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

许大帅 ¹刘雷 ²袁建辉 ¹周波 ³董创辉 ³王凤青 ²丁勇 ²孙颖莉 ²闫阿儒²

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作者信息

1. 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
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;University of Chinese Academy of Sciences,Beijing 100049,China
3. 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
折叠

Abstract

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.

Key words

antioxidant/SmCo permanent magnet/oxidation resistance/grinding efficiency

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基金项目

National Key R&D Program of China(2021YFB3803003)

Youth Innovation Promotion Association of Chinese Academy of Sciences(2023311)

Zhejiang Public Welfare Technology Application Research Project(LGG22E010013)

Class Ⅲ Peak Discipline of Shanghai-Materials Science and Engineering(High-Energy Beam Intelligent Processing and Green Manufact()

出版年

2024

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

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