Advanced thermal barrier coatings for aerospace gas turbine engine applications

In this chapter, recent trends in the development of advanced thermal barrier coating (TBC) and its architecture for enhancing gas turbine engine performance for aerospace applications are reviewed. Approaches toward the development of new ceramic top coat materials alternative to 7 wt.% of yttria-stabilized zirconia and processing techniques are described. The various degradation mechanisms when TBCs are subjected to extreme hot gaseous environments are described. This chapter focuses on the development of bilayer TBCs, which can be used to perform better than conventional TBCs. The chapter also reviews the recent progress in bilayer TBCs, performance, and future directions toward the development of more reliable and durable TBCs.