中文摘要：

采用普通碳毡作为增强体，丙烯作为碳源气体，氢气作为稀释气体，在自制的化学气相沉积炉中使用多元物理场化学气相渗透工艺（MFCVI）制备了C／C复合材料。根据不同的工艺条件设计了一组正交实验，以最终密度和石墨化度为指标对材料的制备过程进行了优化。结果表明，在沉积控制温度650℃、丙烯分压12kPa、总气流量为40mL／s、总压力为20kPa条件时，在15h沉积时间内可以获得较好的综合性能指标。验证实验结果表明，在上述实验条件下，材料的密度达到1．70g／cm^3，石墨化度可达67．1％，密度分析结果表明，其密度分布呈现两边高中间低的特征，材料的密度分布可以满足应用要求。

英文摘要：

With propylene as carbon source, carbon felt as porous perform and hydrogen as diluent gas, C/C composites were fabricated by Multi-physics Field Chemistry Vapor Infiltration （MFCVI） process in a home-made chemical vapor deposition furnace. A set of orthogonal experiments were designed according to different process conditions. The fabrication process was optimized with the bulk density and graphitization degree as indexes. The results showed the best general indexes could be achieved in 15 hrs under the conditions of deposition temperature of 650℃, propylene partial pressure of 12 kPa, gas flux of 40 mL/s and total pressure of 20 kPa. The verification experiment indicated that under the above mentioned conditions the bulk density and graphitization degree reached to 1.70 g/cm^3 and 67.1%, respectively. The density analysis results revealed that the density distribution was in a state with both sides higher than the center part. The density distribution can meet the application requirements.