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US 2020/0048151 A1Published application
High temperature oxidation protection for composites
AssigneeGoodrich Corporation
InventorSteven A. Poteet
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Abstract
An oxidation protection system disposed on a substrate is provided, which may comprise a base layer comprising a first pre-slurry composition comprising a first phosphate glass composition, and/or a sealing layer comprising a second pre-slurry composition comprising a second phosphate glass composition and a strengthening compound comprising boron nitride, a metal oxide, and/or silicon carbide.
Claims20
A method for forming an oxidation protection system on a composite structure, comprising:
- forming a first slurry by combining a first pre-slurry composition with a first carrier fluid, wherein the first pre-slurry composition comprises a first phosphate glass composition;
- applying the first slurry to the composite structure;
- heating the composite structure to a temperature sufficient to form a base layer on the composite structure;
- forming a second slurry by combining a second pre-slurry composition with a second carrier fluid, wherein the second pre-slurry composition comprises a second phosphate glass composition and a strengthening compound comprising at least one of boron nitride, a metal oxide, or silicon carbide;
- applying the second slurry to the composite structure;
- and
- heating the composite structure to a temperature sufficient to form a sealing layer on the composite structure.
4 more elements
An oxidation protection system disposed on an outer surface of a substrate, comprising:
- a base layer comprising a first pre-slurry composition comprising a first phosphate glass composition;
- and
- a sealing layer comprising a second pre-slurry composition comprising a second phosphate glass composition and a strengthening compound comprising at least one of boron nitride, a metal oxide, or silicon carbide, wherein the sealing layer is disposed on the base layer.
An aircraft brake disk, comprising:
- a carbon-carbon composite structure comprising a non-wear surface;
- and
- an oxidation protection system disposed on the non-wear surface, the oxidation protection system comprising:
- a base layer comprising a first pre-slurry composition disposed on the non-wear surface, wherein the first pre-slurry composition comprises a first phosphate glass composition;
- and
- a sealing layer comprising a second pre-slurry composition comprising a second phosphate glass composition and boron nitride disposed on the base layer, wherein the sealing layer comprises between 5 and 15 percent weight boron nitride.
3 more elements
Dependencies are inferred from the claim text.