Low conductivity thermal barrier coating
AssigneeHoneywell International Inc.
InventorsVladimir K. Tolpygo, Wil Baker
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Abstract
A ceramic composition of matter includes a solvent material and a solute material. The solvent material comprises zirconia or hafnia, or a mixture thereof, which is stabilized with a stabilizing oxide. The solute material comprises a metal oxide of the formula, XaOb, where X is a metallic element, O is oxygen, and “a” and “b” are stoichiometric coefficients. The difference in density between the solvent material and the solute material is less than about 30%.
Claims20
A ceramic composition of matter comprising:
- a solvent material and a solute material,
- wherein the solvent material comprises zirconia or hafnia, or a mixture thereof, which is stabilized with a stabilizing oxide,
- wherein the solute material comprises a metal oxide of the formula, XaOb, where X is a metallic element, O is oxygen, and “a” and “b” are stoichiometric coefficients, and
- wherein the difference in density between the solvent material and the solute material is less than about 30%.
A superalloy article having a ceramic thermal barrier coating on at least a portion of its surface, comprising:
- a superalloy substrate comprising nickel, cobalt, iron, or a mixture thereof;
- a bond coat overlying the substrate and selected from the group consisting of:
- aluminides, and MCrAlY, wherein M is a metal selected from the group consisting of:
- cobalt, nickel, and mixtures thereof;
- and
- a columnar ceramic coat over the bond coat, the ceramic coat comprising a solvent material and a solute material,
- wherein the solvent material comprises zirconia or hafnia, or a mixture thereof, which is stabilized with a stabilizing oxide,
- wherein the solute material comprises a metal oxide of the formula, XaOb, where X is a metallic element, O is oxygen, and “a” and “b” are stoichiometric coefficients, and
- wherein the difference in density between the solvent material and the solute material is less than about 30%.
Dependencies are inferred from the claim text.