Abstract
Residual stresses of a thermal barrier coating (TBC) system are important parameters because it will cause the damages of the system. The residual stresses of the TBC system was evaluated by the curvature method. The curvatures of the substrate with blast treatment, the specimen with blast and bond coat (BC), and the TBC specimen with blast, BC and top coat were measured. The residual stress of each layers in the TBC system was evaluated by the model based on the misfit strain between the coating and the substrate. The method can also provide the residual stresses of the BC in the TBC system. It was found that the method provides reasonable residual stresses as compared with literature values.
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