Advanced oxidation protection system with broad temperature range capability

A method for forming an oxidation protection system on a carbon-carbon composite structure, comprising:

• applying a boron slurry to the carbon-carbon composite structure, wherein the boron slurry comprises a boron compound, a first glass mixture, a first glass former, a first glass modifier, and a first carrier fluid, the first glass mixture including a first glass compound and a second glass compound, the first glass compound having a first viscosity-temperature profile that is at least one order of magnitude below a second viscosity-temperature profile of the second glass compound, wherein the first glass compound includes a first viscosity at 1,250° F. (677° C.) between 1.0×104 Pa·S and 1.0×106 Pa·S, and wherein the second glass compound includes a second viscosity at 1,250° F. (677° C.) between 1.0×108 Pa·S and 1.0×1010 Pa·S;
• applying a silicon slurry to the carbon-carbon composite structure, wherein the silicon slurry comprises a silicon compound, a third glass compound, a second glass former, a second glass modifier, and a second carrier fluid;
• and
• heating the carbon-carbon composite structure.