Patent ID: 7445851

Claim:
Heat-insulating layer system for metallic structural components of a gas turbine, comprising an adhesion-promoting layer ( 12 ) adapted to be disposed on a surface ( 11 ) of a gas turbine structural component ( 10 ) , an inner contact layer ( 14 ) arranged on the adhesion-promoting layer ( 12 ), and an outer cover layer ( 15 ) arranged on the inner contact layer ( 14 ), characterized in that a) the inner contact layer ( 14 ) is formed of a zirconium oxide partially stabilized with yttrium, yttrium oxide, calcium or magnesium, and b) the outer cover layer ( 15 ) is formed of a material that consists of at least one component with at least one phase, which stoichiometrically comprises 1 to 80 Mol-% Mx 2 O 3 , 0.5 to 80 Mol-% MyO and Al 2 O 3 as a remainder with incidental impurities, wherein Mx is selected from the elements chromium and barium or mixtures thereof, and wherein My as selected from the alkaline earth metals, the transition metals and the rare earths or mixtures thereof.