DURABLE THERMAL BARRIER COATING COMPOSITIONS, COATED ARTICLES, AND COATING METHODS

A composition useful as a thermal barrier coating on a superalloy substrate intended for use in hostile thermal environments. The coating comprises zirconia stabilized in a predominately tetragonal phase. The composition includes a ceramic component consisting essentially of zirconia (ZrO2) or a com...

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Bibliographische Detailangaben
Hauptverfasser:	VENKATARAMANI, VENKAT, S, FU, MING, BOUTWELL, BRETT, JOHNSON, CURTIS, ALAN, KONITZER, DOUGLAS, G, SCHAEDLER, TOBIAS, A, HAZEL, BRIAN, THOMAS, LIPKIN, DON, M
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	A composition useful as a thermal barrier coating on a superalloy substrate intended for use in hostile thermal environments. The coating comprises zirconia stabilized in a predominately tetragonal phase. The composition includes a ceramic component consisting essentially of zirconia (ZrO2) or a combination of zirconia and hafnia (HfO2) and a stabilizer component comprising, in combination, a first co-stabilizer selected from YbO1.5, HoO1.5, ErO1.5, TmO1.5, LuO1.5, and combinations thereof, and optionally YO1.5, a second co-stabilizer selected from TiO2, PdO2, V02, GeO2, and combinations thereof, and a third co-stabilizer comprising TaO2.5. The stabilizer component is present in an amount effective to achieve the predominantly tetragonal phase in the coating. La présente invention concerne une composition utile en tant que revêtement de barrières thermiques sur un substrat de superalliage destinées à être utilisées dans des environnements thermiques hostiles. Le revêtement comporte de la zircone stabilisée dans une phase majoritairement tétragonale. La composition comporte un constituant céramique composé essentiellement du zircone (ZrO2) ou une combinaison de zircone et d'oxyde d'hafnium (HfO2) et un constituant stabilisateur, comportant, en combinaison, un premier co-stabilisant choisi parmi YbOl,5, HoOl,5, ErOl,5, TmOl,5, LuOl,5, et des combinaisons de ceux-ci, et éventuellement un second co-stabilisant choisi parmi TiO2, PdO2, V02, GeO2, et des combinaisons de ceux-ci, et un troisième co-stabilisant comportant TaO2,5. Le constituant stabilisateur est présent en une quantité efficace pour obtenir la phase majoritairement tétragonale dans le revêtement.