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Dispersoid reinforced alloy powder and method of making

United States Patent

October 21, 2014
View the Complete Patent at the US Patent & Trademark Office
Alloy Design and Method for Processing Low-Cost Refractory Dispersoid-Reinforced Alloys for Harsh Environments
A method of making dispersion-strengthened alloy particles involves melting an alloy having a corrosion and/or oxidation resistance-imparting alloying element, a dispersoid-forming element, and a matrix metal wherein the dispersoid-forming element exhibits a greater tendency to react with a reactive species acquired from an atomizing gas than does the alloying element. The melted alloy is atomized with the atomizing gas including the reactive species to form atomized particles so that the reactive species is (a) dissolved in solid solution to a depth below the surface of atomized particles and/or (b) reacted with the dispersoid-forming element to form dispersoids in the atomized particles to a depth below the surface of said atomized particles. Bodies made from the dispersion strengthened solidified particles exhibit enhanced fatigue and creep resistance and reduced wear as well as enhanced corrosion and/or oxidation resistance at high temperatures.
Anderson; Iver E. (Ames, IA), Terpstra; Robert L. (Ames, IA)
Iowa State University Research Foundation, Inc. (Ames, IA)
13/ 506,683
May 9, 2012
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-82 between the U.S. Department of Energy and Iowa State University.