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Title: Iron nitride permanent magnet and technique for forming iron nitride permanent magnet

Patent ·
OSTI ID:1651061
;

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.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AR0000199
Assignee:
Regents of the University of Minnesota (Minneapolis, MN)
Patent Number(s):
10,692,635
Application Number:
15/622,785
OSTI ID:
1651061
Resource Relation:
Patent File Date: 06/14/2017
Country of Publication:
United States
Language:
English

References (41)

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