National Research Center, Ceramic Dept., Tahrir Str., Dokki, Cairo, Egypt.
Unversity of Erlangen-Nuernberg, Department of Materials Science (III), Erlangen, Germany.
J Adv Res. 2013 Jan;4(1):75-82. doi: 10.1016/j.jare.2012.01.006. Epub 2012 Feb 23.
Laminated Si/SiC ceramics were synthesized from porous preforms of biogenous carbon impregnated with Si slurry at a temperature of 1500 °C for 2 h. 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 °C for 50 h. The produced bodies could be used as high temperature gas filters as indicated from the permeability results.
采用生物质碳多孔预制体，通过硅浆料浸渍，在 1500°C 下保温 2 小时，合成了层压 Si/SiC 陶瓷。由于 Si 的毛细渗透作用，碳预制体的微观和宏观结构在最终陶瓷中得以保留。SEM 显微照片表明，最终材料具有明显的层状结构，具有连续的 Si/SiC 层。在空气中于 1300°C 下热处理 50 小时后，所制备的复合材料的重量增加约 5%。从渗透率结果来看，所制备的坯体可用作高温气体过滤器。
