High-Temperature (HT) Coatings for Turbine Blades and Vanes

"High temperature (HT) coatings are applied on hot-section components of gas turbines to prevent them from premature failure caused by oxidation, hot corrosion, and overheating. As the turbine firing temperature continually increases in the recent yearswith the introduction of more advanced turbine designs, the hot-section components in these turbines are running at increasingly high temperatures, and HT coatings applied on these hot-section components need provide better protection in order to meet thedesigned performance criteria. Phase I of this project will identify HT coating performance requirements and specifications for the F402 and T700 naval aircraft engines, define application techniques and characterize the coating system's composition, andselect one or more coatings for further development in Phase II. Phase II will conduct laboratory hot gas and cascade tests of selected coating systems, and Phase III will carry out the accelerated simulated mission endurance test to determine the coatingsystem performance in an integrated engine under realistic operational conditions. The optional portion of this project will also include selecting HT coatings for the advanced F414 and F119/F120 engines with higher turbine firing temperatures. HTcoatings with better protectiveness can reduce unscheduled and costly inspections, repair, and overhauls of gas turbine hot sections. The success of this project and the subsequent transi