Ternary Cu‐Fe‐Si alloy were applied to modify tribological behavior of carbon fiber/carbon‐silicon carbide (C_f/C‐SiC) composites by reactive melt infiltration. Microstructures, physical properties and tribological properties on a full‐scale train brake test rig of the modified composites were studied. Results indicate that both Cu and Fe‐Si alloy as matrices lead to significantly enhanced thermal conductivity and compressive strength for C_f/C‐SiC composites. Moreover, the average friction coefficient of the modified composites is between 0.25 and 0.55, which is higher than that of copper metal matrix composites. In addition, the average volume wear rate of the modified composites is only 0.168 cm³/MJ. The C_f/C‐SiC composites modified by Cu and Fe‐Si alloy with improved physical properties and tribological properties meet the technical requirement and show high application potential in express train brake systems.

中文翻译：

---

铜和铁硅基体定制的Cf / C-SiC复合材料的微观结构和摩擦学行为

运用三元Cu-Fe-Si合金通过反应性熔体渗透来改变碳纤维/碳-碳化硅（C _f / C-SiC）复合材料的摩擦学性能。在改性复合材料的全尺寸火车制动试验台上，研究了其微观结构，物理性能和摩擦学性能。结果表明，Cu和Fe-Si合金都可以显着提高C _f / C-SiC复合材料的导热性和抗压强度。而且，改性复合材料的平均摩擦系数在0.25至0.55之间，高于铜金属基复合材料的平均摩擦系数。另外，改性复合材料的平均体积磨损率仅为0.168cm ³ / MJ。的C _˚F由Cu和Fe-Si合金改性的/ C-SiC复合材料具有改善的物理性能和摩擦学性能，可以满足技术要求并在快速列车制动系统中显示出很高的应用潜力。