Ceramic thermal barrier coating layer adhesion determining method for high-pressure gas turbine, involves searching image of unsticking zone between ceramic layer and substrate, and analyzing and displaying image at surface of ceramic layer

摘要

The method involves applying a laser pulse on a substrate coated with a ceramic layer, and searching a representative image of an unsticking zone between the ceramic layer and the substrate. The image is analyzed and displayed in form of an optically visible stain at a surface of the ceramic layer, where the ceramic layer is adhered on the substrate via an intermediary of an interface layer made up of oxide material.