METHOD OF FORMING A COATING RESISTANT TO DEPOSITS AND COATING FORMED THEREBY

摘要

A thermal barrier coating (TBC) system (20) and method for forming the coating system (20) on a component (10,76). The method entails forming a TBC (26) on the surface of the component (10,76) so that the TBC (26) has at least an outer portion (32) that is resistant to infiltration by CMAS. The TBC (26) is formed by codepositing first and second ceramic compositions by physical vapor deposition so that the entire TBC (26) has columnar grains and at least the outer portion (32) of the TBC (26) is a mixture of the first and second ceramic compositions. A platinum-group metal may be co-deposited with the first and second ceramic compositions, or deposited before the TBC (26) and then diffused into the outer portion (32).