Preparation, microstructure and oxidation resistance of SiCN ceramic matrix composites with glass-like carbon interface
Journal Title: Carbon - Science and Technology - Year 2009, Vol 2, Issue 1
Abstract
Glass-like carbon (GC) interface was successfully introduced into carbon fiber-reinforced SiCN ceramic matrix composite (C/GC/SiCN) by polymer infiltration and pyrolysis using phenolic resin as precursor. In order to highlight the Oxidation resistance of GC interface, the Oxidation behavior of GC, carbon fiber (Cf) containing approximately 0.3 μm GC coating and C/GC/SiCN was investigated by means of weight changes and residual strength ratio before and after oxidizing, and the results were also compared with that of Cf containing Pyrocarbon (PyC) coating and C/PyC/SiCN composite. Scanning electron microscopy displays homogeneous, adherent GC coating on Cf. Weight loss rate of Cf containing GC coating is lower than that of Cf containing PyC coating. The residual stress ratio of C/GC/SiCN was higher than that of C/PyC/SiCN. The results indicate that GC interface can improve anti-oxidation of Cf-reinforced composite than PyC interface.
Authors and Affiliations
Yi Xia, Sheng-Ru Qiao, Qiang-Qiang Wang, Cheng-Yu Zhang, Jun-Tao Hou
Keywords
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