Abstract
The thermal conductivity of thermal barrier coatings (TBCs) is normally measured using laser flash method, which is a two‐sided thermal imaging method. Because laser flash cannot be used for TBCs applied on real components, one‐sided thermal imaging method is being developed for potential nondestructive inspection and monitoring of TBC conditions during service. One such method is a multilayer thermal modeling method developed at Argonne National Laboratory. In this study, these methods are reviewed and their capability for conductivity measurement for two‐layer TBC material is analyzed based on theoretical analyses. In particular, it is identified that only one TBC property, the conductivity, can be determined by two‐sided methods, while two TBC properties, conductivity and heat capacity, can be determined by one‐sided method.
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