A novel method has been developed to fabricate carbon fiber reinforced SiC (C_f/SiC) composites by combining 3D printing and liquid silicon infiltration process. Green parts are firstly fabricated through 3D printing from a starting phenolic resin coated carbon fiber composite powder; then the green parts are subjected to vacuum resin infiltration and pyrolysis successively to generate carbon fiber/carbon (C_f/C) preforms; finally, the C_f/C preforms are infiltrated with liquid silicon to obtain C_f/SiC composites. The 3D printing processing parameters show significant effects on the physical properties of the green parts and also the resultant C_f/C preforms, consequently greatly affecting the microstructures and mechanical performances of the final C_f/SiC composites. The overall linear shrinkage of the C_f/SiC composites is less than 3%, and the maximum density, flexural strength and fracture toughness are 2.83 ± 0.03 g/cm³, 249 ± 17.0 MPa and 3.48 ± 0.24 MPa m^1/2, respectively. It demonstrates the capability of making near net-shape C_f/SiC composite parts with complex structures.

通过结合3D打印和液态硅渗透工艺，开发了一种新颖的方法来制造碳纤维增强SiC（C _f / SiC）复合材料。首先通过3D打印从原始的酚醛树脂涂覆的碳纤维复合粉末中制造出绿色零件；然后将未加工的零件依次进行真空树脂渗透和热解，以生成碳纤维/碳（C _f / C）预成型坯。最后，用液态硅渗透C _f / C预成型坯以获得C _f / SiC复合材料。3D打印处理参数对生坯的物理性能以及最终的C _f均显示出显着影响/ C预成型坯，因此极大地影响了最终C _f / SiC复合材料的微观结构和力学性能。的C的整体线性收缩_˚F / SiC复合材料是小于3％，并且最大密度，弯曲强度和断裂韧性是2.83±0.03克/厘米³，249±17.0兆帕和3.48±0.24兆帕米^1/2，分别。它展示了制造具有复杂结构的近净形C _f / SiC复合零件的能力。