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Title: Transformation enabled nitride magnets absent rare earths and a process of making the same

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.
Issue Date:
OSTI Identifier:
Case Western Reserve University (Cleveland, OH) ARPA-E
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Resource Relation:
Patent File Date: 2014 Jun 13
Research Org:
Case Western Reserve Univ., Cleveland, OH (United States)
Sponsoring Org:
Country of Publication:
United States

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