Chapter 4. Synthesis of Calcium Hexaluminate and Lanthanum Hexaluminate Fiber Coatings

  1. Don Bray
  1. Michael K. Cinibulk

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294482.ch4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

How to Cite

Cinibulk, M. K. (1988) Synthesis of Calcium Hexaluminate and Lanthanum Hexaluminate Fiber Coatings, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294482.ch4

Author Information

  1. Materials and Manufacturing Directorate Air Force Research Laboratory Wright-Patterson Air Force Base, OH 45433-7817

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470375587

Online ISBN: 9780470294482

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Keywords:

  • hexaluminate;
  • temperatures;
  • hibonite;
  • magnetoplumbite;
  • aluminum

Summary

A cleavable hexaluminate fiber-matrix interphase requires that phase-pure, textured coatings be obtained at less than 1200-1300°C to minimize polycrystalline oxide-fiber degradation. The synthesis of phase-pure powders and texturing of thin films at reduced temperatures using polymeric precursors and metal-oxide dopants are discussed. Calcium hexaluminate coatings were not obtained on polycrystalline fibers due to CaO segregation; coatings of iron-doped lanthanum hexaluminate were produced at 1100°C, but basal-texture was not obtained.