Oxidation Resistance of Carbon Composites by Silica Solution Impregnation

作者：Mahmoud Gamal^*; Luo Rui ying; Guo Lin

来源：Journal of Iron and Steel Research International, 2010, 17: 101-105.

• ceramic coatings
• impregnation
• carbon composites
• infrared spectroscopy
• X-ray diffraction

Carbon-carbon composites have been protected from oxidation by impregnation with hydrogel of TEOS. Drying, gelation, or chemical conversion produces solid layers on internal surfaces that can be decomposed or reacted by heating to form ceramic coatings. Multiple impregnation and heat treatment cycles are needed to produce continuous coatings of significant thickness. Morphology of impregnated C/C composites was observed using Scanning Electron Microscope. Phase composition and structure of these impregnated materials was studied by FTIR spectroscopy and X-ray diffraction (XRD). Oxidation resistance of the impregnated C/C composites was studied using the oxidation test in air from 50-1200 degrees C. Results showed that the impregnation of C/C composites with hydrogel of TEOS, improves the oxidation resistance of C/C composites at lower temperatures up to 750 degrees C.

• 出版日期2010-2
• 单位北京航空航天大学