钕铁硼电泳法晶界扩散渗镝研究  

Grain Boundary Diffusion of Dysprosium Nd-Fe-B Sintered Magnet with Electrophoretic Deposition

作　　者：李建[1,2] 王琳[1] 周磊[1] 喻晓军[1] 李波 

机构地区：[1]北京安泰科技股份有限公司功能材料事业部,北京101318 [2]中国钢研科技集团有限公司,北京100081

出　　处：《中国稀土学报》2013年第3期275-281,共7页Journal of the Chinese Society of Rare Earths

基　　金：安泰科技重大技术创新项目(2012JA01GGN)资助

摘　　要：采用电泳法在钕铁硼磁体表面形成富含重稀土元素Dy附着层,高温扩散处理后磁体性能提高。XRD和DSC测试结果表明:在磁体表面附着层内富含重稀土元素Dy,SEM和EPMA分析测试结果说明高温处理后,表面电泳附着层转化为Dy2O3,并与磁体内Nd元素发生取代反应;取代生成的重稀土元素Dy沿晶界扩散致使磁性能提高。这种方法简单可行,为晶界扩散渗Dy工程应用提供了新的途径。With electrophoretic deposition, Dy corn- pound coating layer was formed on the surface of the Nd-Fe-B sintered magnet. The coercivity of the coat- ing treated magnet increased with the subsequent high temperature diffusion treatment. The results of the XRD and DSC analysis confirmed that the coating lay- er is rich in heavy rare earth Dy. SEM and EPMA a- nalysis revealed the coating layer transferred into Dy203 composition, and Dy layer was substituted by the element in the coating light rare earths of the magnet. Subsequent grain boundary diffusion of Dy enabled enhancement of magnetic properties. Dy com- pound electrophoretic deposition method is simple and practical, providing a new possibility for mass produc- tion of Dy diffusion treated magnets.

关 键 词：电泳 晶界扩散 磁性能 显微结构 稀土 

分 类 号：TM273[一般工业技术—材料科学与工程]