Chapter 65. Creep Rupture Behavior of ±45° Oxide/Oxide Nextel™ 720/AS Composite

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Dennis J. Buchanan2,
  2. Reji John1 and
  3. Larry P. Zawada1

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294826.ch65

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4

How to Cite

Buchanan, D. J., John, R. and Zawada, L. P. (2003) Creep Rupture Behavior of ±45° Oxide/Oxide Nextel™ 720/AS Composite, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: B: Ceramic Engineering and Science Proceedings, Volume 24, Issue 4 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294826.ch65

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 2003

ISBN Information

Print ISBN: 9780470375846

Online ISBN: 9780470294826

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Keywords:

  • ceramic matrix composites;
  • aerospace applications;
  • axis-symmetric thermal;
  • architectures;
  • reinforcing fibers

Summary

Oxide/Oxide Ceramic Matrix Composites (CMC) are currently being demonstrated in high-temperature aerospace applications where their beneficial resistance to oxidation are critical to a successful design. Many applications are engine components that are axissymmetric in shape and are subjected to axis-symmetric thermal and mechanical loadings. Traditional woven CMC materials used in these components are typically made from 0°/90° fiber architectures. In many cases the highest loads are not always coincident with the orientation of the reinforcing fibers. Hence, these components could produce stress states that approach the off-axis tensile and creep strengths. The CMC investigated was Nextel™720/AS. Nextel™720/AS is composed of an Alumina-Silica matrix reinforced with an eight-harness satin weave (8HSW) of Nextel™720 fibers. Tensile and creeps tests on ±45° Nextel™720/AS were performed to characterize the off-axis material behavior. All elevated temperature tests were performed at 1100°C. The data show that the ultimate strength and the 100 hour creep strength ratio of ±45° to 0°/90° are 0.6 and 0.3, respectively. The creep rupture behavior of the ±45° orientation was compared to the 0°/90° orientation.