Advertisement

Bulletin of Materials Science

, Volume 23, Issue 1, pp 1–4 | Cite as

Sol-gel processing of carbidic glasses

  • L. M. Manocha
  • E. Yasuda
  • Y. Tanabe
  • S. Manocha
  • D. Vashistha
Glasses

Abstract

Carbon incorporation into the silicate network results in the formation of rigid carbidic glasses with improved physical, mechanical and thermal properties. This generated great interest in the development of these heteroatom structured materials through different processing routes. In the present studies, sol-gel processing has been used to prepare silicon based glasses, especially oxycarbides through organic-inorganic hybrid gels by hydrolysis-condensation reactions in silicon alkoxides, 1,4-butanediol and furfuryl alcohol with an aim to introduce Si-C linkages in the precursors at sol level. The incorporation of these linkages has been studied using IR and NMR spectroscopy. These bonds, so introduced, are maintained throughout the processing, especially during pyrolysis to high temperatures. In FFA-TEOS system, copolymerization with optimized mol ratio of the two results in resinous mass. This precursor on pyrolysis to 1000°C results in Si-O-C type amorphous solid black mass. XRD studies on the materials heated to 1400°C exhibit presence of crystalline Si-C and cristobalites in amorphous Si-O-C mass. In organic-inorganic gel system, the pyrolysed mass exhibits phase stability up to much higher temperatures. The carbidic materials so produced have been found to exhibit good resistance against oxidation at 1000°C.

Keywords

Sol-gel silicon oxycarbide organically modified inorganic gels hydrolysis pyrolysis silicon carbide cristoballites 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Amara Ch. Ben, Gharbi N and Zarrouk H 1994J. Sol-gel Sci. & Technol. 2 193CrossRefGoogle Scholar
  2. Babonneau Fet al 1994Chem. Mater. 6 51CrossRefGoogle Scholar
  3. Leohman R E 1983J. Non-Cryst. Solids 56 123CrossRefGoogle Scholar
  4. Mackenzie J D 1994J. Sol-gel Sci. & Technol. 2 81CrossRefGoogle Scholar
  5. Manocha S M, Vashistha D Y and Manocha L M 1997J. Mater. Sci. Lett. 16 705CrossRefGoogle Scholar
  6. Renlund G M, Prochazke S and Doremus R H 1991J. Mater. Res. 6 2716Google Scholar
  7. Soraru G D 1994J. Sol-gel Sci. & Technol. 2 843CrossRefGoogle Scholar
  8. Soraru G Det al 1995J. Am. Ceram. Soc. 78 379CrossRefGoogle Scholar
  9. Yoshino H, Kamiya K and Nasu H 1990J. Non-Cryst. Solids 126 68CrossRefGoogle Scholar
  10. Zhang H and Pantano C G 1990J. Am. Ceram. Soc. 73 958CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2000

Authors and Affiliations

  • L. M. Manocha
    • 1
  • E. Yasuda
    • 1
    • 2
  • Y. Tanabe
    • 1
    • 2
  • S. Manocha
    • 1
  • D. Vashistha
    • 1
  1. 1.Department of Materials ScienceSardar Patel UniversityVallabh VidyanagarIndia
  2. 2.Materials and Structures LaboratoryTokyo Institute of TechnologyYokohamaJapan

Personalised recommendations