Chapter 46. Preceramic Polymers for Use as Fiber Coatings

  1. John B. Wachtman Jr
  1. P. J. Heimann1,
  2. F. I. Hurwitz2,
  3. D. Wheeler2,
  4. J. Eldridge2,
  5. R. Baranwal3 and
  6. R. Dickerson4

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch46

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

How to Cite

Heimann, P. J., Hurwitz, F. I., Wheeler, D., Eldridge, J., Baranwal, R. and Dickerson, R. (1995) Preceramic Polymers for Use as Fiber Coatings, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314715.ch46

Author Information

  1. 1

    Cleveland State University, Cleveland, OH

  2. 2

    NASA Lewis Research Center, Cleveland, OH

  3. 3

    University of Michigan, Ann Arbor, MI

  4. 4

    Case Western Reserve University, Cleveland, OH.

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375372

Online ISBN: 9780470314715

SEARCH

Keywords:

  • polymeric;
  • pyrolyzed;
  • polyborosilazanes;
  • conventional;
  • rheology

Summary

Polymeric precursors to Si-C-O, Si-B-N and Si-C were evaluated for use as ceramic interfaces in ceramic matrix composites. Use of the preceramic polymers allows for easy dip coating of fibers from dilute solutions of a polymer, which are then pyrolyzed to obtain the ceramic. SCS-0 fibers (Textron Specialty Materials, Lowell, MA.) were coated with polymers from three systems: polysilsesquioxanes, polyborosilazanes and polycarbosilanes. The polysilsesquioxane systems were shown to produce either silicon oxycarbide or silicon oxynitride, depending on the pyrolysis conditions, and demonstrated some promise in an RBSN matrix model system. Polyborosilazanes were shown, in studies of bulk polymers, to give rise to oxidation resistant Si-B-N ceramics which remain amorphous to temperatures of 1600°C, and should therefore provide a low modulus interface. Polycarbosilanes produce amorphous carbon-rich Si-C materials which have demonstrated oxidation resistance.