Chapter 35. Optimization of New Precursor Systems for Continuous Fluid Carbon Fiber Coating

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Nataša Doslik,
  2. Ralph Fischer and
  3. Rainer Gadow

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch35

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

How to Cite

Doslik, N., Fischer, R. and Gadow, R. (2008) Optimization of New Precursor Systems for Continuous Fluid Carbon Fiber Coating, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch35

Author Information

  1. University of Stuttgart Institute for Manufacturing Technologies of Ceramic Components and Composites Allmandring 5b D — 70569 Stuttgart GERMANY

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • carbon fibers;
  • polyorganoborosilazanes;
  • metal matrix composites;
  • liquid coating;
  • rotative oscillation rheometry

Summary

Carbon fibers are found today in a wide range of applications as reinforcing component in ceramic and metal matrix composites. In spite of the exellent mechanical properties at high temperatures a drawback is their sensitivity against oxidation and chemically active environment. Various coating technologies have been applied to build protective and adhesion controlling surface layers. The best prospects for new high temperature stable protective coating materials are shown by SiBCN and SiCN compounds. The realization is carried out by a liquid polymer coating and impregnation with polyorganoborosilazanes in a continuous fiber coating process. The precursors are optimized in flow behavior and characterized by detailed rheological investigations. The wetting behavior on the carbon fiber surface is depending on the visco-elastic properties of the precursors. Therefore one can influence the wetting properties by adjustment of the ratio between loss modulus and storage modulus. With these data the result is an optimized pass through velocity, that is inverse proportional to the thickness of the coating film.