Abstract:
The oxidation-resistant carbon material is prepared by (A) adding 1-6wt% silicon boride (SiB4) to base carbon material like graphite, carbon-carbon composite or carbon-reinforced plastics to produce carbon material; (B) placing silicon boride-containing carbon material in 75-100% phosphoric acid solution and heating at 100-400 deg.C for 1-5 hrs; and (C) drying the product at 100-500 deg.C under vacuum. The method is more effective and economical than the conventional method using oxidation inhibitors such as boron and silicon to improve oxidation resistance of carbon material.