Martin Marietta Corporation

Smith & Nephew Richards Inc.

Martin Marietta Corportion

Michael E Marousek

Dennis C Nagle

Donald F Shepard

Robert J Fenolia

Russell D Jamison

Larry H Strait, Jr

Neal B Beals

Stephen L Van Doren

An article of manufacture comprises a substrate and an optically black surface on the substrate and having an absorptivity of more than about 0.89 and an emissivity more than about 0.86. The surface comprises boron particles plasma spray applied to the substrate using a powder selected from the group consisting of crystalline boron having a particle size finer than about 200 mesh and amorphous boron.

High-temperature, High-emissivity, optically black boron surface

A coated prosthetic implant and a method of forming a continuous coating of highly crystalline polymer over a prosthetic implant by means of passing particles of polymer through a high temperature plasma and subsequently depositing the molten particles over the implant surface. This invention is especially useful for coating polymer composite implants, such as a femoral insert for a hip joint prosthesis, with a coating of poly (aryl-ether-ketone).

Prosthetic implants with a highly crystalline coating

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).

Diffuse black plasma sprayed coatings

High-temperature, high-emissivity, optically black boron surface

Growing community of inventors

Baltimore, MD, United States of America

Michael E Marousek