Chapter 51. Stress/Life Behavior of a C/SiC Composite in a Low Partial Pressure of Oxygen Environment Part I: Static Strength and Stress Rupture Database

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. Michael J. Verrilli1,
  2. Anthony Calomino1 and
  3. David J. Thomas2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch51

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

Verrilli, M. J., Calomino, A. and Thomas, D. J. (2002) Stress/Life Behavior of a C/SiC Composite in a Low Partial Pressure of Oxygen Environment Part I: Static Strength and Stress Rupture Database, 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.ch51

Author Information

  1. 1

    NASA Glenn Research Center 21000 Brookpark Road Brook Park, Ohio 44135

  2. 2

    Ohio Aerospace Institute 22800 Cedar Point Road Brook Park, Ohio 44142

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:

  • variability;
  • tensile;
  • structural propulsion;
  • calibration;
  • degradation

Summary

Tensile strengths and stress-rupture lives were obtained for carbon fiber-reinforced silicon carbide (C/SiC) composite specimens. The testing was performed at 1200°C in an environment of 1000-ppm oxygen, with argon as the remaining gas. Twenty tensile tests were conducted. The stress-rupture database includes over twenty test results, with test stresses in the range of 276 to 100 MPa resulting in lives in the range of 4 to 160 hours. All specimens were machined from a single material lot. Plate-to-plate variability of tensile strength and stress-rupture lives was observed and is discussed. Also, the creep strain data as a function of stress and plate ID is presented.

During the stress-rupture testing of C/SiC specimens, the partial pressure of O2 flowing out of the chamber was monitored and found to vary as a function of test time for any given test. The effluent partial pressure of O2 varied with test stress and these results are presented as well.