Chapter 47. Mechanical Properties of Advanced SiC Fiber-Reinforced CVI-SiC Composites

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Y. Katoh1,
  2. A. Kohyama1,
  3. T. Hinoki2,
  4. W. Yang2 and
  5. W. Zhang2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294628.ch47

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

How to Cite

Katoh, Y., Kohyama, A., Hinoki, T., Yang, W. and Zhang, W. (2000) Mechanical Properties of Advanced SiC Fiber-Reinforced CVI-SiC Composites, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294628.ch47

Author Information

  1. 1

    Institute of Advanced Energy Kyoto University Gokasho, Uji, Kyoto 611-0011 Japan

  2. 2

    Graduate School of Energy Science Kyoto University Gokasho, Uji, Kyoto 611-0011 Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375686

Online ISBN: 9780470294628

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Keywords:

  • acoustic emission (AE) behavior;
  • ceramic matrix composites;
  • unloading;
  • micro-fracture mechanism;
  • matrix cracking

Summary

Mechanical properties of CVI-produced SiC/SiC composites were studied. The composites, with simple carbon interphase and C/SiC multi-layered interphase/matrix, were fabricated by isothermal forced-flow CVI method. Hi-Nicalon™ and Tyranno™-SA fibers were employed as the reinforcements. Flexural testing and electron microscopy were performed on the as-fabricated composites. The effect of interphases was studied by scanning electron microscopy. The Hi-Nicalon and Tyranno-SA composites exhibited dissimilar fracture behavior; the Tyranno-SA composite showed higher proportional limit and smaller elongation. In the multilayered interphase composites, though debonding occurred mostly at the fiber surface, matrix crack deflection at the interlayers was observed. Macroscopic fracture behavior was not significantly different between single pyrocarbon and multilayered interphase Hi-Nicalon composites.