Grain boundary optimization induced substantial squareness enhancement and high performance in iron-rich Sm-Co-Fe-Cu-Zr magnets  

作　　者：Jun Cao Tianli Zhang Jinghua Liu Hao Xu Mingyao Hu Wei Xia Ao Wang Hui Wang Chengbao Jiang 

机构地区：[1]School of Materials Science and Engineering,Beihang University,Beijing 100191,China

出　　处：《Journal of Materials Science & Technology》2021年第26期56-61,共6页材料科学技术（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2018YFB2003901);NSFC-BRICS(No.51761145026);NSFC(Nos.91960101 and 51520105002)。

摘　　要：Increasing iron content has been witnessed an essential method to improve the remanence of 2:17-type Sm-Co-Fe-Cu-Zr magnets,however,the inferior squareness factor accompanied with the increased iron content turns into a neck sticking problem.In this work,the grain boundary optimization induced substantial squareness enhancement from 63.4%to 91.4%,and consequently an excellent maximum energy product of 32.63 MGOe have been achieved in iron-rich Sm-Co-Fe-Cu-Zr magnets via tuning solution process.It is clearly revealed that the grain boundary(GB)phases as well as the micro-twins’density in grain interiors can be controlled and interprets the enhancement mechanism of squareness.

关 键 词：Iron-rich Sm-Co-Fe-Cu-Zr magnet Grain boundary SQUARENESS 

分 类 号：TM273[一般工业技术—材料科学与工程]