Metallo-thermic powder
AssigneeEutectic Corporation
InventorGeorge Yurasko, Jr.
Life of this patent
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Abstract
A flame spray powder mix is provided for producing coatings on metal substrates, such as substrates of steel, cast iron, non-ferrous metals, among other substrates, the powder mix comprising agglomerates of a metallo-thermic heat generating composition (i.e., a thermic composition, such as an alumino-thermic composition) mixed with at least one coating material, such as metal and/or non-metal coating materials.
Claims16
A method of producing an adherent bond coat on a substrate which comprises, flame spraying onto said metal substrate a powder mixture formed of agglomerates of a metallo-thermic heat-generating composition mixed with a coating material,
- said agglomerates of metallo-thermo heat-generating composition comprised essentially of fine particles of a reducible metal oxide formed from a metal characterized by a negative free energy of oxidation ranging up to about 60,000 calories per gram atom of oxygen referred to 25.degree. C. intimately combined together by means of a thermally fugitive binder with fine particles of a strong reducing agent consisting essentially of a metal characterized by a negative free energy of oxidation referred to 25.degree. C. of at least about 90,000 calories per gram atom of oxygen,
- said agglomerates being uniformly mixed in an amount ranging from about 10% to 80% by weight with about 90% to 20% by weight of at least one coating material selected from the group consisting of metals, alloys, refractory oxides, and carbides, silicides, nitrides, and borides of the refractory metals of the 4th, 5th, and 6th Groups of the Periodic Table, and continuing said spraying to form an adherent bond coat on said substrate.
A method of producing an adherent bond coat on a metal substrate which comprises,
- flame spraying onto said metal substrate a powder mixture formed of agglomerates of an alumino-thermic heat generating composition mixed with a coating material,
- said agglomerates of heat-generating alumino-thermic composition comprised essentially of fine particles of nickel oxide intimately combined together with fine particles of aluminum by means of a thermally fugitive binder,
- said agglomerates being uniformly mixed in an amount ranging from about 10% to 80% by weight with about 90% to 20% by weight of at least one coating material selected from the group consisting of Fe, Ni, Co, Cu and Fe-base, Ni-base, Co-base and Cu-base alloys,
- and continuing said spraying to form an adherent bond coat on said substrate.
Dependencies are inferred from the claim text.