Carbon fiber-reinforced ceramicizable phenolic resin matrix composites have been widely used in the field of thermal protection materials. In this paper, the ZrO_2f-coated C_f (ZrO_2f/C_f) hybrid fibrous reinforcements were designed to improve oxidation resistance of carbon fiber and ceramicizable composites reinforced by ZrO_2f/C_f hybrid fibrous reinforcements were prepared to investigated oxidation resistance and mechanical properties of the composites at high temperature. The results show that ZrO_2f/C_f hybrid fibrous reinforcements have good thermal stability and high oxidation resistance, and its ceramicizable composites have good bending strength at high temperature. Weight loss rate of the composites is only 21 %, and bending strength can be as high as 39 MPa when ablation time was 12 min at 1400 °C.

碳纤维增强的可陶瓷化酚醛树脂基复合材料已被广泛用于热防护材料领域。本文设计了ZrO _2f包覆的C _f（ZrO _2f / C _f）混杂纤维增强材料，以改善碳纤维的抗氧化性，并制备了ZrO _2f / C _f混杂纤维增强材料增强的可陶瓷化复合材料，以研究其抗氧化性和复合材料在高温下的机械性能。结果表明ZrO _2f / C _f混合纤维增强材料具有良好的热稳定性和高抗氧化性，其可陶瓷化复合材料在高温下具有良好的弯曲强度。复合材料的失重率仅为21％，在1400°C下烧蚀时间为12分钟时，弯曲强度可以高达39 MPa。