Coating and Surface Technologies for Turbine Airfoils

Abstract

The development of single crystal superalloys over the past 20 years has allowed the turbine inlet temperatures of aircraft engines to increase significantly. With further advances in superalloy temperature capability becoming more difficult, coatings and other surface technologies are becoming more important.Various approaches to improving the coating system, including both the bond coat and the thermal barrier coating are discussed. It is shown that significant improvements can be made in both components of the coating system, allowing for higher operating temperatures. While the airfoil coating system is being improved, the airfoil tips and areas below the platform of the blade must also be addressed as well. A new, high temperature turbine blade tip alloy is introduced and the application of coatings to non-flowpath surfaces are also discussed. Material improvements in the entire turbine airfoil material system will continue to allow turbine inlet temperatures to increase.

Recent developments in gas turbine materials and technology and their implications for syngas firing

“…4. Trend in materials temperature capability and RIT for aero gas turbines [11]. that there remains some potential for further improvement in the performance of DS alloys.…”

Структурные фазовые превращения при твердофазной реакции в тонких двухслойных пленках Al/Pt

“…Интерметал-лические соединения Al−Pt применяются в микроэлек-тронных устройствах [4,5], обладают эффектом памяти формы [6], могут использоваться в качестве огнеупор-ных сплавов [7,8] и в конструкциях солнечных элемен-тов [9].…”

Incorporation and evolution of ZrO2 nano-particles in Pt-modified aluminide coating for high temperature applications

“…However, the investigation of Zr was mostly limited to alloys rather than coatings [16,19]. To date, only limited studies have reported the effects of Zr in PtAl coatings [20,21], and it should be noted that the methods used for introducing Zr are either costly or under development [20,22].…”