Effects of fabric architectures on the thermal expansion coefficient and the thermal diffusivity of carbon fiber reinforced silicon carbide composites

Kaiyuan Li, Yongdong Xu, Litong Zhang, Laifei Cheng, Junqiang Ma, Hong Li, Qing Zhang

科研成果: 期刊稿件文章同行评审

12 引用 (Scopus)

摘要

The thermal expansion coefficient and the thermal diffusivity of 2 dimensional (D), 2.5D and 3D carbon fiber reinforced silicon carbide (C/SiC) composites were tested from room temperature to 1400°C using a thermal dilatometer and laser flash apparatus. The microstructure was observed by scanning electron microscopy and light microscopy. The results show that at low temperature (below 700°C), the longitudinal and transversal thermal expansion coefficients of all these C/SiC composites increase slowly as the temperature increases, followed by fluctuations of different degrees after 700°C. At high temperature above 700°C, the longitudinal thermal expansion coefficients of all these materials and the transversal coefficient of the 2D C/SiC composite decrease as the temperature increases, but the transversal thermal expansion coefficients of the 2.5D and 3D C/SiC composites increase sharply as the temperature increases. The thermal diffusivity of all these composites decreases as the temperature increases, and the thermal diffusivity of the 3D C/SiC composite is the highest, it is 1-1.2 and 1.4-2 times higher than the 2.5D and 2D C/SiC composites respectively.

源语言英语
页(从-至)1564-1569+1576
期刊Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
36
11
出版状态已出版 - 11月 2008

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