Chapter 27. Porous Rare-Earth Aluminate Fiber Coatings for Oxide-Oxide Composites

  1. Todd Jessen,
  2. Ersan Ustundag
  1. Michael K. Cinibulk,
  2. Triplicane A. Parthasarathy,
  3. Kristin A. Keller,
  4. Tai-Ii Mah

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch27

Book Title

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

Additional Information

How to Cite

Cinibulk, M. K., Parthasarathy, T. A., Keller, K. A. and Mah, T.-I. (2008) Porous Rare-Earth Aluminate Fiber Coatings for Oxide-Oxide Composites, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch27

Author Information

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

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • porous oxide fiber;
  • polymeric solution derived;
  • mixing oxide sols;
  • microstructure;
  • polycrystalline alumina

Summary

A porous-oxide fiber coating concept was investigated for oxide matrices reinforced with Nextel™ 610 fibers. Polymeric-solution-derived lanthanum hexaluminate (LaMnAl11O19) with a fugitive carbon phase and yttrium-aluminum garnet (YAG, Y3Al5O12) with a fugitive carbon phase were chosen as porous fiber coatings. Matrices of Blackglas™ or alumina were used to form minicomposites. Ultimate tensile strengths were used to evaluate the effect of the porous coatings on tow and minicomposite strengths. The porous lanthanum hexaluminate coating resulted in tow strength degradation of ∼40%. The porous YAG coatings did not reduce the strength of the tow when heated in argon and degraded the tow strength by only ∼15% after heating in air to 1200°C for 2 h. Both rare-earth aluminate porous coatings greatly increased the strengths of minicomposites over control minicomposites with no fiber coating.

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