Chapter 65. Evaluation of Post-Exposure Properties of SiC/SiC Combustor Liners Tested in the RQL Sector Rig
- Hua-Tay Lin,
- Mrityunjay Singh
Published Online: 26 MAR 2008
DOI: 10.1002/9780470294741.ch65
Copyright © 2002 The American Ceramic Society
Book Title
26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3
Additional Information
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
Publication History
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2002
Book Series:
ISBN Information
Print ISBN: 9780470375785
Online ISBN: 9780470294741
- Summary
- Chapter
- References
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.