The Effect of Thermal Mismatch on Stresses, Morphology and Failures in Thermal Barrier Coatings
28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings
Platinum modified aluminide bond coat used for oxidation protection in thermal barrier coatings are prone to develop morphological instabilities in the interface to the ceramic top coat. Previous work has shown that there are a range of factors influencing this development, where key factors are the lateral growth strain in the thermally grown oxide, the relatively low yield strength of the Pt‐modified bond coat at high temperature, and cyclic loading. In this study we show that the development of the instabilities can be greatly enhanced due to the thermal mismatch between the substrate and the bond coat.
Shi, J.; Darzens, S.; and Karlsson, Anette M., "The Effect of Thermal Mismatch on Stresses, Morphology and Failures in Thermal Barrier Coatings" (2003). Mechanical Engineering Faculty Publications. 333.