Chapter 17. MOCVD of Beta Alumina

  1. John B. Wachtman Jr.
  1. Peter W. Brown1 and
  2. S. Sambasivan2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch17

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Brown, P. W. and Sambasivan, S. (2008) MOCVD of Beta Alumina, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch17

Author Information

  1. 1

    NRC Fellow, Wright Laboratory, MLLM, Wright-Patterson AFB, OH

  2. 2

    UES, Inc., Dayton, OH

Publication History

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

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

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Keywords:

  • oxide-oxide ceramic matrix composites;
  • crack deflection;
  • metal-organic chemical vapor deposition technique;
  • lanthanum aluminate;
  • flourine- and trimethyl- substituted

Summary

It has been proposed[1] that β-alumina/magnetoplumbite type compounds can serve as oxidation resistant interphase coatings to promote crack deflection at the fiber/matrix interface in oxide-oxide ceramic matrix composites. It is also believed that the coatings may need to be oriented favorably (basal planes parallel to fiber surface) to promote crack deflection. Among the various coating techniques currently in use, chemical vapor deposition probably offers the most promise in achieving dense, uniform and oriented coatings reproducibly. In this paper, we report some preliminary results obtained on the development of a metal-organic chemical vapor deposition (MOCVD) technique to deposit beta alumina/magnetoplumbite compounds onto fibers and flat substrates. In the beta alumina family, compounds stabilized by sodium and rubidium were selected and lanthanum aluminate was chosen as the representative for the magnetoplumbite group.