Microstructure and Mechanical Properties of 2D C/SiC Composites Fabricated by CVI Combining with Slurry Infiltration

2D C/SiC composites were fabricated by chemical vapor infiltration(CVI)combining with slurry infiltration(SI)process.Effects of content of SI-SiC particles on the microstructure and mechanical performances were investigated.The particles can be infiltrated into inter-bundle pores of fiber preform after CVI SiC for 80h.The density and mechanical strength of the as-fabricated composites increase not only with increasing the CVI SiC time before SI process,but also with decreasing content of the particles.The SI process greatly reduces the interlaminar shear strength,and has little influence on the tensile strength.