The paper deals with carbon/carbon composites (C/C) modified with a ceramic nanofiller designed for high temperature applications. The C/C samples were manufactured from a coal tar pitch precursor (CTP) modified with a silicon carbide in the form of nanopowder (SiC). Carbon fibers were used as a reinforcement. The composite samples containing differing amount of the ceramic nanofiller were manufactured. The mechanical properties, thermal conductivity and oxidation resistance of C/C composites before and after modification with nanoSiC were determined. The structure and microstructure of the composites were examined using X-ray diffraction and SEM with EDS technique. The presence of the ceramic nanoparticles in carbon matrix precursor decreased the total porosity of carbon composites and redistributed pore sizes after annealing to 1000 °C. CTP-derived carbon matrix was composed from two carbon components that differed in crystallographic parameters. Modified C/C composites performed distinctly higher mechanical properties, thermal conductivity and oxidation resistance in comparison with the pure carbon/carbon samples.

本文研究了用为高温应用设计的陶瓷纳米填料改性的碳/碳复合材料（C / C）。C / C样品是由煤焦油沥青前驱体（CTP）制成的，该前驱体经碳化硅以纳米粉（SiC）的形式改性。碳纤维用作增强材料。制造了包含不同量的陶瓷纳米填料的复合样品。测定了纳米SiC改性前后C / C复合材料的力学性能，导热系数和抗氧化性。使用X射线衍射和SEM和EDS技术对复合材料的结构和微观结构进行了检查。碳纳米管前体中陶瓷纳米粒子的存在降低了碳复合材料的总孔隙率，并在退火至1000°C后重新分配了孔径。CTP衍生的碳基质由晶体学参数不同的两个碳组分组成。与纯碳/碳样品相比，改性的C / C复合材料具有明显更高的机械性能，导热性和抗氧化性。