Abstract
Young's modulus of thermal barrier coating (TBC) is one of the most essential mechanical properties on the designing of high performance TBC system. This paper describes one of the round-robin test results of New Energy and Industrial Technology Development Organization's (NEDO's) project titled “the survey-research of standardization on testing methods for thermo-mechanical performance of ceramic thermal barrier coatings”, for the fiscal years of 2006 and 2007. The bending method of the coating bonded to substrate is straightforward in preparing the specimen and loading to the specimen. Previous study has offered recommended testing methods and proper geometries of the specimens for the Young's modulus of thermal barrier coating and the bond coating. This paper confirmed that the recommended method and the geometry of the specimen provided the reasonable estimation as far as the other type of substrate material. It was also confirmed that the ratio of coating thickness to substrate thickness should be high and the threshold ratio was independent of the substrate material.
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