Michael A Gedwill

44514964, May 29, 1984

Jan 7, 1983

6/456460

Michael A. Gedwill - North Olmsted OH
Stanley R. Levine - Rocky River OH
Thomas K. Glasgow - Rocky River OH

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

B05D 108

427 34

A base layer of an oxide dispersed, metallic alloy (cermet) is arc-plasma sprayed onto a substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use. A top layer of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then arc-plasma sprayed onto the base layer. A heat treatment is used to improve the bonding. The base layer serves as an inhibitor to interdiffusion between the protective top layer and the substrate. Otherwise, the protective top layer would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.

44461992, May 1, 1984

Jul 30, 1982

6/403378

Michael A. Gedwill - North Olmsted OH
Stanley R. Levine - Rocky River OH
Thomas K. Glasgow - Rocky River OH

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

B32B 1500

428639

A substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use is coated with a base coating of an oxide dispersed, metallic alloy (cermet). A top coating of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then deposited on the base coating. A heat treatment is used to improve the bonding. The base coating serves as an inhibitor to interdiffusion between the protective top coating and the substrate. Otherwise, the protective top coating would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.