Chapter 32. Effect of Multiple Coating Interfacial Structures on Bending Property of Fcvi SiC/SiC Composites

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Wen Yang1,
  2. Hiroshi Araki2,
  3. J. Y. Park3,
  4. Tetsuji Noda2,
  5. Akira Kohyama1 and
  6. Jinnan Yu4

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch32

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

Yang, W., Araki, H., Park, J. Y., Noda, T., Kohyama, A. and Yu, J. (2000) Effect of Multiple Coating Interfacial Structures on Bending Property of Fcvi SiC/SiC Composites, 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.ch32

Author Information

  1. 1

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

  2. 2

    National Research Institute for Metals, CREST, 1–2-1 Sengen, Tsukuba, Ibaraki 305–0047, Japan

  3. 3

    Korea Atomic Energy Research Institute, Taejon, 305–353, Korea

  4. 4

    China Institute of Atomic Energy, 102413, Beijing, China

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:

  • hi nicalon plain;
  • flow chemical vapor infiltration;
  • thermo mechanical advantages;
  • trichloromethylsilane;
  • chemical vapor deposition

Summary

Hi-Nicalon plain woven Sic fabric reinforced SiC/SiC composites with a variety of carbon or SiC/C multiple fiber/matrix interlayers were fabricated by Forced flow Chemical Vapor Infiltration (FCVI) process. The interlayers were deposited by Isothermal CVI (ICVI) process. The fracture behaviors of the composites were investigated by three-point bending test at room temperature. The average strength for composite with 100nm carbon interlayer was 546MPa. It increased to 575MPa for the 220nm carbon interlayered composite. which yielded the highest individual specimen strength of 673MPa among all the composites presented in this paper. When the carbon layer increased to 760nm, the composite strength showed a small decrease but was still about 500MPa. For composite with 250nmSiC+400nmC interlayers, the average strength was 560MPa, coupled with a deflection at ultimate strength over 0.4mm. When both the thickness of Sic and carbon layers was reduced to 100nm, the strength decreased to 482MPa. For composite with interlayers of (100nmSiC+100nmC) × 2, the strength was around 340MPa, similar to no interlayered composite but with very long fiber pull-outs showing on the SEM fracture surface.