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A MoSi2-CrSi2-SiC-Si coating was prepared on the surface of carbon/carbon (C/C) composites by a two-step pack cementation method. The microstructure and oxidation behaviour of the coating were studied. These results illustrated that the coating could effectively protect C/C composites from oxidation from oxidation in air above 1600 K, due to the protection of the compound glass. The weight loss of the coated C/C specimens was only 0.4% after oxidation at 1873 K for more than 150 h. The coating lacked effective oxidation resistance for C/C composites from 800 to 1600 K, as no obvious glass layer covered the coating surface and the cracks cannot be sealed because of the high viscosity of the compound glass

Oxidation Behaviour and Mechansim of MoSi2-CrSi2-SiC-Si Coating for Carbon/Carbon Composites from Room Temperature to 1873 K

Oxidation Behaviour and Mechansim of MoSi₂-CrSi₂-SiC-Si Coating for Carbon/Carbon Composites from Room Temperature to 1873 K