High temperature metallic seal
OwnerD. More, Amitava Datta +1inventors
InventorsD. More, Amitava Datta, Peter Amos
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Abstract
A metallic seal includes a cold formed substrate layer and one or more additional layers. At least one of the layers offers improved resistance to high temperature stress relaxation.
Claims13
A process for manufacturing a seal for sealing between interior and exterior volumes when held under compression, comprising:
- cold forming an annular first seal layer;
- and
- applying a second layer to a first surface of the first layer via a process selected from the group consisting of:
- thermal spray of molten alloy droplets and powder;
- thermal spray of creep resistant alloys with ceramic particles;
- vapor deposition;
- slurry coating of ceramics and curing at elevated temperatures;
- electroforming of high temperature alloys;
- and
- combinations thereof.
A process for manufacturing a seal having a central longitudinal axis and forming a seal between interior and exterior volumes when held under compression between opposed first and second parallel faces of respective first and second flanges, comprising:
- cold forming an annular first seal layer from a refractory material;
- and
- applying an oxidation resistant coating to the first layer.
A process for manufacturing an article, comprising:
- cold forming a substrate from a first nickel- or cobalt-based superalloy;
- and
- applying a coating of a γ′ hardened second nickel-based superalloy to the substrate.
Dependencies are inferred from the claim text.