用扫描电镜观察了碳-碳复合材料的拉伸样品及烧蚀样品,发现中强度碳纤维在复合过程中,内部结构发生了显著变化;同时对基体碳的剥蚀方式进行了分析;观察了纤维中杂质对烧蚀性能的影响。 Scanning electron microscope (SEM) was used to observe the tensile specimens and ablated specimens of carbon-carbon composites. It was found that the internal structure of the medium-strength carbon fibers changed significantly during the composites. At the same time, the mode of substrate carbon denudation was observed. Impurities on the ablation performance.