Pyrocarbon (PyC) matrices were prepared in two kinds of quartz fiber preforms by chemical vapor infiltration (CVI), and then the fibers were leached by HF. Effects of CNTs on the microstructures and mechanical properties of the quartz fiber reinforced carbon composites and PyC matrices, as well as the interface behaviors of the fiber reinforced composites, were discussed. Randomly oriented CNTs reinforced PyC micro-composites account for the pseudo ISO structure and contribute to the mechanical properties of the PyC matrix. Relative strength between reinforcement and matrix and interface bonding significantly affect the mechanical behaviors of the quartz fiber reinforced pyrocarbon composites: Quartz fiber with low strength and strong interface bonding result in limited strengthening effect on flexural strength of the fiber reinforced composite; low strength unidirectional quartz fiber and weak interface bonding in a much stronger matrix result in limited strengthening effect on tensile strength of the composite.

通过化学气相渗透法（CVI）在两种石英纤维预制棒中制备热解碳（PyC）基质，然后用​​HF浸提纤维。讨论了碳纳米管对石英纤维增强的碳复合材料和PyC基体的微观结构和力学性能的影响，以及纤维增强的复合材料的界面行为。随机取向的CNTs增强的PyC微复合材料占伪ISO结构，并有助于PyC基质的机械性能。增强材料与基体之间的相对强度以及界面粘结会显着影响石英纤维增强的热解碳复合材料的力学性能：强度低且界面粘结性强的石英纤维对增强纤维的复合材料的弯曲强度产生有限的增强作用；