Abstract Scope |
In this work, a novel strategy for fabricating SiC composites via selective laser sintering (SLS) of carbon fiber combined with liquid silicon infiltration is reported. The SLS-powder composed of chopped carbon fiber (Cf) and phenolic resin (PR) mixed powder, in addition to a Cf/PR green body with a tailored microstructure was obtained by SLS. The printed green body with a low PR content (25vol%) is found to exhibit high printing stability and excellent strength. Finally, high-performance SiC composites are prepared via the liquid silicon infiltration, the density, flexural strength, elastic modulus, and fracture toughness being 2.719±0.008 g/cm3, 266±5 MPa, 248±3 GPa, and 2.87±0.07 MPam1/2, respectively. This strategy demonstrates an efficient approach to near-net shape high performance SiC composites with a designable complex structure. |