摘要
The grain boundary phase affects the magnetic properties and corrosion resistance of sintered NdFeB magnets.In this work,a small amount of In was added to NdFeB magnets by induction melting to systematically investigate its effect on the evolution of the microstructure,magnetic properties and corrosion resistance of NdFeB magnets.Microstructural analysis illustrated that minor In addition generated more grain boundary phases and an abundant amorphous phase at the triple-junction grain boundary.While the addition of In failed to enhance the magnetic isolation effect between adjacent matrix grains,its incorporation fortuitously elevated the electrochemical potential of the In-containing magnets.Besides,during corrosion,an In-rich precipitate phase formed,hindering the ingress of the corrosive medium into the magnet.Consequently,this significantly bolstered the corrosion resistance of the sintered NdFeB magnets.The phase formation,magnetic properties and corrosion resistance of In-doped NdFeB magnets are detailed in this work,which provides new prospects for the preparation of high-performance sintered NdFeB magnets.
作者
李豫豪
范晓东
贾智
范璐
丁广飞
刘新才
郭帅
郑波
曹帅
陈仁杰
闫阿儒
Yuhao Li;Xiaodong Fan;Zhi Jia;Lu Fan;Guangfei Ding;Xincai Liu;Shuai Guo;Bo Zheng;Shuai Cao;Renjie Chen;Aru Yan(School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China;CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;University of Chinese Academy of Sciences,Beijing 100049,China)
基金
funded by Ningbo Key R&D Plan and“Unveiling and Leading”(Grant No.2023Z093)
Ningbo Science and Technology Innovation 2025 Major Special Project(Grant No.2022Z106)
Hezhou City Central Leading Local Science and Technology Development Special Fund Project(Grant No.HK ZY2022002).
