Patent ID: 7351482

Claim:
A zirconia-containing ceramic composition capable of providing a thermal barrier coating wherein the zirconia is stabilized in the cubic crystalline phase, and which consists of: 1. from about 50 to about 90 mole % zirconia; and 2. a stabilizing amount of from about 5 to about 49 mole % of a stabilizer component comprising: a. a first metal oxide selected from the group consisting of ytterbia, neodymia, mixtures of ytterbia and neodymia, mixtures of ytterbia and lanthana, mixtures of neodymia and lanthana, and mixtures of ytterbia, neodymia and lanthana in an amount of from about 5 to about 49 mole % of the composition; and 3. one or more of a metal oxide selected from the group consisting of: a. hafnia in an amount from about 0.5 to about 40 mole % of the composition; and b. tantala in an amount of from about 0.5 to about 10 mole % of the composition.