Abstract
Thermal barrier coatings (TBCs) provide a good protection to high temperature corrosion of superalloy substrate in gas turbine. However, the lateral growth of the thermally grown oxide (TGO) and the thermal expansion misfit between underlying bond coat (BC) and TGO may induce internal stresses. In this work, the distortion occurring near a groove on a heat-resistant Fecralloy substrate was analyzed due to subjected to thermal and thermo-mechanical cycling. Experimental result shows that the distortion of the groove strongly effected by mechanical load.
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