Patent ID: 6544665
Filing Date: 2003-04-08
Classification: C23C,Y02T,Y10T

Abstract:
A component having a thermal barrier coating on a surface thereof, the thermal barrier coating having a microstructure comprising grains, grain boundaries, and defects and pores at and between the grain boundaries, the thermal barrier coating containing impurities in an amount sufficient to cause at least one of grain boundary sliding, grain sintering and coarsening, and enhanced surface diffusion that lead to densification of the thermal barrier coating, the thermal barrier coating further containing precipitates of alumina within the microstructure in an amount of at least 0.1 mole percent up to 3 mole percent of the thermal barrier coating to getter the impurities so as to inhibit densification of the thermal barrier coating, at least some of the precipitates being located within the defects and pores of the microstructure.