各向异性HDDR工艺Nd(Fe,Co)B粘结磁体的反磁化过程和矫顽力  

Demagnetization and the Coercivity for Nd(Fe,Co)B Bonded Magnets Made from HDDR Anisotropic Powders

作　　者：高汝伟[1] 孟宪洪 张永军 张建成[1] 

机构地区：[1]山东大学物理系,山东济南250100 [2]山东省冶金科学研究院,山东济南250014

出　　处：《功能材料》2000年第2期134-135,共2页Journal of Functional Materials

基　　金：国家自然科学基金;山东省自然科学基金

摘　　要：研究了取向磁场对HDDR工艺制备的各向异性Nd(Fe ,Co)B粘结磁体矫顽力的影响。实验指出 :随着施加取向磁场强度的逐渐增强 ,磁体的剩磁和矫顽力均有不同程度的增加。磁体的反磁化过程包括晶粒内部的成核过程和晶粒之间的畴壁位移过程 ,矫顽力应由两种反磁化过程的共同作用决定。The dependence of coercivity for Nd(Fe,Co)B bonded magnets made from HDDR anisotropic powders on the alignment magnetic field is studied.The experiments express that applying an alignment magnetic field while the powders are bonded,both remanence and coercivity of the magnet are increased in different degrees with strengthening alignment field.The demagnetization process of the magnet can be classified as the nucleaiton process inside the grains and the domain-wall displacement between the grains.The coercivity of the magnet should be determined by the collective effects of two processes.

关 键 词：HDDR 粘结磁体 反磁化过程 矫顽力 永磁材料 

分 类 号：TM273[一般工业技术—材料科学与工程]