Chemical vapor deposition of C on SiO2 and subsequent carbothermal reduction for the synthesis of nanocrystalline SiC particles/whiskers

The effect of pitch-based carbon fiber microstructure and composition on the formation and growth of SiC whiskers via reaction of such fibers with silicon sources

“…Due to the great interest in silicon carbide whiskers for materials technology, numerous methods have been developed to prepare SiC whiskers, including pyrolysis of polyureasilazane precursor [11], carbon nanotube-confined reaction [12], chemical vapor deposition [13], sol-gel synthesis [14,15], carbothermal reduction [16,17], and direct chemical reactions [18]. However, existing syntheses for the large-scale production of SiC whiskers generally yield low purity products with various structural defects [8,19] or require costly precursors [11], rigorous handing of volatile reagents [13] and high temperature [18].…”

Synthesis of SiC whiskers by VLS and VS process

“…Carbothermal reduction of silica precursors is the most common VS process for the SiC production. Silica sources included various materials such as rice hulls [20][21][22][23], silica [24], silica gel [25], sea sand [26] and geothermal water [27]. The reductants reported in the literature were charcoal [28], carbon black [14] and CH 4 [11].…”

Preparation of SiC nanowires-filled cellular SiCO ceramics from polymeric precursor

“…Therefore, SiC nanowires have a great potential to be used as reinforcing element in ceramic, metal and polymer-matrix composites. There are several routes to synthesize SiC nanowires, such as chemical vapor deposition, through reaction of silica and carbon solid mixtures, by reduction of methyl trichlorosilane, by reaction of Si 3 N 4 with carbon, and by thermal decomposition of rice husk [27][28][29][30]. It can be concluded that the porous bodies can provide enough growth space for nanowires [31,32].…”