Chapter 31. Investigation of Mechanical Properties of Chemically Vapor Infiltrated (CVI) Ceramic Matrix Composites

  1. John B. Wachtman Jr.
  1. K. Ranji Vaidyanathan1,
  2. Jagannathan Sankar1,
  3. Ajit D. Kelkar1 and
  4. Jagdish Narayan2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314500.ch31

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

How to Cite

Vaidyanathan, K. R., Sankar, J., Kelkar, A. D. and Narayan, J. (1994) Investigation of Mechanical Properties of Chemically Vapor Infiltrated (CVI) Ceramic Matrix Composites, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314500.ch31

Author Information

  1. 1

    Department of Mechanical Engineering, North Carolina A&T State University, Greensboro, NC 27411

  2. 2

    Department of Materials Science and Engineering, North Carolina State University Raleigh, NC 27695

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375327

Online ISBN: 9780470314500

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Keywords:

  • lay-ups;
  • tensile;
  • fractography;
  • fabrication;
  • quasi-isotropic

Summary

The mechanical properties of two different lay-ups of Nicalon™ fiber-reinforced SiC matrix composites fabricated employing the forced-flow, thermal gradient chemical vapor infiltration (FCVI) process were compared at room temperature and elevated temperature in pure tension. A carbon interface layer was used for both types of composites. Because of the nature of the FCVI process, only short-length specimens (7-8 cms) could be fabricated. Room and elevated temperature tensile strengths were measured and compared for the two types of composites. Scanning electron microscopy and transmission electron microscopy were used to analyze the fracture behavior in this composite system. Fractography as well as possible factors responsible for the differences in tensile strength for the two types of composites are discussed in this paper.