Abstract
Thermal cycling and thermal shock tests of Zirconia thermal barrier coatings deposited to structural steel substrate were carried out. Finite element analysis of thermal stress was also carried out. The number of thermal cycles to failure was reduced with increasing in test temperature. The number of thermal cycles to failure increased with an increase in specimen width and by introducing the bond coatings. The oxidation of substrate and the tensile thermal stress overlapped to occur the adhesive failure at the interface during thermal cycling. The heating rate and the holding interval seemed to be the important factors to influence the failure life in the thermal shock test, while the cooling condition was not so relevant in the present case of the adhesive failure at the interface due to the oxidation and the thermal stress.
