United Technologies Corporation

Raytheon Technologies Corporation

Robert J Meehan

Dmitri Novikov

Henry H Thayer

Bartolomeo Palmieri

Steven M Burns

Neil B Ridgeway

Christopher J Millea

A method for stripping ceramic from a component includes applying a liquid to a ceramic coating of an outer surface of the component. The method also includes directing a plurality of laser pulses at the ceramic coating with the applied liquid in order to spall the ceramic coating from the component.

Liquid enhanced laser stripping

A method of forming a thermal barrier coating on a metal part includes laser cleaning a surface of the metal part to remove undesirable oxides and residues from the surface of the part. It further includes depositing an aluminum containing bondcoat on the part and thermally interdiffusing the bondcoat and the part with a heat treatment. Laser cleaning a surface of the bondcoat to remove oxides and debris from the surface forms an alpha aluminum oxide layer on the bondcoat. A ceramic topcoat is then deposited on the alpha aluminum oxide layer at a temperature above 1800&#xb0; F. (982&#xb0; C.).

Laser assisted oxide removal

A thermal barrier coating may be applied by depositing a MCrAIY bond coat onto a superalloy substrate, wherein M stands for Ni, Co, Fe, or a mixture of Ni and Co. Undesired oxides and contaminants are removed from the MCrAIY bond coat with an ionized gas stream cleaning process, such as a reverse transfer arc process. An adherent aluminum oxide scale is formed on the MCrAIY bond coat and a ceramic layer is deposited on the aluminum oxide scale by physical vapor deposition to form a columnar structure.

Method for applying improved durability thermal barrier coatings

Growing community of inventors

Manchester, CT, United States of America

Robert J Meehan