Numerical and Experimental Studies on the In-Situ Measurement of Thermal Conductivity of the Thermal Barrier Coating

Abstract

The thermal conductivity of thermal barrier coating (TBC) materials can be measured using transient and steady-state methods. It is crucial to evaluate the high-temperature thermal insulation performance of TBC materials. Although several steady-state methods exist for obtaining in situ TBC thermal conductivity at high temperatures, they are limited by heating methods and heat flux measurement instruments. In this study, a transient-state method is proposed, which does not have these limitations. Numerical simulations indicate that this method accurately predicts the temperature-dependent thermal conductivity of TBC materials in situ. The experimental results align well with existing literature. This method has potential applications for monitoring TBC failures, such as sintering, cracking, and peeling.