Coercivity Enhancement of the Sintered Nd-Fe-B Magnet with Intergranular Multi-Addition

作     者：LIANG Xiaolin YAN Gaolin 

作者机构：School of Physics and TechnologyWuhan University 

出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报（自然科学英文版）)

年 卷 期：2016年第21卷第2期

页      面：165-170页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China(51172168,51072139) the National Basic Research Program of China(973 Program)(2014DFB50130,2011CB612304) 

主　　题：rare earth permanent magnet coercivity intergranular adding process 

摘      要：In order to improve the coercivity of the sintered Nd-Fe-B magnet,a Nd13.5Fe79.75B6.75magnet with intergranular multi-addition of 2%Dy H3,2%Nd H3and 1%Nd2O3is prepared and its magnetic property and microstructure are *** results show that the coercivity of the magnet with multi-addition is as high as 1 300 k A/m,while that of the magnets with Dy H3and Nd2O3are 520 k A/m and 850 k A/m,*** electron microscope（SEM）shows that the grain boundaries in the magnet with multi-addition are smoother and the grain size is smaller than that in the magnet without the *** with addition of Dy H3or Nd2O3,the multi-addition can more effectively enhance coercivity of the *** adding process with multi-addition can both increase the anisotropy field and optimize the grain-boundary microstructure of the *** a result,the coercivity of the magnet is significantly increased.