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

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:: Matthiesen, David

Issue Date:: 2018-06-12

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1457699

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

Application Number:: 14/304,102

Assignee:: Case Western Reserve University (Cleveland, OH)

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.

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                    Matthiesen, David. Transformation enabled nitride magnets absent rare earths and a process of making the same.  United States.

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                    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.

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@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}

}

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Works referenced in this record:

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Similar Records

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

Abstract

Citation Formats

Magnetic material containing rare earth element, iron, nitrogen, hydrogen and oxygen and bonded magnet containing the same patent, November 1992

Rare earth-iron-nitrogen system permanent magnet and process for producing the same patent, June 1995

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Magnetic material containing rare earth element, iron, nitrogen, hydrogen and oxygen and bonded magnet containing the same
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