.The anisotropy of the magnets was achieved by hot deformation and magnetic field orientation.The anisotropic magnet formed by HDDR hot pressed was studied and the mechanism of texture and coercivity was discussed.The anisotropic and full dense hot-pressed magnet was prepared with the technology of magnetic alignment of the HDDR powders,isostatic pressing and hot pressing,presenting the magnetic properties of H_(cj)=7.61 kOe,B_(r)=11.02 kGs,(BH)_(max)=21.54 MGOe.The results of physical phase analysis showed that the texture was obtained successfully during the hot pressing process.

关 键 词：ND-FE-B HDDR 各向异性 取向热压一次成型 

分 类 号：O469[理学—凝聚态物理]