초록 ▼

Coated articles (19) that comprise components, made of carbon fiber or carbon-carbon composites which may be configured, for example, as aircraft landing system brake discs. The components (10) are coated with a system that includes a phosphorus-containing undercoating (11) having a specified formul

Coated articles (19) that comprise components, made of carbon fiber or carbon-carbon composites which may be configured, for example, as aircraft landing system brake discs. The components (10) are coated with a system that includes a phosphorus-containing undercoating (11) having a specified formulation and a boron-containing overcoating (12) having specified formulation. The coated articles of the invention, e.g., aircraft brake discs, are protected against catalytic oxidation when the article is subjected to temperatures of 800° C. (1472° F.) or greater. Also, a method of protecting a component made of a carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation (e.g., catalyzed by de-icer compositions) and high temperature non-catalytic oxidation.

대표청구항 ▼

1. A method of protecting a component made of carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation and high temperature non-catalytic oxidation, which method comprises:covering said composite with an undercoating comprising ions formed from 10-80 wt % H2O, 20-70 wt % H3

1. A method of protecting a component made of carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation and high temperature non-catalytic oxidation, which method comprises:covering said composite with an undercoating comprising ions formed from 10-80 wt % H2O, 20-70 wt % H3PO4, 0.1-25 wt % alkali metal mono-, di-, or tri-basic phosphate, 0-2 wt % B2O3, and 0-25 wt % MnHPO4.1.6H2O, 0-30 wt % AlPO4, and 0-10 wt % Zn3(PO4)2, provided that at least one of AlPO4, MnHPO4.1.6H2O, and Zn3(PO4)2 is present, said undercoating having a thickness of approximately 1-10 mil, and subsequently covering the undercoating with a boron-containing glass overcoating comprising boron nitride, said overcoating having a thickness of approximately 1-10 mil. 2. The method of claim 1, wherein the catalytic oxidation is oxidation that is catalyzed by potassium acetate.3. The method of claim 1, wherein said component is configured as an aircraft landing system brake disc.4. The method of claim 1, wherein said phosphorus-containing undercoating comprises ions formed from 20-50 wt % H2O, 30-55 wt % H3PO4, 0-15 wt % MnHPO4.1.6H2O, 2-15 wt % AlPO4, 0.5-2 wt % B2O3, 1-7 wt % Zn3(PO4)2, and 10-20 wt % KH2PO4.5. The method of claim 1, wherein said boron-containing glass overcoating also comprises boron carbide and/or elemental boron.6. The method of claim 5, wherein the formulation used to make the boron-containing glass overcoating comprises ions formed from 20-60 wt % H2O, 25-50 wt % H3PO4, 2-20 wt % alkali metal hydroxide, 1-10 wt % alkali or alkaline earth metal mono-, di-, or tri-basic phosphate, 1-10 wt % boron nitride, and one or both of 1-10 wt % elemental boron and/or 1-10 wt % boron carbide.7. The method of claim 1, wherein the undercoating is annealed to the carbon composite at a temperature in the range of 250-900° C. (482-1652° F.).8. The method of claim 1, wherein the glass overcoating is annealed to the undercoating at a temperature in the range of 250-650° C. (482-1202° F.).9. A method of protecting a component made of carbon fiber or carbon-carbon composite simultaneously against catalytic oxidation and high temperature non-catalytic oxidation, which method comprises:covering said composite with an undercoating comprising ions formed from 10-80 wt % H2O, 20-70 wt % H3PO4, 0.1-25 wt % alkali metal mono-, di-, or tri-basic phosphate, 0-2 wt % B2O3, and 0-25 wt % MnHPO4.1.6H2O, 0-30 wt % AlPO4, and 0-10 wt % Zn3(PO4)2, provided that at least one of AlPO4, MnHPO4.1.6H2O, and Zn3(PO4)2 is present, said undercoating having a thickness of approximately 1-10 mil, and subsequently covering the undercoating with a boron-containing glass overcoating comprising boron nitride, said overcoating a thickness of approximately 1-10 mil and subsequently subjecting the undercoated and overcoated component to potassium acetate under oxidation conditions, wherein said component is protected simultaneously against catalytic oxidation and high temperature non-catalytic oxidation.