Oxidation resistance of two dimensional C/SiC composite coated with Si-B-C ceramic

Xinzhang Zuo, Litong Zhang, Yongsheng Liu, Laifei Cheng, Huiling Gong

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

Two dimensional C/SiC composite coated with Si-B-C ceramic was prepared via chemical vapor deposition (CVD). Properties and structure evolution and self-healing mechanisms of the C/SiC composite were studied after oxidation for 10 h during 700-1200°C. At the same time, the evolution of morphologies, composition and phase for Si-B-C ceramic were also investigated. The experimental results show that the oxidation of Si-B-C ceramic accelerates with the temperature increasing, however, the oxidation scale is shallow and no more than 7 μm. With the temperature increasing, viscosity of borosilicate glass oxidized from Si-B-C ceramic reduces but volatilization accelerates. When the temperature increases to 1200°C, SiO2 crystallizes from borosilicate glass. C/SiC composite coated with Si-B-C ceramic shows an excellent oxidation resistance. Mass loss increases with temperature increasing, which is only 0.47% after oxidation for 10 h at 1200°C. Furthermore, the strength retention ratio is 91.6% at 1000°C, higher than that at other temperatures. The main mechanisms for excellent oxidation resistance of C/SiC composite is that borosilicate glass oxidized from Si-B-C ceramic can seal cracks in composite effectively.

源语言英语
页(从-至)100-106
页数7
期刊Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
30
3
出版状态已出版 - 6月 2013

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