热障涂层系统损伤与断裂研究进展

Thermal barrier coating (TBC) is one of the key technologies of aeroengine and gas turbine, which can improve the service temperature and service life of hot end components due to their abilities to insulate against the heat transfer and resist the oxidation, corrosion and erosion. Under the conditions with high temperature and pressure, strong oxidation and corrosion, thermal barrier coatings (TBCs) are prone to failure in the form of coating debonding, blistering, buckling, cracking and spalling, which seriously limits the service life of hot end components. Therefore, it is of great significance to study the damage and fracture mechanism of TBCs to ensure the safety and stability of high-temperature blades and other hot end components in service. This article presents a comprehensive overview of development of TBCs, including: ① the damage and fracture behaviors and failure mechanisms of TBCs, ② constitutive model, ③ damage and fracture mechanics method and their behaviors under harsh environment, ④ the development of TBCs strength test and damage detection methods, ⑤ perspective for the study on damage and fracture of TBCs. The aim of this work is to provide support for basic research and technology development of aeroengine and gas turbine in China.