中文摘要：

采用单向加压浸渍、加压固化和碳化制备了密度为1.20 g/cm3的多孔碳纤维增强碳(carbon fiber reinforced carbon,C/C)复合材料,然后利用反应熔体浸渗法制备了密度为2.11 g/cm3的低成本三维针刺碳纤维增强碳化硅(carbon fiber reinforced silicon carbide,C/SiC)刹车材料,研究了材料的微结构和摩擦磨损性能。结果表明:随刹车速度升高,刹车盘的平均磨损率逐渐升高,而平均摩擦系数先升高后降低,刹车速度为15 m/s时,摩擦系数达到最大值0.57。低速刹车时摩擦系数曲线光滑、平稳上升;高速时曲线出现波动,存在'翘尾'。低速刹车时磨屑为大颗粒,摩擦面上犁沟明显;高速时宏观犁沟消失,微米级磨屑弥散分布于摩擦面。

英文摘要：

A carbon fiber reinforced carbon(C/C) composite with density of 1.20 g/cm3 was prepared by single-direction pressure infiltration in combination with pressure curing and carbonization;then three dimensional needle-punched carbon fiber reinforced silicon carbide(C/SiC) braking material with a density of 2.11 g/cm3 was prepared by reaction melt infiltration.The friction and wear 15 m/s and then falls.The COF curve rises smoothly and stably at low braking speed;however,it shows obvious vibration at high proper...