CMAS resistant, high strain tolerant and low thermal conductivity thermal barrier coatings and thermal spray coating method
AssigneeOerlikon Metco (US) Inc.
InventorsDianying Chen, Christopher G. Dambra, Mitchell R. Dorfman
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Abstract
An erosion and CMAS resistant coating arranged on a TBC coated substrate and including at least one porous vertically cracked (PVC) coating layer providing lower thermal conductivity and being disposed over a layer of MCrAlY wherein M represents Ni, Co or their combinations. At least one dense vertically cracked (DVC) erosion and CMAS resistant coating layer is deposited over the at least one PVC coating layer.
Claims17
An erosion and calcium-magnesium-aluminum-silicate (CMAS) resistant coating comprising:
- at least one porous vertically cracked (PVC) coating layer providing coefficient of thermal expansion (CTE) mitigation is disposed over a thermal barrier coating (TBC) that includes a layer of MCrAlY, wherein M represents Ni, Co or their combinations;
- and
- at least one dense vertically cracked (DVC) erosion and CMAS resistant coating layer deposited over the at least one PVC coating layer,
- wherein the PVC coating layer includes a range of between 20 and 200 substantially vertical cracks per inch.
A method of plasma spraying an erosion and CMAS resistant coating on an TBC coated substrate, comprising:
- depositing at least one porous vertically cracked (PVC) thermal barrier coating layer providing coefficient of thermal expansion (CTE) mitigation onto the TBC coated substrate;
- and
- depositing a dense vertically cracked (DVC) erosion and CMAS resistant coating material over the at least one PVC thermal barrier coating layer,
- wherein the PVC thermal barrier coating layer includes a range of between 20 and 200 substantially vertical cracks per inch.
Dependencies are inferred from the claim text.