添加Dy、Al对机械合金化NdFeB永磁体的作用  

Role of Dy,Al Addition on Mechanical Alloying NdFeB Permanent Magnets

作　　者：魏茂彬[1] 于万秋[1] 华中[1] 

机构地区：[1]吉林师范大学物理学院,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2010年第4期66-68,共3页Journal of Jilin Normal University:Natural Science Edition

基　　金：四平市科技发展计划项目(2008023)

摘　　要：研究添加Dy、Al对NdFeB永磁体结构和磁性能的影响,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和振动样品磁强计(VSM)研究样品不同球磨时间的显微结构及其磁性能.结果表明,在一定条件下Dy取代部分Nd可以细化晶粒,改善了合金的显微组织,提高合金的内禀矫顽力.Adding Dy,Al powder into NdFeB and then preparing the sintered NdFeB magnets,the effect of Dy,Al powder on microstructure of the sintered NdFeB magnets was studied.The microstructure and magnetism of the alloy are investigated by XRD,SEM and VSM.The result shows that the dysprosium replacing part of the neodymium can refine the grain and improve the microstructure of the alloy and the alloy′s intrinsic coercivity under certain conditions.

关 键 词：机械合金化 α-Fe相 磁性能 矫顽力 

分 类 号：TM273[一般工业技术—材料科学与工程]