Method of inhibiting catalyzed oxidation of carbon-carbon composites
AssigneeThe B.F. Goodrich Company
InventorEdward Roy Stover
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Abstract
This invention relates to a composition and method of inhibiting catalyzed oxidation of carbon-carbon composites. The invention includes compositions, capable of impregnating carbon-carbon composites. The invention also includes a method of inhibiting catalyzed oxidation of carbon-carbon composites comprising the steps of treating a carbon-carbon composite with the catalyzed oxidation inhibiting aqueous mixture, and heating the treated carbon-carbon composite to a temperature sufficient to remove water. Articles, including friction brakes, made by this method are also part of this invention. Brake lugs, and other exposed areas of aircraft braking systems have improved resistance to catalyzed oxidation.
Claims20
A method of inhibiting catalyzed oxidation of carbon-carbon composites comprising the steps of treating a porous carbon-carbon composite with a catalyzed oxidation inhibiting amount of an aqueous composition, capable of impregnating carbon-carbon composites, comprising (a) phosphoric acid, (b) (i) a metal phosphate or (ii) a combination of a zinc salt and an aluminum salt, and (c) a silicone surfactant and heating the treated carbon-carbon composite to a temperature sufficient to form a deposit from the aqueous composition within the pores of the carbon-carbon composite.
A method of inhibiting catalyzed oxidation of carbon-carbon composites comprising the steps of treating a carbon-carbon composite having pores with an aqueous composition comprising (a) phosphoric acid, (b) a combination of a zinc salt and an aluminum salt, and (c) a silicone surfactant and heating the treated carbon-carbon composite to a temperature sufficient to form a deposit from the aqueous composition within the pores of the carbon-carbon composite.
A method of inhibiting catalyzed oxidation comprising the steps of adding to a porous carbon article having structural integrity an amount of an aqueous inhibitor composition comprising (a) phosphoric acid, (b) (i) a metal phosphate or (ii) a combination of a zinc salt and an aluminum salt, and (c) a silicone surfactant sufficient to provide protection so that catalyzed oxidation will not damage the structural integrity of the carbon article and heating the carbon article to a temperature sufficient to form a deposit from the aqueous inhibitor composition within the pores of the carbon article.
A method of inhibiting catalyzed oxidation of carbon-carbon composites comprising the steps of treating a porous carbon-carbon composite with an aqueous composition consisting essentially of a metal phosphate oxidation inhibiting mixture, and either (a) a silicone surfactant or (b) a mixture of said silicone surfactant with wetting agents which do not separate from the aqueous composition before the aqueous composition is used to treat the carbon-carbon composite, and heating the treated carbon-carbon composite to a temperature sufficient to form a deposit from the aqueous composition within the pores of the carbon carbon composite.
Dependencies are inferred from the claim text.