Thermal behavior of glass-ceramic bond coat in a TBC system

Thermal behavior of a glass-ceramic bonded thermal barrier coating (TBC) system was evaluated in terms of oxidation resistance and thermal gradient. It was observed that the weight gain of the glass-ceramic bonded TBC system was significantly lower than that of the conventional TBC system during thermal exposure of 500 h at 1200 °C. Thermal gradient between the top coat and substrate of the present TBC system was found to be 757 °C when the top coat surface temperature was kept at 1200 °C. The present TBC with high oxidation resistance and thermal gradient properties was found to be effective for next generation gas turbine applications.