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首页> 外文期刊>Advances in Chemical Engineering and Science >Thermal Conductivity of Carbon/Carbon Composites with the Fiber/Matrix Interface Modified by Silicon Carbide Nanofibers
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Thermal Conductivity of Carbon/Carbon Composites with the Fiber/Matrix Interface Modified by Silicon Carbide Nanofibers

机译：碳化硅纳米纤维修饰的纤维/基体界面的碳/碳复合材料的导热系数

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Silicon carbide nanofibers grew on the surface of carbon fibers of a unidirectional carbon preform by CCVD and then chemical vapor infiltration was used to densify the preform to get the SiCNF-C/C composite. The effects of silicon carbide nanofibers on the microstructure of the pyrolytic carbon and the thermal conductivity of the SiCNF-C/C composite were investigated. Results show that silicon carbide nanofibers on the surface of carbon fibers induce the deposition of high texture pyrolytic carbon around them. The interface bonding between carbon fibers and pyrolytic carbon is well adjusted. So the efficiency of heat transfer in the interface of the composite is well enhanced. The thermal conductivity of the SiCNF-C/C composite is greater than that of the C/C composite, especially the thermal conductivity perpendicular to the fiber axis.
机译：碳化硅纳米纤维通过CCVD在单向碳预成型坯的碳纤维表面上生长，然后使用化学气相渗透法对预成型坯进行致密化，从而获得SiCNF-C / C复合材料。研究了碳化硅纳米纤维对热解碳微观结构和SiCNF-C / C复合材料导热系数的影响。结果表明，碳纤维表面的碳化硅纳米纤维诱导了高质构热解碳在其周围的沉积。碳纤维和热解碳之间的界面结合得到了很好的调节。因此，可以很好地提高复合材料界面的传热效率。 SiCNF-C / C复合材料的导热系数大于C / C复合材料的导热系数，尤其是垂直于纤维轴的导热系数。

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