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

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United States of America Patent

PATENT NO 9997285
SERIAL NO

14304102

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
CASE WESTERN RESERVE UNIVERSITY10900 EUCLID AVENUE CLEVELAND OH 44106

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matthiesen, David Cleveland, US 2 20

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