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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:
1532004
Patent Number(s):
9,715,957
Application Number:
14/766,101
Assignee:
Regents of the University of Minnesota (Minneapolis, MN)
DOE Contract Number:  
AR0000199
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014-02-06
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Wang, Jian-Ping, and Jiang, Yanfeng. Iron nitride permanent magnet and technique for forming iron nitride permanent magnet. United States: N. p., 2017. Web.
Wang, Jian-Ping, & Jiang, Yanfeng. Iron nitride permanent magnet and technique for forming iron nitride permanent magnet. United States.
Wang, Jian-Ping, and Jiang, Yanfeng. Tue . "Iron nitride permanent magnet and technique for forming iron nitride permanent magnet". United States. https://www.osti.gov/servlets/purl/1532004.
@article{osti_1532004,
title = {Iron nitride permanent magnet and technique for forming iron nitride permanent magnet},
author = {Wang, Jian-Ping 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 = {2017},
month = {7}
}

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Works referenced in this record:

Magnetic recording medium containing particles with a core containing a Fe16N2 phase
patent, July 2007


Method for producing iron-nitride powders
patent, July 1994


Magnetic powder, permanent magnet produced therefrom and process for producing them
patent, October 2000


Object consolidation employing friction joining
patent, October 2002


Method of improving magnetic devices by applying AC or pulsed current
patent, July 1991


Magnetic material and production method thereof
patent, November 2001


R-Fe-B magnet alloy, isotropic bonded magnet and method of producing same
patent, September 1995


Process for the production of an anisotropic magnetic material based upon the Sm-Fe-N system
patent, August 1992


    Works referencing / citing this record:

    Rare-earth nanocomposite magnet
    patent, October 2018


    Applied magnetic field synthesis and processing of iron nitride magnetic materials
    patent, June 2018