Materials Chemistry and Physics, Vol.219, 258-262, 2018
The preparation of SiC nanowires reinforced porous carbon nanocomposites by a simple method
Using white granulated sugar (C12H22O11 ) and silica (SiO2 ) nanopowder as the precursor, with the assistance of ammonium chloride (NH4Cl) foaming agent, we have created SiC/C nanocomposites with various mesoporous by changing the proportion of precursors via a carbothermal reduction technique. The crystalline structure, surface morphology, microstructure and component ratio of the SiC/C nanocomposites were thoroughly characterized by using XRD, Raman, Micro-CT, SEM and TEM. Defined by the foaming agent, the carbon matrix consists of highly graphitized porous structure, whilst the reinforcing SiC phase is made of 3C (beta-type) SiC nanowires with a preferred growth direction of  and twin structure. At higher carbon ratio, the diameter of the SiC nanowires tend to increase to form larger whiskers. These nanowires possess the sizes of 20-60 nm in diameter and 20-30 mu m in length.