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Defects of polymer-derived Si−C−O fibers and their originations

  • Chu Zeng-yong
  • Feng Chun-xiang
  • Song Yong-cai
  • Li Xiao-dong
  • Xiao Jia-yu
Article

Abstract

Defects of polymer-derived Si−C−O fibers were intensively studied by the SEM and TEM techniques and their originations were also discussed on the basis of factors experiments. The defects were found mainly in the form of strumaes, pits and splits on surfaces as well as microflaw networks, porosity clusters and inclusions in the bulk. Factors experiments reveal that a nonuniform or an insufficient curing would result in larger-sized strumaes or interior microflaws. Gas evolution rates due to different firing rates have a great influence on the formation of internal microflaws or porosity clusters and some oxidation-induced pits or splits may be formed on surfaces because of a trace of oxygen or water vapor accumulated from the flowing inert atmosphere during pyrolysis.

Key words

defects Si−C−O fiber polymer-derived ceramic 

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Copyright information

© Editorial Office of Journal of Wuhan University of Technology-Materials Science Edition 2004

Authors and Affiliations

  • Chu Zeng-yong
    • 1
  • Feng Chun-xiang
    • 1
  • Song Yong-cai
    • 1
  • Li Xiao-dong
    • 1
  • Xiao Jia-yu
    • 1
  1. 1.Key Lab of New Ceramic Fibers and CompositesNational University of Defense TechnologyChangshaChina

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