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Synthesis of silicon carbide foams from polymeric precursors and their blends

journal contribution
posted on 14.09.2016 by Xujin Bao, Muhammad R. Nangrejo, Mohan J. Edirisinghe
Several polysilanes with different overall functionalities have been synthesized and pyrolyzed to produce porous silicon carbide. The polysilanes and their ceramic products have been characterized using gel permeation chromatography, Fourier transform-infrared spectroscopy, thermogravimetry, X-ray diffractometry and microscopy. Some products were foams while others were micro-porous ceramics. The effect of the final pyrolytic yield on the Type of ceramic produced, its pore structure and shape retention are discussed. Two polysilanes were blended in various ratios to control the pyrolysis process more precisely. This allowed the Type, shape and pore-structure of the silicon carbide produced to be controlled more efficiently. There exists a relationship between the composition and structure of the precursors and their final pyrolytic yield and this determines the Type, shape retainability and pore structure of the ceramics produced. In this work, precursors or their blends which gave a final pyrolytic yield of 50–60 wt % produced the best silicon carbide foams.

Funding

The authors wish to thank the Government of Pakistan for partial support of this work via a PhD scholarship to Mr. Nangrejo.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Journal of Materials Science

Volume

34

Pages

2495 - 2505

Citation

BAO, X., NANGREJO, M. and EDIRISINGHE, M., 1999. Synthesis of silicon carbide foams from polymeric precursors and their blends. Journal of Materials Science, 34 (11), pp.2495-2505.

Publisher

© Kluwer Academic

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1999

Notes

Closed access.

ISSN

0022-2461

eISSN

1573-4803

Language

en

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