Microstructures and properties of Cf/TiC/Cu composites prepared by hot-pressed sintering

The Cf/TiC/Cu composites were prepared by the hot-pressed sintering. The mechanism of interface reaction between copper and carbon fiber(Cf) and the microstructure of composites were studied. The effects of Cf content on the density and bending strength of Cf/TiC/Cu composites were investigated. The results indicate that the transition layer with TiC as the main phase surrounding the carbon fiber is generated due to the reaction between titanium dissolved in the liquid copper and carbon in the ternary system of Cu-C-Ti. A film of Ti-Cu compounds maybe covers the side of the transition layer near the liquid copper, which tightly combines TiC with copper and improves the combination between copper and carbon fiber, thus the properties of Cf/TiC/Cu composites are improved. When the Ti content is certain, the properties of Cf/TiC/Cu composites get worse with the Cf content(mass fraction) increasing. When the Cf content is 5%, the synthetic properties of Cf/TiC/Cu composites are the best, the resistivity is 0.054 μΩ·m, the bending strength parallel to the pressure direction is 237.90 MPa, and the bending strength perpendicular to the pressure direction is 237.44 MPa.