Patent ID: 7507482

Claim:
A component comprising a ceramic coating formed of an unsintered ceramic material having a porous microstructure and consisting of zirconia, about 2 to about 20 weight percent of at least one rare earth metal oxide as a stabilizer, about 0.5 to about 10 weight percent titania, and optionally up to about 8 weight percent yttria, the rare earth metal oxide and the titania being present in amounts to achieve a predominantly tetragonal crystal phase in the coating, wherein: the at least one rare-earth metal oxide is chosen from the group consisting of lanthana, ceria, neodymia, europia, gadolinia, erbia, dysprosia, and ytterbia; and either the ceramic material consists of zirconia, titania, and at least one of lanthana, ceria, neodymia, europia, gadolinia, and ytterbia as the at least one rare-earth metal oxide; or the ceramic material consists of zirconia, titania, at least one of lanthana, ceria, dysprosia, erbia and ytterbia as the at least one rare-earth metal oxide, and optionally yttria.