ABSTRACT
Innovations in the aerospace and aircraft industry have been throwing light upon building for the future’s engineering architecture in today’s globalized world, where technology is an indispensable part of life. On the basis of the aviation sector, aircraft gas turbine engines are expected to meet the highest standards of reliability, strength/weight ratio, performance, and service life. Hence, materials that are low cost, robust, and resistant to high temperature and corrosion/oxidation, which are used not only in the aerospace and aircraft industry but also in ship, locomotive, petrochemistry, and nuclear reactor industries, have continuously maintained their timeliness. In spite of their superior properties, these materials suffer from wear, tear, cracks, and corrosion from being exposed to elevated working temperatures and harsh operating environments. In gas turbines, thermal barrier coatings (TBCs) have been used to reduce the thermal effects and to increase the thermal efficiency of the turbine. Hot corrosion is one of the main failure mechanisms in TBCs, which comes as a result of the effect of molten salt on the coating-gas interface. Hot corrosion products can lead to the delamination of TBCs.
