2∶17型SmCo基永磁材料的研究进展

Research Progress of 2∶17-type SmCo-based Permanent Magnet Material

摘要

2∶17型SmCo基永磁材料因其优异的内禀磁性能、独特的纳米胞状结构及元素梯度分布特征,展现出极高的矫顽力和稳定的剩磁温度特性,在航空航天、精密仪器及国防工业等领域具有重要应用价值。近年来,随着相关领域技术升级,对磁体的温度稳定性和综合性能提出了更高要求。系统综述了该材料在高磁能积、低温度系数及高温服役性能方面的研究进展,重点分析了时效处理过程中微结构演变规律与变温矫顽力机制,并对未来发展方向进行了展望。

Abstract

2∶17-type SmCo permanent magnets, characterized by their excellent intrinsic magnetic properties, unique nano-cellular structure, and element gradient distribution, exhibit remarkably high coercivity and stable remanence temperature characteristics, and hold significant application value in aerospace, precision instruments, and defense industries. In recent years, with the technological upgrades in related fields, higher demands have been placed on the temperature stability and overall performance of magnets. This review systematically summarizes the research progress of the material in terms of high magnetic energy product, low temperature coefficient, and high-temperature service performance, with a focus on analyzing the microstructural evolution during aging treatment and the temperature-dependent coercivity mechanism. Future development directions are also discussed.

关键词

SmCo基永磁材料 / 温度稳定性 / 微结构 / 矫顽力机制 / 高温服役 / 剩磁

Key words

SmCo-based permanent magnet / thermal stability / microstructure / coercivity mechanism / high temperature service / remanent magnetization

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基金资助

国家自然科学基金资助项目(51931007)

国家自然科学基金资助项目(51871005)

北京市教委科技发展项目(KZ202010005009)