Diffuse black plasma sprayed coatings
AssigneeMartin Marietta Corporation
InventorsMichael E. Marousek, Dennis C. Nagle, Donald F. Shepard
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Abstract
The present invention resides in an optically black article comprising a substrate and an optically black coating adhered to the substrate. The coating has an absorptivity of at least about 0.92 and an emissivity of at least about 0.85, obtained by plasma spraying onto the substrate a composition comprising about 20% to about 50% by weight of a carbonyl metal and about 80% to about 50% by weight of a ceramic metal oxide. A preferred carbonyl metal is carbonyl iron. A preferred ceramic metal oxide is a yttria stabilized zirconia, having an average particle size in the range of about 10 microns to about 106 microns (140 mesh).
Claims11
An optically black article comprising a substrate and an optically black coating adhered to said substrate, said coating having an absorptivity at least about 0.92 and an emissivity at least about 0.85 obtained by plasma spraying onto said substrate a powder composition comprising about 20% to about 50% by weight carbonyl metal and about 80% to about 50% by weight ceramic metal oxide.
Dependencies are inferred from the claim text.