Effect of Pr-Ga dual-alloys diffusion on magnetic properties and thermal stability of hot-deformed PrNd-Fe-B magnets  

作　　者：Longquan Hou Jinyun Ju Wenzong Yin Xu Tang Renjie Chen Ailin Xia Yeyuan Du Ruihua Du Aru Yan 

机构地区：[1]Anhui Key Laboratory of Metal Materials and Processing,School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243002,China [2]Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Rare Earths》2022年第3期457-461,I0004,共6页稀土学报（英文版）

基　　金：Project supported by the Ningbo Science and Technology Major Project(Gr2017B10002,2019B10093);the National Natural Science Foundation of China(51671207);the Zhejiang Province Technology Application Research Project(LGG19E010001)。

摘　　要：To investigate the influence of the addition of Pr-Ga alloys on magnetic properties and morphology of materials,the hot-deformed PrNd-Fe-B magnets were prepared by the addition of Pr-Ga alloys using a dual-alloys diffusion.The room-temperature coercivity of the hot-deformed PrNd-Fe-B magnets increases substantially from 1.68 to 2.34 T,while the remanence decreases from 1.42 to 1.24 T,by the addition of 5 wt%Pr-Ga alloys.Moreover,the thermal stability of coercivity improves from-0.46%/℃to-0.42%/℃.Two types of grain boundary phases(PrNd-rich and PrNd-Ga-rich)are generated at grain boundaries by microstructural analysis,resulting in the decrease of Fe element concentration from more than 60%to about 10%at grain boundaries.The decrease of ferromagnetic element concentration at grain boundaries and the refinement of grain are considered to be the main reasons for the improvement of coercivity and thermal stability.

关 键 词：Hot-deformed PrNd-Fe-B Dual-alloys diffusion Magnetic properties Rare earths 

分 类 号：TG132.27[一般工业技术—材料科学与工程]