Functionally graded materials for advanced thermal barrier coating applications.

Abstract

Thermal Barrier Coatings (TBC) are used to prolong the lifetime of the metallic components exposed to harsh environments. To deal with the issue of bondcoat oxidation during high-temperature service leads to large residual stress that can cause delamination of the coating, Al2O3/ZrO2 system is proposed to improve the oxidation resistance of the TBC and hence, avoiding the catastrophic failure.