Chapter 6. Thermomechanical Stability of Mullite/Alumina Systems

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. Marie-Hélène Berger

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch6

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

How to Cite

Berger, M.-H. (2008) Thermomechanical Stability of Mullite/Alumina Systems, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch6

Author Information

  1. Centre des Matériaux - Ecole des Mines de Paris BP 87 - 91003 Evry Cedex - France

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375785

Online ISBN: 9780470294741

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Keywords:

  • microstructure;
  • alkali contamination;
  • equilibrium diagram;
  • crystal structure;
  • intergranular cracks

Summary

Non stoichiometry in mullite induces super structure formation and low atomic mobilities. Some variations in composition, stability, and microstructure of mullite are reviewed as a function of the synthesis processes and the related ability for ion to diffuse and a-alumina to nucleate. An example of a glass free mullite/alumina in situ composite formed from a high A12O3 to SiO2 ratio composition is described. The high strengths and creep resistances obtained are counterbalanced by a great sensitivity to alkali contamination.