Abstract
Thermal barrier coatings (TBCs) are key materials of turbines for propulsion and power generation. The failure mechanism of TBCs is a crucial problem in scientific community and need to be resolved. Failure of TBCs is a complicated process affected by its own performance, microstructure and service environment. In this study, thermal barrier coatings of ZrO2 were prepared by plasma spraying method. A SEM with heating system is used to study in situ microstructure change of TBCs at service temperature. Changes in microstructure and interfaces as well as healing and development of cracks are revealed. It is expected that the investigation of the failure mechanism of the TBCs from a microscopic point help to improve service life of the TBCs by providing a reliable basis to solve the failure problem.
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