Stability of gas atomized reactive powders through multiple step in-situ passivation

Anderson, Iver E.; Steinmetz, Andrew D.; Byrd, David J.

Title: Stability of gas atomized reactive powders through multiple step in-situ passivation

Abstract

A method for gas atomization of oxygen-reactive reactive metals and alloys wherein the atomized particles are exposed as they solidify and cool in a very short time to multiple gaseous reactive agents for the in-situ formation of a protective reaction film on the atomized particles. The present invention is especially useful for making highly pyrophoric reactive metal or alloy atomized powders, such as atomized magnesium and magnesium alloy powders. The gaseous reactive species (agents) are introduced into the atomization spray chamber at locations downstream of a gas atomizing nozzle as determined by the desired powder or particle temperature for the reactions and the desired thickness of the reaction film.

Inventors:: Anderson, Iver E.; Steinmetz, Andrew D.; Byrd, David J.

Issue Date:: 2020-04-14

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1650757

Patent Number(s):: 10618854

Application Number:: 15/731,136

Assignee:: Iowa State University Research Foundation, Inc. (Ames, IA)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER

C - CHEMISTRY C06 - EXPLOSIVES C06B - EXPLOSIVES OR THERMIC COMPOSITIONS

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B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
B22F1/0088 - {Chemical treatment, e.g. passivation}
B22F2009/0844 - {in controlled atmosphere}
B22F2201/00 - Treatment under specific atmosphere
B22F2201/03 - Oxygen
B22F2201/10 - Inert gases
B22F2999/00 - Aspects linked to processes or compositions used in powder metallurgy
B22F9/082 - {atomising using a fluid
B22F9/16 - using chemical processes

C - CHEMISTRY C06 - EXPLOSIVES C06B - EXPLOSIVES OR THERMIC COMPOSITIONS
C06B45/30 - the component base containing an inorganic explosive or an inorganic thermic component

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DOE Contract Number:: AC02-07CH11358

Resource Type:: Patent

Resource Relation:: Patent File Date: 04/24/2017

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Anderson, Iver E., Steinmetz, Andrew D., and Byrd, David J. Stability of gas atomized reactive powders through multiple step in-situ passivation.  United States: N. p., 2020. 
        Web.

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                    Anderson, Iver E., Steinmetz, Andrew D., & Byrd, David J. Stability of gas atomized reactive powders through multiple step in-situ passivation.  United States.

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                    Anderson, Iver E., Steinmetz, Andrew D., and Byrd, David J. Tue .  
        "Stability of gas atomized reactive powders through multiple step in-situ passivation".  United States.  https://www.osti.gov/servlets/purl/1650757.

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@article{osti_1650757,

  title        = {Stability of gas atomized reactive powders through multiple step in-situ passivation},

  author       = {Anderson, Iver E. and Steinmetz, Andrew D. and Byrd, David J.},

  abstractNote = {A method for gas atomization of oxygen-reactive reactive metals and alloys wherein the atomized particles are exposed as they solidify and cool in a very short time to multiple gaseous reactive agents for the in-situ formation of a protective reaction film on the atomized particles. The present invention is especially useful for making highly pyrophoric reactive metal or alloy atomized powders, such as atomized magnesium and magnesium alloy powders. The gaseous reactive species (agents) are introduced into the atomization spray chamber at locations downstream of a gas atomizing nozzle as determined by the desired powder or particle temperature for the reactions and the desired thickness of the reaction film.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2020},

  month        = {4}

}

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Works referenced in this record:

Atomizing apparatus for making polymer and metal powders and whiskers
patent, March 2003

Otaigbe, Joshua U.; McAvoy, Jon M.; Anderson, Iver E.
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Environmentally stable reactive alloy powders and method of making same
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Atomizing nozzle and process
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Apparatus for making environmentally stable reactive alloy powders
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Anderson, Iver E.; Lograsso, Barbara K.; Terpstra, Robert L.
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Surface-Modified Magnesium Powders For Use In Pyrotechnic Compositions
patent-application, January 2009

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US Patent Application 12/167845; 20090025841
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20090025841

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Title: Stability of gas atomized reactive powders through multiple step in-situ passivation

Abstract

Citation Formats

Atomizing apparatus for making polymer and metal powders and whiskers patent, March 2003

Environmentally stable reactive alloy powders and method of making same patent, September 1998

Method of making environmentally stable reactive alloy powders patent, December 1994

Gas atomization synthesis of refractory or intermetallic compounds and supersaturated solid solutions patent, November 1994

Method for Inhibiting the Oxidation of Readily Oxidizable Metals patent, September 1934

Electric arc spraying of reactive metals patent, February 1991

Atomizing nozzle and process patent, June 1992

Apparatus for making environmentally stable reactive alloy powders patent, December 1996

Surface-Modified Magnesium Powders For Use In Pyrotechnic Compositions patent-application, January 2009

Atomizing apparatus for making polymer and metal powders and whiskers
patent, March 2003

Environmentally stable reactive alloy powders and method of making same
patent, September 1998

Method of making environmentally stable reactive alloy powders
patent, December 1994

Gas atomization synthesis of refractory or intermetallic compounds and supersaturated solid solutions
patent, November 1994

Method for Inhibiting the Oxidation of Readily Oxidizable Metals
patent, September 1934

Electric arc spraying of reactive metals
patent, February 1991

Atomizing nozzle and process
patent, June 1992

Apparatus for making environmentally stable reactive alloy powders
patent, December 1996

Surface-Modified Magnesium Powders For Use In Pyrotechnic Compositions
patent-application, January 2009