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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:
; ;
Issue Date:
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
DOE Contract Number:  
AC02-07CH11358
Resource Type:
Patent
Resource Relation:
Patent File Date: 04/24/2017
Country of Publication:
United States
Language:
English

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

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


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


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


Electric arc spraying of reactive metals
patent, February 1991


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


Atomizing nozzle and process
patent, June 1992


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