United States of America As Represented by the Secretary of the Air Force

Aerospace Materials Inc.

Melvin F Browning

Neil D Veigel

John M Blocher, Jr

John E Gates

This invention involves a method of providing suitable electrical isolation for small metal particles (such as iron) from each other, agglomerating these particles into a larger size, and overcoating the agglomerates to provide environmental protection. A product of this type has attractive electromagnetic absorbing properties at ultra high frequencies even when used in a high temperature environment that would have oxidized uncoated iron particles with resultant deterioration of its absorbing properties.

Ultra high frequency absorbing material capable of resisting a high

Composite coatings are formed of a ceramic-type material such as chromium carbide over an intermediate layer of a ductile metal such as nickel on stainless steel turbine compressor blades. Such coatings were found to reduce the erosion by entrained particles to less than 10 percent that experienced by uncoated blades.

Growing community of inventors

Columbus, OH, United States of America

Melvin F Browning