Preparation and properties of the three-dimensional highly thermal conductive carbon/carbon-silicon carbide composite using the mesophase-pitch-based carbon fibers and pyrocarbon as thermal diffusion channels

The novel three dimensional highly thermal conductive carbon/carbon-silicon carbide (C/C-SiC) composite was successfully prepared using the mesophase-pitch-based carbon fibers and pyrocarbon as the thermal diffusion channels. The results show that the highly thermal conductive C/C-SiC composite with 221.1 W m- 1K-1 in the ablation direction exhibits a smaller temperature gradient, and the surface temperature is 470 ?C lower than that of the lowly thermal conductive C/C-SiC composite. The mass and linear ablation rates of the highly thermal conductive C/C-SiC composite are 0.56 mg?cm- 2 s- 1 and 0.11 ?m?s- 1, respectively.

Automated summary

The novel three dimensional highly thermal conductive C/C-SiC composite, prepared using mesophase-pitch-based carbon fibers and pyrocarbon, shows smaller temperature gradient and lower surface temperature compared to lowly thermal conductive C/C-SiC composite. The mass and linear ablation rates of the highly thermal conductive C/C-SiC composite are 0.56 mg?cm-2 s-1 and 0.11 μm?s-1, respectively.