[1]周相龙,袁涛,宋欣,等.高磁能积2∶17型钐钴永磁材料的新进展[J].中国材料进展,2020,(05):364-372.[doi:10.7502/j.issn.1674-3962.201912013]
　ZHOU Xianglong,YUAN Tao,SONG Xin,et al.Recent Progress in High Energy Product 2∶17-Type Sm-Co-Based Permanent Magnets[J].MATERIALS CHINA,2020,(05):364-372.[doi:10.7502/j.issn.1674-3962.201912013]
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高磁能积2∶17型钐钴永磁材料的新进展()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2020年第05期
页码:
364-372
栏目:
出版日期:
2020-05-30

文章信息/Info

Title:
Recent Progress in High Energy Product 2∶17-Type Sm-Co-Based Permanent Magnets
文章编号:
1674-3962(2020)05-0364-09
作者:
周相龙1; 袁涛1; 2; 宋欣1; 贾文涛1; 马天宇1
（1.西安交通大学前沿科学技术研究院，陕西 西安 710049） (2. 西南应用磁学研究所，四川 绵阳 621000)
Author(s):
ZHOU Xianglong1; YUAN Tao1; 2; SONG Xin1; JIA Wentao1; MA Tianyu1
（1. Frontier Institute of Science and Technology，Xian Jiaotong University，Xian 710049，China）（2. Southwest Institute of Applied Magnetics, Mianyang 621000, China）
关键词:
永磁材料; 钐钴永磁; 磁能积; 微结构
Keywords:
permanent magnets; Sm-Co permanent magnets; magnetic energy product; microstructure
分类号:
TM273
DOI:
10.7502/j.issn.1674-3962.201912013
文献标志码:
A
摘要:
2∶17型Sm-Co-Fe-Cu-Zr磁体是磁性最强的高温永磁材料，在高技术和国防领域具有重要应用。研究表明，通过提高Fe含量可获得更高的理论磁能积。因此，研制富Fe的高磁能积磁体不仅可以进一步缩小装备体积，还能显著降低生产成本，是当前钐钴永磁领域的一个重要发展方向。从高磁能积钐钴磁体面临的磁性能瓶颈出发，概述了富Fe磁体的研究新进展。针对提高Fe含量难以形成完整的纳米胞状组织这一根源，国内外发展了氢破碎和气流磨等制粉技术，以及中间热处理和预时效、多级时效处理、双合金等微结构调控技术，推动了高磁能积钐钴的研发。目前报道的2∶17型钐钴永磁材料最高磁能积已超过35 MGOe，国内已成功研制出最大磁能积>30 MGOe、矫顽力>30 kOe的高性能烧结磁体。最后，对进一步所要解决的基础问题进行了展望。
Abstract:
The 2∶17-type Sm-Co-Fe-Cu-Zr magnets are the strongest high temperature permanent magnets, which have been found wide applications in high-technologies and national defense. Early invesitgations have shown that raising Fe content can allow magnets obtain higher theoretical energy product. Therefore, the development of Fe-rich magnets with higher maximum energy product can not only facilitate the utilizations in more miniaturized magnet-associated devices, but also significantly reduce the production cost, which has been one of the important directions in the field of Sm-Co-based permanent magnets. In this work, based on the magnetic performance bottleneck for fabricating high energy product Sm-Co-based magnets, we briefly summarize the recent research advances of the Fe-rich magnets. Focusing on the origin that it is difficult to form complete nanocellular structure in Fe-rich magnets, new approaches have been developed to enhance their magnetic properties, including the new powder fabrication technologies such as hydrogen crushing and jet milling, the new heat-treating procedures including intermediate heat treatment, pre-aging, and multi-stage aging treatment, and the dual-alloy technology to opitimze the cellular nanostructure. With these new technoclogies, the obtained maximum energy product has exceeded 35 MGOe. High-performance sintered magnets with maximum energy product above 30 MGOe and coercivity above 30 kOe have also been successfully developed in China. Based on these advances, the fundamental issues to be solved to develop magnets with higher magnetic performance are also suggested.

备注/Memo

备注/Memo:
收稿日期：2019-12-22修回日期：2020-02-14 基金项目：国家自然科学基金项目（51871174）；金属材料强度国家重点实验室开放课题（20192106）第一作者：周相龙，男，1990年生，博士研究生通讯作者：马天宇，男，1978年生，教授，博士生导师， Email:matianyu@xjtu.edu.cn
更新日期/Last Update: 2020-04-27