首页|Effect of antioxidants on the efficiency of jet milling and the powder characteristics of Sm2Co17 permanent magnets
Effect of antioxidants on the efficiency of jet milling and the powder characteristics of Sm2Co17 permanent magnets
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This study investigated the effect of antioxidants on the grinding efficiency,magnetic powder characteristics,mi-crostructure,and magnetic properties of 2∶17 type SmCo permanent magnet materials.The results show that adding an-tioxidants 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 25 ℃ 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:Br=11.6 kGs,SF=79.6％,Hcj=16.8 kOe,and(BH)max=32.5 MGOe.
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 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
University of Chinese Academy of Sciences,Beijing 100049,China
National Key R&D Program of ChinaYouth Innovation Promotion Association of Chinese Academy of SciencesZhejiang Public Welfare Technology Application Research ProjectClass Ⅲ Peak Discipline of Shanghai-Materials Science and Engineering(High-Energy Beam Intelligent Processing and Green Manufact
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