2：17型SmCo稀土永磁材料的研究现状与趋势

Review of Research on 2:17 Type SmCo Rare Earth Permanent Magnets

摘要:

2：17型SmCo永磁材料主要有4种类型的磁体：高温磁体、超低温度系数的磁体、辐射取向和辐射多极取向环行磁体、高电绝缘磁体。介绍了其制造方法，主要是粉末冶金(烧结)法、还原扩散法和快淬-粘结法；描述了磁体的胞状显微组织结构和成分对结构的影响：总结了其矫顽力机理，特别是高温下的矫顽力机制；并对该永磁材料的今后研究趋势作了评述。

Abstract:

Research and development of 2:17 type SmCo permanent magnets are reviewed. Considered are four magnets types : high temperature magnets, super-low temperature coefficient magnets, the radially oriented and multi-polar rings, high electricity insulation magnets. Manufacturing techniques described include: powder metallurgy (sintering), reverting-diffuse and quenching-bonding. The cellular microstructure was characterized, and the effects of components on microstructure were discussed. The coercivity mechanism over a wide temperature range was considered and directions for future research discussed.