Patent ID: 7641941
Filing Date: 2010-01-05
Classification: C04B,C23C,F16D,Y10T

Abstract:
1. A method of inhibiting oxidation of a porous carbon-carbon composite comprising: imparting hydrolytic stability to the carbon-carbon composite by contacting the carbon-carbon composite with an oxidation inhibiting composition comprising phosphoric acid or an acid phosphate salt, at least one aluminum salt, and at least one additional metal salt, the additional metal salt comprises at least one of a magnesium salt, zinc chloride, iron nitrate, and tin chloride, wherein the oxidation inhibiting composition has a metal to phosphate atomic ratio of 0.26 to 0.4, the oxidation inhibiting composition penetrating at least some of the pores of the carbon-carbon composite; and heating the carbon-carbon composite at a temperature sufficient to form a deposit from the oxidation inhibiting composition within at least some of the penetrated pores of the carbon-carbon composite.