抄録
Precursors of carbon-containing SiC fibers (SiC-C fiber) were synthesized with high yield by the copyrolysis of poly (dimethylsilane) and 3.9-80wt% pitch. During copyrolysis the decomposition product of polysilane reacts with pitch molecule with no significant condensation among pitch molecules. SiC-C fibers were obtained by melt spinning of the precursors and heat-treatment up to 1400°C in vacuum. The tensile strength and Young's modulus of the SiC-C fiber decreased with increasing carbon content. The electric conductivity is two orders of magnitude larger than that of SiC fibers obtained from pure polycarbosilane.
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