Abstract:Carbon/Carbon (C/C) composites are prepared by resin impregnation-pyrolysis using three dimensional needle-punched carbon fiber preform, and Carbon/Silicon Carbide(C/SiC) composites are produced with reactive melt infiltration (RMI). The effect of resin impregnation cycles on the microstructure characteristics of C/C composites and C/SiC composites are investigated.