Chapter 64. Evaluation of a Candidate Material for a Coal-Fired Magnetohydrodynamic (MHD) High Temperature Recuperative Air Heater

  1. John B. Wachtman Jr.
  1. J. Winkler,
  2. N. B. Dahotre and
  3. W. Boss

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch64

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

Winkler, J., Dahotre, N. B. and Boss, W. (1993) Evaluation of a Candidate Material for a Coal-Fired Magnetohydrodynamic (MHD) High Temperature Recuperative Air Heater, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch64

Author Information

  1. The University of Tennessee Space Institute, Tullahoma, TN

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • ceramic composite tube;
  • metallurgical microscopy;
  • electron microscopy;
  • Young's modulus;
  • magnetohydrodynamic

Summary

An evaluation of a ceramic composite tube for possible use in high temperature air heaters was conducted. A silicon-carbide/alumina composite ceramic tube which had been tested for 107 hours in a coal fired flow facility at a temperature of approximately 2100°F was evaluated to determine any changes in properties from the as-received material. The evaluation included mechanical testing and surface analysis. The mechanical testing was comprised of compression and tension testing of circular rings of unexposed and exposed material. The surface analysis included stereo microscopy, metallurgical microscopy, and scanning electron microscopy as well as microprobe analysis employing EDS and WDS analysis and x-ray mapping. From this experimental study parameters such as Young's modulus, porosity, and compressive strength were determined to demonstrate any changes in the material due to testing. The results will be discussed in more detail during presentation.