Mechanically alloyed powder process
AssigneeGeneral Electric Company
InventorsEmil M. Habesch, Jr., John R. Rairden
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Abstract
An improved process for the preparation of oxidation and corrosion resistant cobalt, iron, or nickel-based alloy powders from a plurality of constituents in powdered form, by high energy mechanical alloying in an attritor-type mill, wherein at least one constituent is an active metal, such as aluminum, present as a substantial proportion of the total and is in elemental form.
Claims7
In the process for preparing alloy and superalloy powders from a plurality of constituents in powdered form, at least one of which is an atmospherically active element, present as a substantial proportion of the total of said constituents and in elemental form, by mechanical alloying in an attritor-type mill the improvement which comprises:
- (a) mechanically alloying said constituents in a controlled continuously decreasing presence of an alloying-enhancing agent followed sequentially and without interruption of the process at the point of substantial absence of said agent by;
- (b) dry mechanically alloying said constituents forming thereby an alloy in powdered form;
- (c) wet mixing and stripping said alloy powder in the presence of an alloying-enhancing agent, said agent being substantially present during said mixing and stripping in a quantity sufficient to completely engulf said alloy powder;
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- (d) recovering said alloy powder.
Dependencies are inferred from the claim text.