Effect of antioxidants on the efficiency of jet milling and the powder characteristics of Sm2Co17 permanent magnets  

作　　者：Da-Shuai Xu Lei Liu Jian-Hui Yuan Bo Zhou Chuang-Hui Dong Feng-Qing Wang Yong Ding Ying-Li Sun A-Ru Yan 许大帅;刘雷;袁建辉;周波;董创辉;王凤青;丁勇;孙颖莉;闫阿儒(School of Materials Science and Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets,CAS Key Laboratory ofMagnetic Materials and Devices,Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,NingboInstitute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]School of Materials Science and Engineering,Shanghai University of Engineering Science,Shanghai 201620,China [2]CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets,CAS Key Laboratory of Magnetic Materials and Devices,Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics B》2024年第9期615-620,共6页中国物理B（英文版）

基　　金：the National Key R&D Program of China(Grant No.2021YFB3803003);the Youth Innova-tion Promotion Association of Chinese Academy of Sciences(Grant No.2023311);Zhejiang Public Welfare Technology Application Research Project(Grant No.LGG22E010013);Class III Peak Discipline of Shanghai-Materials Science and Engineering(High-Energy Beam Intelligent Processing and Green Manufacturing).

摘　　要：This study investigated the effect of antioxidants on the grinding efficiency,magnetic powder characteristics,microstructure,and magnetic properties of 2:17 type SmCo permanent magnet materials.The results show that adding antioxidants helps improve the dispersion among magnetic powders,leading to a 33.3%decrease in jet milling time and a 15.8%increase in magnet powder production yield.Additionally,adding antioxidants enhances the oxidation resistance of the magnetic powders.After being stored in a constant temperature air environment at 25C for 48 h,the O content in the powder decreased by 33%compared to samples without antioxidants.While in the magnet body,the O content decreased from 0.21 wt.%to 0.14 wt.%,which helps increase the effective Sm content and domain wall pinning uniformity in the magnet.Excellent magnetic properties were obtained in the magnet with added antioxidants:B_(r)=11.6 kGs,SF=79.6%,H_(cj)=16.8 kOe,and(BH)_(max)=32.5 MGOe.

关 键 词：ANTIOXIDANT SmCo permanent magnet oxidation resistance grinding efficiency 

分 类 号：TM273[一般工业技术—材料科学与工程]