高丰度稀土永磁体晶界渗透技术研究  

Research Progress of High-Abundance Rare Earth Permanent Magnets Prepared by Grain Boundary Penetration

作　　者：余效强 胡宇霆 钟震晨[1,2] Yu Xiaoqiang;Hu Yuting;Zhong Zhenchen(Jiangxi Key Laboratory for Rare Earth Mag-netic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices(IREMMD),College of Rare Earths,Jiangxi University of Science and Technology,Ganzhou 341000,China;Key Laboratory of Development and Application of Ionic Rare Earth Resources,Ministry of Education,Ganzhou 341000,China)

机构地区：[1]江西理工大学稀土学院,江西省稀土磁性磁材料及器件重点实验室/稀土磁性磁材料及器件研究所,江西赣州341000 [2]离子型稀土资源开发及应用教育部重点实验室,江西赣州341000

出　　处：《中国稀土学报》2023年第2期200-213,共14页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(52102334,52061015);江西省自然科学基金项目(20202BAB214003);江西理工大学博士启动基金项目(205200100110);江西省教育厅项目(GJJ190478);赣州市科技计划项目(204301000105)资助。

摘　　要：钕铁硼磁体不断应用于高新领域,给中国稀土永磁产业提供了更广阔的发展空间。但稀土镨钕大量消耗,共伴生的镧、铈等高丰度稀土元素却大量堆积。研究发现,镧、铈、钇等高丰度稀土磁体能部分替代钕铁硼磁体,不仅减少镨钕的消耗,而且将稀土资源平衡利用。鉴于高丰度稀土磁体磁性能低而不能直接应用到实际生活中的原因,科研工作者展开一系列研究。结果表明:用低成本晶界渗透技术能进一步提高高丰度稀土磁体的磁性能。一方面,能尽量多使用高丰度稀土,且少使用中重稀土;另一方面,过多使用高丰度稀土元素渗透,对磁体剩磁影响不大,利于优化磁体综合磁性能。本文主要介绍晶界渗透纳米晶和微米晶高丰度稀土永磁体的研究现状。Nd-Fe-B magnets have been widely used in high and modern fields,which promotes the development of rare earth permanent magnetic industries in China.However,it results in excessive consumption of praseodymium and neodymium and the concomitant high-abundance rare earth elements have been overstocked,such as lanthanum(La),cerium(Ce).Researches show that the high-abundance rare earth permanent magnets prepared by La,Ce and yttrium(Y)can be potential alternatives of Nd-Fe-B magnets,so that the resource of praseodymium and neodymium can be saved.Simultaneously,the precious rare earth resources are balanced and effectively utilized.Considering the low magnetic properties of high-abundance rare earth magnets and their practical application in our life,a series of studies was carried out by researchers.The results show that the magnetic properties of high-abundance rare earth magnets can be further improved by grain boundary penetration technology,of which the cost is lower.On the one hand,high-abundance rare earth resources can be used as much as possible,and medium/heavy rare earth resources can be used less.On the other hand,the remanence of magnets will not be abnormal decreased by penetrating excessive high-abundance rare earth elements,which can optimize their overall magnetic properties.This article summarizes the recent researches on high-abundance rare earth permanent magnets with nano-sized and micro-sized grains after grain boundary penetration.

关 键 词：钕铁硼永磁体 高丰度稀土 晶界渗透 

分 类 号：TM273[一般工业技术—材料科学与工程]