Thermal Properties of Carbon Fiber Reinforced Mullite Composites Derived from Sol-Gel

摘要：

　　Mullite matrix composites with laminated and stitched carbon fiber cloth preform as reinforcement were fabricated via the route ofinfiltration-drying-heat treatment using Al2O3-SiO2 sol as raw materials.Thermal properties from room temperature to 1673K of the composites were investigated.The coefficient of thermal expansion (CTE) increases first and then decreases, and reaches a maximum of 4.83 × 10-6K-1 at 1273K.As a result of the further sintering of matrix, the CTE is negative at above 1300℃.The specific heat capacity increases to the maximum of 1.547J·g-1 ·K-1 at 1473K and remains stable at above 1473K, with a minimum of 0.756J·g-1·K-1 at room temperature.The thermal diffusivity decreases from 1.1mm2·s-1 at room temperature to 0.707 mm2·s-1 at 973K as the temperature was elevated, and remains stable at above 973K.On the contrary, the thermal conductivity is improved with increasing temperature on the whole and varies from 1.859W·m-1·K-1 at room temperature to 2.325W·m-1 ·K-1 at 1473K.

关键词： Thermal properties Mullite composites Sol-gel

作者: Kuan-hong Zeng Zhong-quan Li Song-lin Liang Lv Xiao Qing-song Ma

作者单位: Science and Technology on Advanced Ceramic Fiber & Composites Laboratory, National University of Def Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, P.R.China

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 461-465

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）