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

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

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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:: Matthiesen, David

Issue Date:: 2018-06-12

OSTI Identifier:: 1457699

Assignee:: Case Western Reserve University (Cleveland, OH) ARPA-E

Patent Number(s):: 9,997,285

Application Number:: 14/304,102

Contract Number:: AR0000194

Resource Relation:: Patent File Date: 2014 Jun 13

Research Org:: Case Western Reserve Univ., Cleveland, OH (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

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