发明名称 |
IRON NITRIDE PERMANENT MAGNET AND TECHNIQUE FOR FORMING IRON NITRIDE PERMANENT MAGNET |
摘要 |
A bulk permanent magnetic material may include between about 5 volume percent and about 40 volume percent Fe16N2 phase domains, a plurality of nonmagnetic atoms or molecules forming domain wall pinning sites, and a balance soft magnetic material, wherein at least some of the soft magnetic material is magnetically coupled to the Fe16N2 phase domains via exchange spring coupling. In some examples, a bulk permanent magnetic material may be formed by implanting N+ ions in an iron workpiece using ion implantation to form an iron nitride workpiece, pre-annealing the iron nitride workpiece to attach the iron nitride workpiece to a substrate, and post-annealing the iron nitride workpiece to form Fe16N2 phase domains within the iron nitride workpiece. |
申请公布号 |
EP2954540(A2) |
申请公布日期 |
2015.12.16 |
申请号 |
EP20140749390 |
申请日期 |
2014.02.06 |
申请人 |
REGENTS OF THE UNIVERSITY OF MINNESOTA |
发明人 |
WANG, JIAN-PING;JIANG, YANFENG |
分类号 |
H01F1/047;H01F1/08;H01F41/02 |
主分类号 |
H01F1/047 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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