Synthesis and Characterization of Laminated Si/SiC Composites

Naga, S. M.; Kenawy, S. H.; Awaad, M.; Abd El-Wahab, H. S.; Greil, P.; Abdir, M. S.

doi:10.21608/amme.2010.38189

Synthesis and Characterization of Laminated Si/SiC Composites

Document Type : Original Article

Authors

¹ National Research Center, Ceramic Dep., Tahrir str., Dokki, Cairo, Egypt.

² Unversity of Erlangen-Nuernberg, Department of Materials Science (III), Erlangen, Germany.

³ Cairo University, Chemical Engineering Dept., Cairo, Egypt.

10.21608/amme.2010.38189

Abstract

Abstract:
Laminated Si/SiC ceramics were synthesized from porous preforms of biogenous carbon impregnated with Si slurry at a temperature of 1500oC for 2 hours. Due to the capillarity infiltration with Si, both intrinsic micro- and macrostructure in the carbon preform were retained within the final ceramics. The SEM micrographs indicate that the final material exhibits a distinguished laminar structure with successive Si/SiC layers. The produced composites show weight gain of ≈ 5% after heat treatment in air at 1300 oC for 50 h. The produced bodies could be used as high temperature gas filters as indicated from the permeability results.

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