Document Type

Patent

Publication Date

9-22-1998

Abstract

Apparatus and method for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidified exterior surface is formed thereon and where a protective refractory barrier layer (reaction layer) is formed whose penetration into the droplets is limited by the presence of the solidified surface so as to avoid selective reduction of key reactive alloyants needed to achieve desired powder end use properties. The barrier layer protects the reactive powder particles from environmental constituents such as air and water in the liquid or vapor form during subsequent fabrication of the powder to end-use shapes and during use in the intended service environment.

Patent Number

US 5,811,187

ISURF Reference Number

1250

Assignee

Iowa State University Research Foundation, Inc.,

Application Number

US 08/667,485

Date Filed

6-24-1996

Language

en

File Format

application/pdf

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