FIELD: protective coatings.
SUBSTANCE: invention relates to heat-resistant coatings made of ceramic materials and to metallic articles having such type coatings, said articles being effectively applicable in gas-turbine engines. Coatings contain at least one oxide and another oxide selected from zirconium dioxide, cerium oxide, and hafnium oxide, said at least one oxide having general formula A2O3 wherein A is selected from group consisting of La, Pr, Nd, Sm, Eu, Tb, In, Sc, Y, Dy. Ho, Er, Tm, Yb, Lu, and mixtures thereof. Metallic articles are therefore constituted by metal substrate and above defined coating.
EFFECT: reduced heat conductance providing high efficiency use in gas-turbine engines.
52 cl, 6 ex
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