Yttria-stabilized zirconia coating with a molten silicate resistant outer layer
AssigneeUnited Technologies Corporation
InventorsKevin W. Schlichting, Michael J. Maloney, David A. Litton, Melvin Freling, John G. Smeggil, David B. Snow
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Abstract
A turbine engine component is provided which has a substrate, a yttria-stabilized zirconia coating applied over the substrate, and a molten silicate resistant outer layer. The molten silicate resistant outer layer is formed from gadolinia or gadolinia-stabilized zirconia. A method for forming the coating system of the present invention is described.
Claims53
A turbine engine component comprising:
- a substrate;
- a yttria-stabilized zirconia coating applied over said substrate;
- and
- a molten silicate resistant outer layer.
A coating system comprising
- a layer of yttria-stabilized zirconia;
- and
- a molten silicate resistant outer layer.
A method for providing a component with protection against sand related distress comprising the steps of:
- providing a substrate;
- depositing a layer of a yttria-stabilized zirconia material on the substrate;
- and
- forming a molten silicate resistant outer layer over the yttria-stabilized zirconia material.
A coating system for a component comprising an inner layer formed from a yttria-stabilized zirconia and an outer layer having a barrier phase of at least one of oxyapatite and garnet to resist penetration of molten silicate material.
Dependencies are inferred from the claim text.