Controlling the Si/C ratio in SiC matrix based on the modified polymethysilane for C/C–SiC composites with enhanced mechanical properties
Mingdong Liao,
Xiebo Hu,
Chenghao Zhong
et al.
Abstract:Fabricating SiC matrix with controllable Si/C ratio for C/C-SiC composites via precursor infiltration and pyrolysis is difficult to realize due to the absence of suitable precursors. Here, SiC precursors with Si-rich (Si/C = 1.23), nearstoichiometric (Si/C = 1.01), and C-rich (Si/C = 0.88) pyrolyzed ceramics at 1200 ℃ were successfully synthesized by the novel modification of polymethysilane. The structure and ceramization of synthesized SiC precursors were studied, and C/C-SiC composites with similar Si/C rat… Show more
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