STABILIZATION AND CORROSION RESISTANCE UNDER HIGH-TEMPERATURE OF NANOSTRUCTURED

Thermal barrier coating (TBC) systems are being used in thermal insulation compo- nents in the hot sections of gas turbines in order to increase operation temperature with better efficiency. The typical material of TBC is yttria stabilized zirconia (YSZ) because of its high thermal expansion coefficient, which closely matches that of the substrate, and low thermal conductivity. However, YSZ based TBC systems cannot be successfully applied due to hot corrosion problems caused by molten salts, such as Na, S and V, contained in low quality fuels. In recent years, nanostructured TBC attracted intense attentions due to their enhanced thermal physical properties, but the thermal stability and resistance to molten salt performance are rarely studied. As a new candidate TBC material, ceria and