Dispersion strengthened ceramic thermal barrier coating
AssigneeUnited Technologies Corporation
InventorsKevin W. Schlichting, Paul H. Zajchowski
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Abstract
A method of forming a thermal barrier coating on a turbine component is disclosed. The method comprises first depositing a bond coat on the turbine component. A dispersion strengthened ceramic layer containing boride particles as dispersoids is formed on the bond coat layer by plasma deposition. Ceramic coated boride particles comprise the plasma deposition feedstock in order to disperse the boride particles in the ceramic layer. The dispersion strengthened ceramic layer includes at least one of yttria-stabilized zirconia, rare earth stabilized zirconia, rare earth stabilized hafnia, and rare earth stabilized titanate.
Claims24
A method of forming a thermal barrier coating system on a turbine engine component, the method comprising:
- forming a bond coat on the turbine engine component;
- and forming a dispersion strengthened ceramic coating on the bond coat, wherein the dispersion strengthened ceramic coating comprises composite particles therein.
A turbine engine component comprising:
- a substrate;
- a bond coat on the substrate;
- and
- a dispersion strengthened ceramic coating on the bond coat, wherein the dispersion strengthened ceramic coating comprises composite particles therein.
An improved plasma feed stock powder particle comprising reinforcing particles surrounded by a protective ceramic coating.
Dependencies are inferred from the claim text.