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

Abstract

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.

Inventors:
;
Issue Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1651061
Patent Number(s):
10692635
Application Number:
15/622,785
Assignee:
Regents of the University of Minnesota (Minneapolis, MN)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B22 - CASTING B22D - CASTING OF METALS
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
DOE Contract Number:  
AR0000199
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/14/2017
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wang, Jianping, and Jiang, Yanfeng. Iron nitride permanent magnet and technique for forming iron nitride permanent magnet. United States: N. p., 2020. Web.
Wang, Jianping, & Jiang, Yanfeng. Iron nitride permanent magnet and technique for forming iron nitride permanent magnet. United States.
Wang, Jianping, and Jiang, Yanfeng. Tue . "Iron nitride permanent magnet and technique for forming iron nitride permanent magnet". United States. https://www.osti.gov/servlets/purl/1651061.
@article{osti_1651061,
title = {Iron nitride permanent magnet and technique for forming iron nitride permanent magnet},
author = {Wang, Jianping and Jiang, Yanfeng},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 23 00:00:00 EDT 2020},
month = {Tue Jun 23 00:00:00 EDT 2020}
}

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