激光合金化改性8ysz热障涂层的抗热腐蚀性能研究

Abstract

Objective Thermal barrier coatings can protect hot end components from high temperature, high pressure, and high stresses, which are extensively applied in gas turbine engine blades, combustion chamber, and ducting and nozzle guide vanes. However, many impurities (sodium, sulfur) exist in the operating gases and fuels, condensation of which leads to the formation of molten corrosive salts during the longtime service process, which may lead to the serious hot corrosion failure and reduce the lifetime of thermal barrier