Concurrent improvements in coercivity and corrosion resistance for Nd6Fe13Ga-reconstructed Nd-Fe-B sintered magnets

被引:0
作者
Shen, Rui [1 ]
Xu, Shuainan [1 ]
Wang, Congyi [2 ]
Yang, Enxiang [3 ]
Liu, Xiaolian [1 ,3 ]
Fu, Song [1 ,2 ]
Jin, Weiyang [3 ]
Pan, Yu [1 ]
Zhao, Lizhong [1 ]
Guan, Pengfei [4 ]
Zhang, Xuefeng [1 ]
机构
[1] Hangzhou Dianzi Univ, Inst Adv Magnet Mat, Coll Mat & Environm Engn, Hangzhou 310018, Peoples R China
[2] Zhejiang Innuovo Magnet Co Ltd, Jinhua 322118, Zhejiang, Peoples R China
[3] Ningbo Permanent Magnets Co Ltd, Ningbo 315032, Peoples R China
[4] Beijing Computat Sci Res Ctr, Beijing 100193, Peoples R China
基金
中国国家自然科学基金;
关键词
GRAIN-BOUNDARY PHASE; RARE-EARTH-FREE; GA; CO; CU; MICROSTRUCTURE; ENHANCEMENT; DEPENDENCE; EXCHANGE; BEHAVIOR;
D O I
10.1039/d4tc04062g
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The grain boundary phase with the chemical composition Nd6Fe13Ga in Nd-Fe-B sintered magnets has been the subject of considerable research interest due to its role in optimizing grain boundaries; however, it also presents a novel challenge regarding corrosion behavior. In this study, the regulation mechanism of Nd6Fe13Ga grain boundary-reconstructed magnets with concurrent improvements in coercivity and anti-corrosive properties was investigated. Results indicated that the formed non-ferromagnetic Nd6Fe13Ga phase and the modified Cu-rich continuous grain boundaries after Nd6Fe13Ga reconstruction contributed to the promotion of magnetic isolation and a reduction in the corrosion potential difference with the 2:14:1 phase. The underlying mechanisms of the corrosion behavior were further elucidated through in situ microstructural characterization and first-principles calculations of electron work functions for different phases. This study proposes an effective solution to enhance the magnetic properties and anti-corrosion simultaneously in Nd-Fe-B sintered magnets.
引用
收藏
页码:373 / 384
页数:12
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