Chapter 22. The Role of Aluminum Migration at the Interface in SiC Reinforced Glass-Ceramic Matrix Composites

  1. John B. Wachtman Jr.
  1. Gang Qi and
  2. Carlo G. Pantano

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314784.ch22

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5

How to Cite

Qi, G. and Pantano, C. G. (1995) The Role of Aluminum Migration at the Interface in SiC Reinforced Glass-Ceramic Matrix Composites, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 16, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314784.ch22

Author Information

  1. Department of Materials Science and Engineering Pennsylvania State University University Park, PA 16802

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375389

Online ISBN: 9780470314784

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Keywords:

  • ingredients;
  • insulating;
  • polymers;
  • fabrication;
  • consumption

Summary

Aluminum is commonly observed in the surface region of SiC fibers in hot-pressed glass ceramic matrix composites. It is believed to be the result of interface reactions with Al-containing matrices. However, the influence of aluminum migration on the evolution of interphases, especially carbon enrichment, still remains unknown. In this study, reaction couples between an alumino-silicate glass and silicon-oxycarbide were used to study mass transport and interphase formation. The silicon oxycarbide, synthesized using a sol-gel process, was used to simulate the reactive phase of polymer-derived SiC fibers; in some case, it was doped with Al. A strong influence of aluminum on the carbon enrichment was observed. Using a thermodynamic model, the mechanism of the interphase evolution will be discussed.