High temperature oxidation protection for carbon-carbon composites
AssigneeGoodrich Corporation
InventorAtta Khan
Life of this patent
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Abstract
A method for forming an oxidation protection system on a composite structure is provided, which may comprise applying a ceramic layer slurry to the composite structure, wherein the ceramic layer slurry may comprise aluminum and silicon in a solvent or carrier fluid; heating the composite structure to form a ceramic layer on the composite structure, wherein the ceramic layer may comprise aluminum nitride; applying a sealing slurry to the composite structure, wherein the sealing slurry may comprise a sealing pre-slurry composition and a sealing carrier fluid, wherein the sealing pre-slurry composition may comprise a sealing phosphate glass composition; and/or heating the composite structure to form a sealing layer on the composite structure.
Claims12
A method for forming an oxidation protection system on a composite structure, comprising:
- applying a ceramic layer slurry to the composite structure, wherein the ceramic layer slurry comprises (i) at least one of elemental aluminum or an alloy of aluminum, and (ii) at least one of elemental silicon or an alloy of silicon, in a solvent or carrier fluid;
- heating the composite structure to above 1000° C. in an environment comprising nitrogen gas to form a ceramic layer on the composite structure, wherein the at least one of the elemental aluminum or the alloy of aluminum reacts with the nitrogen gas such that, as a result, the ceramic layer comprises aluminum nitride;
- applying a sealing slurry to the composite structure, wherein the sealing slurry comprises a sealing pre-slurry composition and a sealing carrier fluid, wherein the sealing pre-slurry composition comprises a sealing phosphate glass composition;
- and
- heating the composite structure to form a sealing layer on the composite structure.
Dependencies are inferred from the claim text.