Chapter 27. Room Temperature Tensile Behavior and Damage Accumulation of Hi-Nicalon Reinforced Sic Matrix Composites

  1. Don Bray
  1. G. N. Morscher1 and
  2. J. Z. Gyekenyesi2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294482.ch27

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

Morscher, G. N. and Gyekenyesi, J. Z. (1988) Room Temperature Tensile Behavior and Damage Accumulation of Hi-Nicalon Reinforced Sic Matrix Composites, 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.ch27

Author Information

  1. 1

    Case Western Reserve University, Cleveland, OH

  2. 2

    Cleveland State University, Cleveland, OH

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:

  • monotonic;
  • hysteresis;
  • microcracks;
  • hydraulically;
  • composites

Summary

Composites consisting of woven Hi-Nicalon fibers, BN interphases, and different SiC matrices were studied in tension at room temperature. Composites with SiC matrices processed by CVI and melt infiltration were compared. Monotonic and load/unload/reload tensile hysteresis experiments were performed. A modal acoustic emission (AE) analyzer was used to monitor damage accumulation during the tensile test. Post test polishing of the tensile gage sections was performed to determine the extent of cracking. The occurrence and location of cracking could easily be determined using modal AE. The loss of modulus could also effectively be determined from the change in the velocity of sound across the sample. Finally, the stresses where cracks appear to intersect the load-bearing fibers correspond with high temperature low cycle fatigue run out stresses for these materials.