Chapter 65. Evaluation of Post-Exposure Properties of SiC/SiC Combustor Liners Tested in the RQL Sector Rig

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. Michael J. Verrilli1,
  2. Terry R. Barnett2,
  3. Jiangang Sun3,
  4. George Baaklini4 and
  5. Greg Ojard5

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch65

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

How to Cite

Verrilli, M. J., Barnett, T. R., Sun, J., Baaklini, G. and Ojard, G. (2008) Evaluation of Post-Exposure Properties of SiC/SiC Combustor Liners Tested in the RQL Sector Rig, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch65

Author Information

  1. 1

    NASA Glenn Research Center 21000 Brookpark Road Cleveland, OH 44135

  2. 2

    Southern Research Institute 757 Tom Martin Drive Birmingham, AL

  3. 3

    Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439

  4. 4

    NASA Glenn Research Center 21000 Brookpark Road Cleveland, OH 44135

  5. 5

    United Technologies Research Center 411 Silver Lane East Hartford, CT 06108

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375785

Online ISBN: 9780470294741

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Keywords:

  • silicon carbide;
  • ultrasonic techniques;
  • combustor;
  • durability;
  • mechanical properties

Summary

Silicon carbide fiber-reinforced silicon carbide matrix (SiC/SiC) composite components were tested in an aircraft combustion environment using the Rich-burn, Quick-quench, Lean-burn (RQL) sector rig. To assess the condition of the SiC/SiC liners after combustor testing, their mechanical properties were measured. Specimens were machined from two of the sector rig components, the lean transition liners (LTLs) and the lean zone inner diameter liners (LZIDs) that were tested for various times to obtain post-exposure strengths. The average strength for the LTLs tested up to 260 hours was the same as average strengths obtained from witness coupons machined from the as-manufactured components. However, for the LZIDs, post exposure strength decreased with increasing exposure time. In addition, NDE results from the as-manufactured components were compared to post-exposure NDE. The techniques employed were able to image significant damage in these combustor liners that manifest itself as low post-exposure strength. The thermography and ultrasonic techniques were particularly effective in finding damage in the lean zone inner diameter liners.