Method of applying oxidation protection coating to carbon fibers
AssigneeGoodrich Corporation
InventorsSteven A. Poteet, Gavin Charles Richards
Life of this patent
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Abstract
A method for coating a carbon fiber for a composite structure may comprise applying a slurry onto a surface of the carbon fiber, wherein the slurry is a sol gel comprising a metal precursor and a carrier fluid, and heating the carbon fiber to a temperature sufficient to form a sol gel-derived layer on the carbon fiber. The slurry may comprise a metal precursor such as a metal salt or a metal alkoxide. The sol gel-derived layer may help prevent the carbon fiber from oxidizing.
Claims11
A method for coating a fiber for a composite structure, comprising:
- applying a slurry comprising tetraethylorthosilicate (TEOS) onto the fiber;
- forming an oxidized polyacrylonitrile fiber (OPF) preform from the fiber;
- carbonizing the OPF preform and the slurry;
- heating the slurry to a temperature sufficient to form a protective layer on the fiber;
- and
- condensing the slurry into a silicon oxide.
A method for manufacturing a composite structure, comprising:
- forming an oxidized polyacrylonitrile fiber (OPF) preform from a fiber;
- carbonizing the OPF preform;
- applying a slurry to the carbonized OPF preform;
- heating the carbonized OPF preform and the slurry to a temperature sufficient to form a protective layer on the fiber;
- and
- densifying the carbonized OPF preform to form the composite structure.
A method for manufacturing a composite structure, comprising:
- forming an oxidized polyacrylonitrile fiber (OPF) preform from a fiber;
- coating the OPF preform with a slurry;
- carbonizing the coated OPF preform;
- heating the carbonized OPF preform and the slurry to a temperature sufficient to form a protective layer on the carbonized OPF preform;
- and
- densifying the carbonized OPF preform to form the composite structure.
Dependencies are inferred from the claim text.