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Title: Method of making iron nitride powder with anisotropic shape

Abstract

Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one a″-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one a″-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.

Inventors:
;
Issue Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1632557
Patent Number(s):
10562103
Application Number:
15/546,359
Assignee:
Regents of the University of Minnesota (Minneapolis, MN)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
DOE Contract Number:  
AR0000199
Resource Type:
Patent
Resource Relation:
Patent File Date: 01/22/2016
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Jian-Ping, and Jiang, YanFeng. Method of making iron nitride powder with anisotropic shape. United States: N. p., 2020. Web.
Wang, Jian-Ping, & Jiang, YanFeng. Method of making iron nitride powder with anisotropic shape. United States.
Wang, Jian-Ping, and Jiang, YanFeng. Tue . "Method of making iron nitride powder with anisotropic shape". United States. https://www.osti.gov/servlets/purl/1632557.
@article{osti_1632557,
title = {Method of making iron nitride powder with anisotropic shape},
author = {Wang, Jian-Ping and Jiang, YanFeng},
abstractNote = {Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one a″-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one a″-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {2}
}

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