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Dispersion Hardening Alloys by Atomization and Internal Oxidation

IP.com Disclosure Number: IPCOM000090374D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Petrovich, AI: AUTHOR

Abstract

This method of producing dispersion hardening metal entails melting together a matrix metal such as copper nickel etc., and a readily oxidizable metal such as aluminum beryllium or silicon. The alloy is comminuted by an atomization process and, at the same time, the alloy is internally oxidized. Subsequently, reduction by hydrogen gas or some other reducing agent reconverts the oxidized matrix metal back to a metal state while leaving the dispersed oxide unaffected. A typical setup for carrying out this process includes a crucible 1 in which copper and aluminum are melted together with precautions being taken to prevent stratification of the light metal. The melted alloy is delivered to holding vessel 2 that controls the demand for the molten alloy going to the atomizer.

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Dispersion Hardening Alloys by Atomization and Internal Oxidation

This method of producing dispersion hardening metal entails melting together a matrix metal such as copper nickel etc., and a readily oxidizable metal such as aluminum beryllium or silicon.

The alloy is comminuted by an atomization process and, at the same time, the alloy is internally oxidized. Subsequently, reduction by hydrogen gas or some other reducing agent reconverts the oxidized matrix metal back to a metal state while leaving the dispersed oxide unaffected. A typical setup for carrying out this process includes a crucible 1 in which copper and aluminum are melted together with precautions being taken to prevent stratification of the light metal.

The melted alloy is delivered to holding vessel 2 that controls the demand for the molten alloy going to the atomizer. The actual atomization is done in a controlled atmosphere such that the atomized metal while still molten is subjected to a gas with a controlled oxidizing potential. The alloy enters atomizing chamber 4 in a thin stream via crucible 3. The metal stream is broken up into minute particles by some manner such as impingement on plate 5 of transite cement-asbestos board in a controlled atmosphere or by other methods. The powdered metal is then formed into a briquet and sintered in a reducing atmosphere in a normal manner prior to wire drawing.

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