首页|Effect of In doping on the evolution of microstructure,magnetic properties and corrosion resistance of NdFeB magnets

Effect of In doping on the evolution of microstructure,magnetic properties and corrosion resistance of NdFeB magnets

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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.

In-dopingNdFeB magnetsmagnetic propertiescorrosion resistance

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

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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

Ningbo Key Research and Development Plan and"Unveiling and Leading"Ningbo science and Technology Innovation 2025 Major Special ProjectHezhou City Central Leading Local Science and Technology Development Special Fund Project

2023Z0932022Z106HK ZY2022002

2024

10.1088/1674-1056/ad0e5c

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(3)
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