Investigation of failure mechanism of thermal barrier coatings (TBCs) deposited by EB-PVD technique

Failure mechanism of thermal barrier coatings (TBCs) prepared by electron beam physical vapor deposition (EB-PVD) technique owing to formation of micro cracks was investigated. The TBCs were deposited on the Ni-based super alloy IN-100 and the micro cracks were observed within the top ceramic coat of thermally cycled TBCs at 1050?C. It was observed that these cracks propagate in the ceramic coat in the direction normal to interface while no...