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US 2021/0277792 A1Published application
Geometrically segmented abradable ceramic thermal barrier coating with improved spallation resistance
AssigneeRaytheon Technologies Corporation
InventorChristopher W. Strock
Life of this patent
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Abstract
A turbine article includes a substrate with a geometric surface having a multiple of divots recessed into the substrate, and a ceramic topcoat disposed over the geometric surface, the topcoat including at least a first layer having a first hardness and a second layer having a second hardness, the first hardness different than the second hardness.
Claims14
A turbine article comprising:
- a substrate with a geometric surface having a multiple of raised substrate features and a multiple of divots forming coplanar surfaces;
- and
- a ceramic topcoat disposed over the geometric surface, the ceramic topcoat comprising a first layer having a first hardness, a second layer on the first layer, the second layer having a second hardness, the first hardness different than the second hardness, a third layer on the second layer, the third layer having a hardness about equivalent to the first hardness, wherein the third layer is flush with a top surface of the geometric surface, the top surface of the multiple of raised substrate features and the bottom of each of the multiple of divots forming coplanar surfaces that are generally perpendicular to a spray stream for depositing the geometrically segmented abradable coating.
14-20. (canceled)
Dependencies are inferred from the claim text.