Mechanism of Silicon/Carbon Reaction for β-SiC Bonded SiC Materials
Based on industrial silicon and carbon black as starting materials,β-SiC bonded SiC materials were prepared. The microstructure of such material and the silicon/carbon reaction were analyzed and investigated by XRD, SEM and other tools. The results indicate that the synthesis of β-SiC at 1400°C can be achieved through gas-phase mass transfer, liquid dissolution as well as in-situ reaction. While gas-phase mass transfer is the dominant reaction during the sintering of the material, in which β-SiC exists mainly as nanowhisker. The formation of β-SiC nanowires is believed to be the mechanism of reaction sintering.
Yun-Hae Kim, Prasad Yarlagadda, Xiaodong Zhang and Zhijiu Ai
C. J. Lv et al., "Mechanism of Silicon/Carbon Reaction for β-SiC Bonded SiC Materials", Advanced Materials Research, Vols. 335-336, pp. 12-17, 2011