In the paper, the creep deformation in thermal barrier coatings due to the effect of thermal growth oxidation and temperature gradient were theoretically and experimentally studied. In the theoretical investigation, the residual stress in the thermal barrier coating were analytically obtained for a plane rectangle sample. It was found that the temperature gradient and TGO have great effect on the residual stress. In the experiment, the samples were heated in high temperature furnace at different temperature and with different time. The oxidized and non-oxidized samples were again heated by a laser beam and in this case there was a high temperature gradient along the thickness direction of TBCs. It was found that the failure modes would be surface crack or interface crack for different thickness TGO and different temperature gradient. The experimental results were good agreement with the theoretical results.
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