Transformation enabled nitride magnets absent rare earths and a process of making the same
Abstract
A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.
- Inventors:
- Issue Date:
- Research Org.:
- Case Western Reserve Univ., Cleveland, OH (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1457699
- Patent Number(s):
- 9997285
- Application Number:
- 14/304,102
- Assignee:
- Case Western Reserve University (Cleveland, OH)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
- DOE Contract Number:
- AR0000194
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Jun 13
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Matthiesen, David. Transformation enabled nitride magnets absent rare earths and a process of making the same. United States: N. p., 2018.
Web.
Matthiesen, David. Transformation enabled nitride magnets absent rare earths and a process of making the same. United States.
Matthiesen, David. Tue .
"Transformation enabled nitride magnets absent rare earths and a process of making the same". United States. https://www.osti.gov/servlets/purl/1457699.
@article{osti_1457699,
title = {Transformation enabled nitride magnets absent rare earths and a process of making the same},
author = {Matthiesen, David},
abstractNote = {A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {6}
}
Works referenced in this record:
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The synthesis, structure, and characterization of α″‐Fe16N2 (invited)
journal, November 1994
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Enhanced Fe moment in nitrogen martensite and Fe16N2 (invited)
journal, November 1994
- Wallace, W. E.; Huang, M. Q.
- Journal of Applied Physics, Vol. 76, Issue 10, p. 6648-6652