Chapter 76. Effect of Small Effusion Holes on Creep Rupture Behavior of Oxide\Oxide NextelTm720\As Composite

  1. Mrityunjay Singh and
  2. Todd Jessen
  1. Dennis J. Buchanan2,
  2. Victoria A. Kramb2,
  3. Reji John1 and
  4. Larry P. Zawada1

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294680.ch76

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

How to Cite

Buchanan, D. J., Kramb, V. A., John, R. and Zawada, L. P. (2001) Effect of Small Effusion Holes on Creep Rupture Behavior of Oxide\Oxide NextelTm720\As Composite, in 25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3 (eds M. Singh and T. Jessen), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294680.ch76

Author Information

  1. 1

    Materials and Manufacturing Directorate, Air Force Research Laboratory (AFRL\MLLN), Wright-Patterson Air Force Base, OH 45433–7817

  2. 2

    University of Dayton Research Institute, Dayton, OH 45419

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375730

Online ISBN: 9780470294680

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Keywords:

  • composites;
  • diameter;
  • vicinity;
  • oxidation;
  • deformation

Summary

Oxide\Oxide Ceramic Matrix Composites (CMC) are currently being evaluated for high-temperature aerospace applications where their beneficial resistance to oxidation is critical for retaining mechanical properties under long-life conditions. Many of these component applications require holes for cooling and attachment points. An investigation on the effects of 0.5 mm diameter effusion holes on the creep rupture behavior was initiated. The Oxide\Oxide CMC studied during this investigation was NextelTM720\AS. The matrix was Alumina-Silica reinforced with an eight-hamess satin weave (8HSW) mat of NextelTM720 fibers. Multiple effusion hole patterns were evaluated at elevated temperature (1100°C) under sustained-load (creep) conditions. Extensometry and sectioned samples from interrupted tests were used to characterize the damage zone in the vicinity of the holes. The presence of 0.5 mm diameter effusion holes in specimens subjected to sustained load conditions showed no detrimental effects to the creep behavior or to the fiber and matrix in the vicinity of the holes.