COMPOSITION DE BARRIERE THERMIQUE DE FAIBLE CONDUCTIVITE THERMIQUE, PIECE MECANIQUE EN SUPERALLIAGE PROTEGEE PAR UN REVETEMENT DE CERAMIQUE AYANT UNE TELLE COMPOSITION, ET METHODE DE REALISATION DU REVETEMENT DE CERAMIQUE

摘要

Thermal barrier composition is based on zirconia containing dysprosium oxide for stabilization and thermal conductivity reduction. A low thermal conductivity thermal barrier composition is based on zirconia containing dysprosium oxide, for stabilization and thermal conductivity reduction, and optionally an oxide of a tetravalent metal of atomic weight greater than that of zirconium. Independent claims are also included for: (i) a mechanical part of a superalloy having a ceramic coating of the above composition; and (ii) a method of forming a thermal barrier coating on a superalloy substrate by depositing the above composition on a bond layer on the substrate.