Patent ID: 8470460

Claim:
A thermal barrier coating comprising: a first layer deposited over a substrate, wherein the first layer comprises: a base oxide comprising at least one of zirconia and hafnia, a primary dopant comprising ytterbia, a first co-dopant comprising samaria, and a second co-dopant comprising at least one of lutetia, scandia, ceria, gadolinia, neodymia and europia; a second layer deposited over the first layer, wherein the second layer comprises at least one of: a RE 2 Zr 2 O 7 , wherein RE comprises a combination of ytterbia, samaria and at least one of lutetia, scandia, ceria, gadolinia, neodymia and europia or; a RE 2 Hf 2 O 7 , wherein RE comprises a combination of ytterbia, samaria and at least one of lutetia, scandia, ceria, gadolinia, neodymia and europia; and a third layer deposited over the second layer, comprises at least one of 7-8 yttria-stabilized zirconia, a rare earth oxide, alumina, silica, a rare earth silicate, titania, an alkali metal oxide, and an alkali earth metal oxide.