Quantitative Characterization of the Interfacial Damage in EB-PVD Thermal Barrier Coating

Considering the influence of non-equibiaxial stress state and initial residual strain on compressive buckling ceramic layer, a quantitative characterization method damage generated at interface between top coat bond in thermal barrier coating based uniaxial compression was developed. It verified by axial tests single crystal specimens with EB-PVD after undergoing various isothermal oxidation times cycles. On this basis, correlations measured interfacial loads experienced as well thickness thermally grown oxide (TGO) were analyzed. The results show that critical inducing spallation room temperature can effectively characterize accumulation caused fatigue. Under same TGO thickness, fatigue is greater than oxidation. total be divided into three parts: oxidatively driven related to mechanically stress–strain cycles coating, their interaction, where interaction term negative.