Salt-fog corrosion behavior of C/SiC and its effect on ablation resistance
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第12期
论文作者：Su Cheng Xing Zhao Guang Yang Yiguang Wang
文章页码：2772 - 2777
摘 要：Carbon fiber-reinforced silicon carbide（C/SiC） composites are significantly important candidates for thermal protection materials. The corrosion mechanism of C/SiC composite materials is the basis of their optimization and application. In this study, structural evolution of C/SiC composites fabricated by chemical vapor infiltration was investigated in the salt-fog storage environment. Furthermore, the effect of salt-fog on their ablation behaviors under oxyacetylene flame environment was studied. The ablation morphologies and corrosion mechanisms of C/SiC composites were analyzed and discussed. The results indicated that silica layer with size of c.a. 20 nm was formed on the surface of composite. The extent of corrosion in salt fog was limited, and it had little effect on the ablation behavior of the C/SiC composites,as well on the tensile strength and bending strength.
Su Cheng，Xing Zhao，Guang Yang，Yiguang Wang
Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University
摘 要：Carbon fiber-reinforced silicon carbide（C/SiC） composites are significantly important candidates for thermal protection materials. The corrosion mechanism of C/SiC composite materials is the basis of their optimization and application. In this study, structural evolution of C/SiC composites fabricated by chemical vapor infiltration was investigated in the salt-fog storage environment. Furthermore, the effect of salt-fog on their ablation behaviors under oxyacetylene flame environment was studied. The ablation morphologies and corrosion mechanisms of C/SiC composites were analyzed and discussed. The results indicated that silica layer with size of c.a. 20 nm was formed on the surface of composite. The extent of corrosion in salt fog was limited, and it had little effect on the ablation behavior of the C/SiC composites,as well on the tensile strength and bending strength.
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