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Preparation of silicon carbide foams using polymeric precursor solutions

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Abstract

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 with increasing the concentration of the polymeric precursor solutions.

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Authors and Affiliations

  1. Department of Materials, Queen mary & Westfield College, University of London, Mile End Road, London, E1 4NS, UK

    X. Bao & M. R. Nangrejo

  2. Department of Materials, Queen mary & Westfield College, University of London, Mile End Road, London, E1 4NS, UK

    M. J. Edirisinghe

Authors
  1. X. Bao
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  2. M. R. Nangrejo
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  3. M. J. Edirisinghe
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Bao, X., Nangrejo, M.R. & Edirisinghe, M.J. Preparation of silicon carbide foams using polymeric precursor solutions. Journal of Materials Science 35, 4365–4372 (2000). https://doi.org/10.1023/A:1004805023228

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