A comprehensive Review on the Hot Corrosion and Erosion Performance of thermal Barrier Coatings

Thermal barrier coatings (TBCs) are primarily utilized to give thermal insulation to metallic components like turbine blades, vanes, in gas turbines (GT) and in the different components of internal combustion (IC) engines such as piston crown. The major degradation mechanisms that required to be studied for the design of high performance TBCs are hot corrosion (H-C) and erosion. From last two decades, researchers have been focused to solve this problem and are still working in-depth to minimize the H-C and erosion rates of TBCs using various surface modification methods. This review work is an attempt to inquest the desirable microstructural and mechanical features in different processed TBCs which are essential to combat H-C and erosion of TBCs. Also the aviation and automobile sector is seeking alternatives to minimize emissions from aircrafts and automobiles while maintaining or enhancing current GT and IC engine power and efficiency. TBCs like Yttria stabilized zirconia (YSZ) assists in raising the operating temperatures as increased temperatures of combustion results in better combustion, thereby decreasing emissions. The findings of this study offer in-depth insights into the role of TBCs in reducing harmful emissions. At last challenges during fabrication of TBCs and scope for future work are also discussed.