Densification Mechanism of C_f/SiC Composites prepared by Precursor Pyrolysis and Hot Pressing

In this paper,the densification mechanism of C f/SiC,prepared by precursor Pyrolysis and Hot pressing,was investigated.The results indicated that the composites were densified primarily through liquid phase sintering.Because the pyrodlysis of polycarbosilane(PCS)was beneficial to the formation of sintering aiding liquid phase and led to the formation of a lot of nano SiC particles,the composites could be well densifed at lower processing temperature.Consequently,the composites exhibited better mechanical properties.