铜业工程Issue(2)：54-60,7.DOI:10.3969/j.issn.1009-3842.2024.02.008
晶界扩散中Tb对烧结NdFeB磁体微观组织和磁性能的影响
Micro-structure and Magnetic Properties of Sintered NdFeB Magnets With Ad-dition of Tb during Grain Boundary Diffusion
摘要
Abstract
Improving the coercivity of sintered NdFeB magnets through grain boundary diffusion technology has been widely used.In or-der to study the effect of magnetic powder diffusion source containing heavy rare earth metals on the comprehensive performance of NdFeB magnets,the composite diffusion source containing magnetic powder was used,in which the mass proportion of Tb was 6.0%.The mass proportion of the magnetic powder in the composite diffusion source were 20%,40%,60%,and 80%,respectively.The re-sults show that when the mass proportion of the main diffusion source(magnetic powder)is 60%,the maximum coercivity of the dif-fused magnet,Nd40Tb60,reaches 21.52 kOe,which realized a significant increment.After analysis by micro-structure and XRD charac-terization,it was found that the heavy rare earth of Tb diffused into the interior of the magnet through the grain boundary phase,which also resulted in the lattice substitution reaction.The formation of(Nd,Dy/Tb)2Fe14B phase with stronger magnetic crystal anisotropy field,significantly enhanced the coercivity of the magnet.The coercivity of the diffused magnets,Nd80Tb20,Nd60Tb40 and Nd20Tb80 were weakly improved,in which the coercivity of Nd80Tb20 was 19.60 kOe and the mass proportion of the main diffusion source were 20%,40%,and 80%,respectively.关键词
烧结钕铁硼/晶界扩散/磁耦合/扩散源/磁性能Key words
sintered NdFeB/grain bound diffusion/magnetic coupling/diffusion source/magnetic properties分类
信息技术与安全科学引用本文复制引用
王志恒,刘乔波,曹俊,李仲,朱利强,王舒远,刘延丰,熊俊杰..晶界扩散中Tb对烧结NdFeB磁体微观组织和磁性能的影响[J].铜业工程,2024,(2):54-60,7.基金项目
江西省赣鄱俊才支持计划项目(20232BCJ23056) （20232BCJ23056）
江铜集团一级科研项目(YJY2021014)资助 （YJY2021014）
