Thermal barrier coating with improved sub-layer and parts coated with said thermal barrier
AssigneesSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A.", Societe Sochata, Office National d'Etudes et de Recherche Aerospatiales (ONERA)
InventorsSerge Alexandre Alperine, Jean-Paul Fournes, Pierre Josso, Jacques Louis Leger, Andre Hubert Louis Malie, Denis Georges Manesse
Life of this patent
Estimating the term…
Abstract
A thermal barrier coating for a superalloy part used, in particular, in turbomachines comprises a ceramic coating and a sub-layer interposed between the superalloy substrate and the ceramic coating, the sub-layer being composed of a nickel and/or cobalt aluminide containing at least one platinum-like metal and at least one metal for promoting the formation of a layer of oxide constituted by the alpha-allotropic variety of alumina.
Claims11
A coated article comprising a superalloy substrate, a protective, thermal barrier ceramic coating and a sub-layer interposed between said substrate and said ceramic coating, said sub-layer being composed of a nickel aluminide and/or cobalt aluminide modified by at least one metal selected from the group consisting of platinum, palladium, ruthenium, and combinations thereof, and including, at least in an upper part of said sub-layer, in contact with said ceramic coating, a metal for promoting the formation of a layer of oxide constituted by the alpha-allotropic variety of alumina.
Dependencies are inferred from the claim text.