Chapter 15. Creep Resistant Biomorphic Silicon-Carbide Based Ceramics

  1. Mrityunjay Singh and
  2. Todd Jessen
  1. J. Martinez-Fernández1,
  2. F. M. Varela-Feria1,
  3. S. Löapez-Pombero1,
  4. A. R. De Arellano-López1 and
  5. M. Singh2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294680.ch15

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

How to Cite

Martinez-Fernández, J., Varela-Feria, F. M., Löapez-Pombero, S., De Arellano-López, A. R. and Singh, M. (2001) Creep Resistant Biomorphic Silicon-Carbide Based Ceramics, in 25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3 (eds M. Singh and T. Jessen), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294680.ch15

Author Information

  1. 1

    Dpto. de Fisica de la Materia Condensada Universidad de Sevilla, Spain

  2. 2

    QSS Group, Inc., NASA Glenn Research Center Cleveland, OH, USA

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375730

Online ISBN: 9780470294680

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Keywords:

  • ceramics;
  • anisotropy;
  • pyrolysis;
  • microstructure;
  • biomorphic

Summary

The high temperature compressive strength of biomorphic silicon carbide-based ceramics was studied in air from 1150°C to 1350°C. The compressive creep behavior of these ceramics was also studied in argon in the same temperature range. The microstructure before and after high temperature testing was studied by scanning electron microscopy. These ceramics have regions of silicon and silicon carbide that resemble the fibrous microstructure of the wood selected. This results in a high compressive strength (up to 700 MPa at 1150°C) and high creep resistance (creep rates under 10-9 s-1 at 290 MPa and 1350°C). Under constant load conditions, these materials show a continuous decrease in the creep rate. The strength anisotropy and saturation of deformation mechanisms are discussed.