Study on Evaluation of Thermal Insulation Performance of RTa₃O₉ Thermal Barrier Coating

Abstract

An advanced thermal barrier coating is demanded for achieving the next generation gas turbine with a high efficiency. As one of many candidates, RTa₃O₉ attracts attention owing to the low thermal conductivity. In this study, the mechanical properties of YbTa₃O₉ were evaluated. As the results, it was shown that YbTa₃O₉ exhibited significantly lower thermal conductivity. However, thermal conductivities of YbTa₃O₉ exposed at more than 1073 K were increased up to that of YSZ.