Influence of Pr-Al-Co alloy diffusion source on magnetic properties and microstructure of sintered Nd-Fe-B magnets processed by grain boundary diffusion

作     者：Lei Jin Jinhao Zhu Guangfei Ding Zhehuan Jin Bo Zheng Xuejing Cao Shuai Guo Renjie Chen Aru Yan Lei Jin;Jinhao Zhu;Guangfei Ding;Zhehuan Jin;Bo Zheng;Xuejing Cao;Shuai Guo;Renjie Chen;Aru Yan

作者机构：Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Material Technologyand EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of SciencesBeijing 100049China 

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

年 卷 期：2022年第40卷第12期

页      面：1885-1893,I0003页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by Key R&D Program of Zhejiang Province(2021C01190) Major Project of"Science and Technology Innovation 2025"in Ningbo City(2020Z046) Ningbo Natural Science Foundation(202003N4353) Key Research and Development Program of Shandong Province(2019JZZY010321) Inner Mongolia Major Technology Project(2019ZD020) National Natural Science Foundation of China(52101238) Kunpeng Project in Zhejiang Province 

主　　题：Nd-Fe-B Coercivity Pr-AI-Co alloys Grain boundary diffusion Rare earths 

摘      要：In this study,the influence of the content of Al and Co in the diffusion source on the magnetic performance and microstructure of the diffused magnet was studied by grain boundary diffusion treatment with Pr_(70)Al_(30-x)Co_(x)(x=0 at%,10 at%,15 at%,20 at%,30 at%)*** the Co content in the diffusion source increases from 0 at%to 10 at%,the coercivity enhancement in the Pr_(70)Al_(20)Co_(10)diffused magnet is the highest,increased from 1.62 to 2.24 T,higher than 2.01 T of the Pr_(70)Al_(30)diffused *** further increase of Co content in the diffused source,the coercivity of the diffused magnet decreases gradually,the coercivity of Pr_(70)Al_(15)Co_(15),Pr_(70)Al_(20)Co_(10)and Pr_(70)Co_(30)diffused magnet is 2.15,1.99 and1.81 T,*** analysis shows that plenty of continuous grain boundary phases(CGBPs)can be formed in the Pr_(70)Al_(20)Co_(10)diffused magnet under the synergistic effect of Al and Co,which leads to the enhancement of magnetic isolation between more adjacent ***,the amount of CGBP in the diffused magnets gradually decreases with the further increase of Co content in the diffusion source.