Abstract
The purpose of this study was to investigate the preparation and properties of porous SiC fiber reinforced SiC matrix (SiC/SiC) composites. SiC/SiC composites were prepared by polymer impregnation pyrolysis (PIP) progress with polycarbosilane (PCS) as impregnate and SiC fiber as reinforcement. The pores of the composites were pre-introduced by regulating the distribution of yarns during the braiding of the fiber preform. The apparent porosity, pore structure and the tensile strength were studied and compared with the laser drilling composites. The results show that the properties of the composites pre-perforated by fiber preforms are superior to the composites drilled by laser.
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