押し込み試験による多孔質遮熱被膜の変形特性の評価

抄録

In this report, macroscopic elastic deformation properties of the four kinds of porous Thermal Barrier Coating (TBC) is investigated experimentally and analytically. First, the indentation tests were performed to obtain the loading and unloading-depth curves in various load levels, and secondarily Young's moduli were explored by using the unloading-depth curves, Hertz-contact theory and FEM analysis at several loading levels. It became clear that the obtained Young's moduli increase with increasing indentation load, which means that the obtained Young's modulus is an apparent modulus of the coating having some structural failure caused by indentation test. As the results, the real Young's moduli were determined at the very small load level with no structural failure for the four kinds of porous thermal barrier coatings.