This work reports the effect of TiC volume fractions on hardness of TiC/TiCu/C composites synthesized through in situ reactive infiltration of Ti-Cu alloy into porous carbon preforms prepared by 3 D-printing. Reactive melt infiltration of the alloy at 1100 °C under argon into C-preforms with different porosities resulted in materials composed of TiC, Cu-rich intermetallic matrix (Ti₃Cu₄) and residual carbon. The microstructure consists of TiC grains distributed along the Cu-Ti/C boundary. The hardness of TiC/Ti₃Cu₄/C composites could be tailored by the TiC volume fraction and the distribution in the composites, which are determined by the processing parameters and the initial porosity of the carbon templates in 3 D-printing stage. The hardness of the produced composites ranges from 350 HV to 570 HV and could be tailored by the TiC volume fraction and distribution in the composites, which are determined by the processing parameters and the initial porosity of the carbon-preforms.

这项工作报告了 TiC 体积分数对 TiC/TiCu/C 复合材料硬度的影响，该复合材料是通过Ti-Cu 合金原位反应渗透到 3D 打印制备的多孔碳预制件中而合成的。合金在 1100 °C 下在氩气下反应熔体渗透到具有不同孔隙率的 C 预制件中，导致材料由 TiC、富铜金属间基体 (Ti ₃ Cu ₄ ) 和残余碳组成。显微组织由沿 Cu-Ti/C 边界分布的 TiC 晶粒组成。TiC/Ti ₃ Cu ₄的硬度/C 复合材料可以通过 TiC 体积分数和复合材料中的分布来定制，这些分布由 3D 打印阶段的加工参数和碳模板的初始孔隙率决定。生产的复合材料的硬度范围从 350 HV 到 570 HV，可以通过复合材料中的 TiC 体积分数和分布进行调整，这由加工参数和碳预制件的初始孔隙率决定。