Method for producing aluminum oxide coated iron-aluminum alloy powder
AssigneeGTE Products Corporation
InventorsJoseph E. Ritsko, Walter A. Johnson, Nelson E. Kopatz
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Abstract
A method is disclosed for producing aluminum oxide coated iron-aluminum alloy powder which comprises contacting iron-aluminum alloy powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the iron-aluminum alloy powder to form a slurry, removing essentially all of the liquid from the slurry to produce iron-aluminum alloy powder with a coating of hydrolyzed aluminum oxide, and firing the iron-aluminum alloy powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron-aluminum alloy powder with a coating of aluminum oxide.
Claims6
A method for producing aluminum oxide coated iron-aluminum alloy powder, said method comprising:
- (a) contacting iron-aluminum alloy powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to said compound and said iron-aluminum alloy powder to form a slurry;
- (b) removing essentially all of the liquid from said slurry to produce iron-aluminum alloy powder with a coating of hydrolyzed aluminum oxide;
- and
- (c) firing said iron-aluminum alloy powder with said hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron-aluminum alloy powder with a coating of aluminum oxide.
Dependencies are inferred from the claim text.