Abstract
Ceramic thermal bather coatings (TBCs) are an important technology for protecting hot parts of land-based gas turbine from an aggressive environment. TBCs are fabricated with the plasma spray process. This deposition technology is known as the mechanical process impacting and depositing continuously the particles molten with the plasma high temperature flow onto the target. Thus, a stress-strain curve as one of the mechanical properties of the ceramic coating in TBC system is strongly affected by the spray parameter. In this report, the stress-train response of the freestanding ceramic coating detached electrochemically from the substrate is examined. For this purpose, the bending test is performed, and influence of spray parameters such as the coating thickness and the in-flight particle velocity on the response is interested. The obtained results are following. The as-spray ceramic coating deformed with a nonlinear behavior, and the elastic modulus was increased with the particle velocity condition. The influence of coating thickness on the response was very few.
