Chapter 71. Crack Growth Behavior and Tem Analysis of Interphase Oxidation in Boron-Enhanced Sic\Sic Composites

  1. Mrityunjay Singh and
  2. Todd Jessen
  1. Lucille A. Giannuzzi1 and
  2. Charles A. Lewinsohn2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294680.ch71

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

Giannuzzi, L. A. and Lewinsohn, C. A. (2001) Crack Growth Behavior and Tem Analysis of Interphase Oxidation in Boron-Enhanced Sic\Sic Composites, 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.ch71

Author Information

  1. 1

    Mech., Materials & Aero. Eng. University of Central Florida Orlando, FL 32816–2450

  2. 2

    Pacific Northwest National Laboratory Richland, WA 99352

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:

  • carbide;
  • amorphous;
  • mechanisms;
  • oxygen;
  • microscopy

Summary

A comparison of the crack growth behavior of a silicon carbide-based fiber reinforced, silicon carbide matrix composite (SiCl\SiCm) with or without boron, is presented. The lifetime of boron-enhanced composites was greater than that of the non-boron-containing composite. Transmission electron microscopy (TEM) of the boron-enhanced fracture surfaces indicates sealing of matrix cracks by an amorphous oxide phase in the sample tested at the lower oxygen level and nearly complete interphase removal in the sample tested at the higher oxygen level. The results indicate the dependence of the acting failure mechanisms on oxygen concentration is distinctly different for the two composites.