Influence of SiC Coating on the Oxidation Behavior of PAN Carbon Fiber at Elevated Temperatures
SiC was coated on the surface of carbon fibers substrate by a reaction between thermally evaporated silicon and carbon at 1600℃. SEM and XRD analyses show that the coatings obtained are composed of SiC grains and micro-crystals. The oxidation behavior of coated samples was investigated,and then their oxidation mechanisms were studied. The weight results show that carbon fibers loss weight after oxidation. However,carbon fibers with SiC coating gained weight after oxidation and the weight gain increased with the treatment temperature. The oxidation steps included oxidation of substrate by diffusion of oxygen through coating cracks,the reaction of oxygen and SiC coating and oxidation of coating by diffusion of oxygen through the oxide film. It can be concluded that SiC coatings which were prepared on carbon fibers can improve the oxidation resistance of carbon at elevated temperatures.
SiC PAN carbon fibers Coating Oxidation behavior
Ye Li Lina Wang Weihui Xie Jianjun Chen
Key Laboratory of Advanced Textile Materials and Manufacturing Technology,Ministry of Education of China,Zhejiang Sci-Tech University,Hangzhou 310018,China
国际会议
杭州
英文
54-58
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）