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US 10,919,180 B2Granted
Repair process using networked ceramic nanofibers
AssigneeRaytheon Technologies Corporation
InventorZhongfen Ding
Life of this patent
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Abstract
A repair process for an article such as an airfoil includes providing an article that has a substrate and a ceramic barrier coating disposed on the substrate, where the ceramic barrier coating has a damaged region, abrading the damaged region to provide dimple in the ceramic barrier coating, wherein a remaining region of the ceramic barrier coating adjacent the dimple remains intact, and depositing a patch of networked ceramic nanofibers in the dimple.
Claims18
A repair process comprising:
- providing an article that has a substrate and a ceramic barrier coating disposed on the substrate, wherein the ceramic barrier coating has a porous columnar microstructure that includes microstructural columns that define elongated pores there between and the ceramic barrier coating has a damaged region;
- abrading the damaged region to provide a dimple in the ceramic barrier coating, wherein a remaining region of the ceramic barrier coating adjacent the dimple remains intact;
- and
- depositing a patch of networked ceramic nanofibers in the dimple, wherein the networked ceramic nanofibers comprise filaments that are non-linear and intertwined so as to form a porous network, the filaments being bonded together at locations where the filaments contact each other, and wherein the networked ceramic nanofibers extend into the elongated pores and interlock with the elongated pores and surface roughness of the dimple such that the networked ceramic nanofibers are secured to the ceramic barrier coating.
1 more element
A repair process comprising:
- providing an airfoil that has a substrate and a ceramic barrier coating disposed on the substrate, wherein the ceramic barrier coating has a porous columnar microstructure that includes microstructural columns that define elongated pores there between and the ceramic barrier coating has a damaged region;
- abrading the damaged region to provide a dimple in the ceramic barrier coating, wherein a remaining region of the ceramic barrier coating adjacent the dimple remains intact;
- and
- depositing a patch of networked ceramic nanofibers in the dimple, wherein the networked ceramic nanofibers comprise filaments that are non-linear and intertwined so as to form a porous network, the filaments being bonded together at locations where the filaments contact each other, and wherein the networked ceramic nanofibers extend into the elongated pores and interlock with the elongated pores and surface roughness of the dimple such that the networked ceramic nanofibers are secured to the ceramic barrier coating.
1 more element
Dependencies are inferred from the claim text.