Experimental investigation of the biaxial strength of thermal barrier coating system

Design of Thermal Barrier Coatings Thickness for Gas Turbine Blade Based on Finite Element Analysis

“…It is known that thick TC can cause high residual stress during spraying and may potentially have influence on the gas flowing area. Thus, we assign the upper limit of TC thickness, ℎ , as 800 m. The critical allowed stress in TC, cr TC , is assigned as an experimentally measured biaxial strength of 174 MPa [25]. The temperature on the superalloy substrate, sub , is assumed to be no higher than the critical value, cr sub = 1000 ∘ C. To make the problem easier, an evaluation parameter, , is defined to estimate the comprehensive thermal and mechanical performances of the TBCs as follows:…”