Chapter 28. The Stress Dependence Damage Mechanism During Tensile Creep and Fatigue in a SiC/SiC Composite at 1400°C

  1. Don Bray
  1. Jian-Wu Cao,
  2. Mineo Mizuno and
  3. Yasuo Nagano

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294482.ch28

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

How to Cite

Cao, J.-W., Mizuno, M. and Nagano, Y. (1988) The Stress Dependence Damage Mechanism During Tensile Creep and Fatigue in a SiC/SiC Composite at 1400°C, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294482.ch28

Author Information

  1. Japan Fine Ceramics Center, Atsuta-ku, Nagoya 456, Japan; Yutaka Kagawa, Institute of Industrial Sciences, The University of Tokyo, Tokyo 106, Japan; Hiroshi Kaya, Petroleum Energy Center, Minato-ku, Tokyo 106, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470375587

Online ISBN: 9780470294482

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Keywords:

  • silicon carbide, composite, tensile creep, strain rate, fatigue

Summary

Tensile, creep and fatigue behavior of woven fabric SiC (Nicalon™) fiber-reinforced enhanced SiC matrix composite at 1400°C in air has been studied. The tensile stress-strain curve showed transition from linear to nonlinear behavior at a critical stress of 70 MPa. All specimens in creep and cyclic fatigue tests failed when loaded at stresses more than 70 MPa, but no specimen failed after 200 hrs at stresses less than 70 MPa. Both the creep and fatigue behavior was interpreted by simple equation: ϵ = Aδn. Both creep and fatigue lives depended on the critical stress. This indicates that microfracture in the composite plays an important role on the creep and fatigue lives.