Magnetic properties enhancement of hot-deformed NdFeB magnets by two different methods of CeNdCu diffusion

作     者：Guibing Shi Zilong Wang Xinyuan Bai Wenlong Yan Yang Luo Dunbo Yu Guibing Shi;Zilong Wang;Xinyuan Bai;Wenlong Yan;Yang Luo;Dunbo Yu

作者机构：National Engineering Research Center for Rare Earth MaterialsGRINM Group Co.Ltd.Beijing 100088China GRIREM Advanced Materials Co.Ltd.Beijing 100088China General Research Institute for Nonferrous MetalsBeijing 100088China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2020年第38卷第12期

页      面：1312-1316页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Project supported by the National Key Research and Development Program of China(2016YFB0700902) the Major Science and Technology Projects in Hebei Province(19041029Z) We are also grateful to the financial support from the Youth Fund Project of GRINM 

主　　题：Hot-deformed magnet Coating Mixing CeNdCu Rare earths 

摘      要：Two different ways were used to control the distribution of cerium for the enhancement of *** was by coating CeNdCu in the prepared magnet and annealing to make CeNdCu diffuse into the grain boundary to increase the coercivity,the other was by mixing CeNdCu with initial magnetic powders and then preparing the hot-deformed *** SEM-EDS result indicates that cerium diffuses more easily into the main phase by the mixing way,while cerium is mainly distributed in the grain boundary via the coating *** heat-treatment process may be one of the dominant influencing factors for the distribution of Ce,Multi-steps heat treatment in the mixing way,consisting of hot-pressing,hot-deforming and post heat process,easily introduces Ce into the main phase Nd2 Fe14B,which forms the Ce2 Fe14B shell resulting in the decrease of *** the coating way can ensure uniform dispersion of Ce in the grain boundary,which leads to the high coercivity.