Characterization of thermal fatigue damage of thermal barrier produced by atmospheric plasma spraying

Thermal barrier coatings (TBCs) intended for high temperature applications often are manufactured by atmospheric plasma spraying (APS) of stabilized zirconia. The bond layer between metal and ceramic usually is a sprayed metallic coating and the thermal barrier reliability is influenced by the behaviour of the substrate–bond layer and the bond layer–ceramic interfaces. s paper, interest is focused on the means for non-destructive characterization of damage to the interface during thermal cycles by using acoustic emission (AE) and ultrasonic imaging (UI).