흑연의 내산화성 증진을 위한 실험 계획법에 따른 탄화규소 코팅에 관한 연구

Abstract

A study of the pack cemcented SiC coating on graphite was performed and the process conditions were evaluated by means of experimental design. The content of Si, P2O5, B and Al2O3 reaction temperature, reaction time and acid treatment wast tested as the experimental variables. The results were analyzed and compared by the characteristic value of 10% weight loss by oxidation. The acid treatment exhibited the most effective anti-oxidation property and the optimum conditions were the powder composition of 20% Si, 3% B and 77% SiC, the reaction temperature of 1550°C for 7 hours with phosphoric acid treatment. The pack coating performed under this condition improved the 10% weight loss oxidation temperature by 514°C compared to the bare graphite.