Chapter 28. Monazite Coatings on Nextel 720™, 610™, and Tyranno-Sa Fiber Tows; Effects of Precursors on Fiber Strength

  1. Todd Jessen and
  2. Ersan Ustundag
  1. E. E. Boakye1,
  2. M. D. Petry1,
  3. R. S. Hay2 and
  4. L. M. Douglas3

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch28

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

How to Cite

Boakye, E. E., Petry, M. D., Hay, R. S. and Douglas, L. M. (2000) Monazite Coatings on Nextel 720™, 610™, and Tyranno-Sa Fiber Tows; Effects of Precursors on Fiber Strength, 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.ch28

Author Information

  1. 1

    UES Inc., and Air Force Research Laboratory, Materials Directorate Wright-Patterson AFB, Dayton OH 45433

  2. 2

    Air Force Research Laboratory, Materials Directorate Wright-Patterson AFB, Dayton OH 45433

  3. 3

    Wright State University Dayton OH 45435

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:

  • monazite precursors;
  • coated fiber;
  • ceramic composites (CMC);
  • microcracking;
  • fiber coating

Summary

Three different monazite precursors were applied to Nextel™ 610, 720 and Tyranno-SA™ fiber tows using a continuous vertical coater with immiscible liquid displacement. The coatings were cured in-line at 900°C to 1300°C in argon or in air, and then characterized for thickness and microstructure by optical microscopy, SEM and TEM. The as-coated filaments were tensile tested along with some of the 900°C coatings cured in air at 1200°C for 100 h. Coating characteristics and tensile strengths of the coated fibers from the three monazite precursors were compared. Coated fiber strengths were found to be dependent upon the quantity of gaseous species from the coating precursors and porosity. Coating precursors that made porous monazite coatings preserved fiber strength.