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US 2022/0088674 A1Published application
Castings and Manufacture Methods
AssigneeRaytheon Technologies Corporation
InventorsThomas W. Prete, John J. Marcin, JR., Russell A. Beers
Life of this patent
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Abstract
A method includes casting a metallic material (56) in a mold (20) containing a core, the core having a substrate (40, 44) coated with a coating (42). A removing of the metallic material from the mold and decoring leaves a casting having a layer formed by the coating. The coating has a ceramic having a porosity in a zone (50) near the substrate less than a porosity in a zone (52) away from the substrate.
Claims21
A coated casting comprising:
- a metallic casting having an airfoil and one or more internal passageways extending through the airfoil;
- and
- a ceramic lining along the passageways,
- wherein:
- the ceramic lining has a porosity in a zone near the casting greater than a porosity in a zone away from the casting.
2 more elements
(canceled)
Dependencies are inferred from the claim text.