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Exposure of Ceramics and Ceramic Matrix Composites in Simulated and Actual Combustor Environments PUBLIC ACCESS

[+] Author Affiliations
Karren L. More, Peter F. Tortorelli, Mattison K. Ferber, Larry R. Walker, James R. Keiser

Oak Ridge National Laboratory, Oak Ridge, TN

Narendernath Miriyala, William D. Brentnall, Jeffrey R. Price

Solar Turbines Incorporated, San Diego, CA

Paper No. 99-GT-292, pp. V004T02A009; 9 pages
doi:10.1115/99-GT-292
From:
  • ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General
  • Indianapolis, Indiana, USA, June 7–10, 1999
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7861-3
  • Copyright © 1999 by ASME

abstract

A high-temperature, high-pressure, tube furnace has been used to evaluate the long term stability of different monolithic ceramic and ceramic matrix composite materials in a simulated combustor environment. All of the tests have been run at 150 psia, 1204°C, and 15% steam in incremental 500 h runs. The major advantage of this system is the high sample throughput; >20 samples can be exposed in each tube at the same time under similar exposure conditions. Microstructural evaluations of the samples were conducted after each 500 h exposure to characterize the extent of surface damage, to calculate surface recession rates, and to determine degradation mechanisms for the different materials. The validity of this exposure rig for simulating real combustor environments was established by comparing materials exposed in the test rig and combustor liner materials exposed for similar times in an actual gas turbine combustor under commercial operating conditions.

Copyright © 1999 by ASME
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