Chapter 89. Fabrication of Yttrium Aluminate Fibers

  1. John B. Wachtman Jr.
  1. B. H. King,
  2. Y. Liu,
  3. R. M. Laine and
  4. J. W. Halloran

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch89

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

King, B. H., Liu, Y., Laine, R. M. and Halloran, J. W. (1993) Fabrication of Yttrium Aluminate Fibers, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch89

Author Information

  1. Dept. of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • carboxylate polymers;
  • solutions;
  • aqueous solutions;
  • densification;
  • oxidizing

Summary

Yttrium aluminum garnet (YAG) fibers have been prepared by dry spinning solutions of yttrium and aluminum carboxylate polymers (precursor route) and by dry spinning aqueous oxide sols (sol-gel route). Fibers from aqueous diphasic gels are prepared by mixing a colloidal alumina sol containing 50-nm hydrous alumina with a colloidal yttria sol containing 10-nm yttrium oxide, using polyvinylpyrrolidone or polyethylene oxide as a spinning aid. Fibers by the precursor route are made from spinnable THF solutions of yttrium isobutyrate and aluminum isobutyrate or from aqueous solutions of polymeric aluminum formate and yttrium acetate. Dense, fine grained YAG fibers can be obtained by all three routes, although the spinning, curing, and pyrolysis conditions are different for each system. YAG phase formation, densification, and microstructure development behavior are compared.