Chapter 45. C-Coupon Studies of SiC/SiC Composites Part II: Microstructural Characterization

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. Frances I. Hurwitz1,
  2. Anthony M. Calomino1,
  3. Gregory N. Morscher2 and
  4. Terry R. Mccue3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch45

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

How to Cite

Hurwitz, F. I., Calomino, A. M., Morscher, G. N. and Mccue, T. R. (2002) C-Coupon Studies of SiC/SiC Composites Part II: Microstructural Characterization, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch45

Author Information

  1. 1

    NASA Glenn Research Center Cleveland OH, 44135

  2. 2

    Ohio Aerospace Institute NASA Glenn Research Center Cleveland OH, 44135

  3. 3

    QSS Group Inc. Cleveland, OH 44135

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375785

Online ISBN: 9780470294741

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Keywords:

  • tensile;
  • characterized;
  • electron microscopy;
  • interlaminar;
  • characterization

Summary

A “C-coupon” was used to measure the interlaminar tensile behavior of five different composite materials: Sylramic/MI (melt infiltration SiC matrix), ZMI/MI, Sylramic/S300, and ZMI and Hi-Nicalon with an S200 matirx at room temperature, 816°Cand 1204°C. Fracture behavior was characterized by field emission scanning electron microscopy, and observed cracking compared with events measured by modal acoustic emission. Both radial and matrix hoop cracking along the inner radius arising from hoop stresses were observed for all material types. In those composites in which the radial cracks were sufficiently wide to view the composite interior, fracture was observed to occur at the fiber BN or BN matrix interface. Close agreement was found between the maximum radial stress, determined from the C-coupon, and the interlaminar tensile strength determined from the traditional “button test”.