Oxidation Properties of Three Dimensional (3-D) Carbon Fiber Preform Coated by SiC-SiO₂

Abstract:

A SiO2-SiC coating on 3-D carbon fiber perform (raw perform) was successfully prepared through several steps. The appearance and composition of the coating/3-D carbon fiber preform (coated perform=CP) was studied through IR, XRD and SEM. The isothermal weight-loss and non-isothermal thermogravimetric (TGA) were used to study the oxidation behavior of CP. The results showed that a uniform coating on every fiber of preform was achieved and the coating adhered well with fiber. The oxidation process of CP in isothermal condition was reaction-controlled in the first step, gas diffusion and reaction-controlled in the second step. The characteristic of the oxidation process in non-isothermal condition was self-catalytic.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 1693-1696
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.1693
• Online since: February 2007
• Authors: Peng Zhao Gao, Hong Jie Wang, Zhi Hao Jin
• Keywords: Reaction-Controlled, Self-Catalytic, SiO₂-SiC Coating, Thermo Gravimetric Analysis (TGA)

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