Document Type

Patent

Publication Date

4-20-2010

Abstract

A method of making dispersion-strengthened alloy particles involves melting analloy having a corrosion and/or oxidation resistance-imparting alloying element, adispersoid-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. The atomized alloy particles are solidified as solidified alloy particles or as a solidified deposit of alloy particles. Bodies made from the dispersion strengthened alloy particles, deposit thereof, exhibit enhanced fatigue and creep resistance and reduced wear as well as enhanced corrosion and/or oxidation resistance at high temperatures by virtue of the presence of the corrosion and/or oxidation resistance imparting alloying element in solid solution in the particle alloy matrix.

Patent Number

US 7,699,905 B1

Assignee

Iowa State University Research Foundation, Inc.

Application Number

11/429,918

Date Filed

5-8-2006

Language

en

File Format

application/pdf

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