Thermal barrier coating composition with low thermal conductivity, superalloy mechanical part with ceramic coating of said composition and method for obtaining such coating

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.