Method for determination of adhesion of layer of ceramic thermal barrier i.e. zirconia layer, formed on substrate, involves searching for image representative of area of possible separation between ceramic layer and substrate

摘要

The method involves applying a laser pulse to a surface of a ceramic thermal barrier layer i.e. zirconia layer (16), overlying a substrate (10), and searching for an image representative of an area of possible separation between the ceramic layer and the substrate. A detected image is analyzed. An absorption layer (22) and a containment layer (24) are applied to the surface of the barrier layer. The image is visualized optically in the form of a spot visible at the surface of the barrier layer.