CPC C23C 14/0635 (2013.01) [B64C 25/42 (2013.01); F16D 65/0025 (2013.01)] | 9 Claims |
1. A method of forming a B4C layer as a component of an oxidation protection system on a carbon-carbon composite material, the method comprising:
forming a liquid mixture comprising a boron-compound and a carbon-compound, wherein forming the liquid mixture comprises forming a solution by mixing the boron-compound into the carbon-compound, such that the boron-compound is a solute and the carbon-compound is a solvent, wherein the boron-compound is a precursor of boron carbide (B4C), the boron-compound comprising at least one of boric acid (H3BO3) and boria (B2O3) and wherein the carbon-compound comprises phenolic resin;
applying the liquid mixture on the carbon-carbon composite material, wherein the carbon-carbon composite material comprises a carbon densified carbon fiber preform; and
heating the carbon-carbon composite material after applying the liquid mixture on the carbon-carbon composite material to convert the boron-compound and the carbon-compound of the liquid mixture to boron carbide (B4C) and form a boron carbide (B4C) layer over the carbon-carbon composite material,
wherein heating the carbon-carbon composite material includes heating to between about 1800 degrees Celsius and about 2000 degrees Celsius.
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