BAO, X., NANGREJO, M. and EDIRISINGHE, M., 2000. Preparation of silicon carbide foams using polymeric precursor solutions. Journal of Materials Science, 35 (17), pp.4365-4372.
A simple method was developed to produce silicon carbide foams using polysilane
polymeric precursors. Polyurethane foams were immersed in polysilane precursor
solutions to prepare pre-foams. Subsequently, these were heated in nitrogen at different
temperatures in the range of 900±C to 1300±C. The silicon carbide foams produced in this
manner showed well-defined open-cell structures and the struts in the foams were free of
voids. The shrinkage which accompanies pyrolysis of the pre-foams was reduced by
increasing the concentration of the polymeric precursor in the solutions.
The authors wish to thank the Government of Pakistan
for partial support of this work via a PhD scholarship to