Chapter 22. Polymer-Derived Silicon Carbide Fibers with low Oxygen Content

  1. John B. Wachtman Jr.
  1. William Toreki,
  2. Guang J. Choi,
  3. Christopher D. Batich and
  4. Michael D. Sacks

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313954.ch22

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

How to Cite

Toreki, W., Choi, G. J., Batich, C. D. and Sacks, M. D. (1994) Polymer-Derived Silicon Carbide Fibers with low Oxygen Content, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313954.ch22

Author Information

  1. Mohamed Saleem, Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375174

Online ISBN: 9780470313954

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Keywords:

  • polymer;
  • atmosphere;
  • polycarbosilane;
  • nitrogen;
  • combustion

Summary

Continuous silicon carbide fibers with low oxygen content (2 wt%) were prepared in a range of diameters (∼10–50 μm) by dry spinning of polycarbosilane solutions and subsequent pyrolysis of the polymer fibers. Average tensile strengths approaching 3 GPa were obtained for some batches with fiber diameters in the range ∼10–15 μm. These fibers showed excellent thermomechamical stability compared to commercially-available NicalonTM fibers, i.e., significantly lower weight loss and higher tensile strength were observed after heat treatment in argon at elevated temperatures (1200–1700°C). Fibers tested at 1400°C in air also showed higher tensile strengths compared to Nicalon.