Chapter 17. Economical SiC Fiber Tow Via CVD

  1. John B. Wachtman Jr.
  1. W. J. Lackey,
  2. J. A. Hanigofsky and
  3. B. N. Beckloff

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314500.ch17

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

How to Cite

Lackey, W. J., Hanigofsky, J. A. and Beckloff, B. N. (1994) Economical SiC Fiber Tow Via CVD, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314500.ch17

Author Information

  1. Georgia Institute of Technology, Atlanta, GA 30332

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375327

Online ISBN: 9780470314500

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Keywords:

  • stability;
  • oxidation;
  • creep;
  • dilution ratio;
  • methyltrichlorosilane

Summary

Low cost SiC fiber tow is needed in order to broaden the use of ceramic and metal matrix composites for both industrial and defense applications. As evidenced by SiC monofilaments prepared by CVD, the CVD process is capable of preparing stoichiometric, crystalline SiC that is both stronger and has superior thermal stability than polymeric-derived SiC fiber. A fiber tow, rather than a large monofilament, is needed for reinforcing ceramics. Preparation of SiC fiber tow via CVD onto a commercially available carbon fiber tow has been demonstrated. An economic analysis based on the coating of T-300 (3K) carbon substrate with 5 μmn of SiC (final fiber diameter of 17μm) indicates that the desired SiC fiber tow could be produced for a cost of ∼ $50/lb compared to $300/lb for Nicalon and $5,000/lb for SiC monofilament.