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Verification of an EBC’s Protective Capability by First-Stage Evaluation in a High Temperature, High-Pressure Furnace

[+] Author Affiliations
Karren L. More, Peter F. Tortorelli, Larry R. Walker

Oak Ridge National Laboratory, Oak Ridge, TN

Paper No. GT2003-38923, pp. 669-675; 7 pages
doi:10.1115/GT2003-38923
From:
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 1: Turbo Expo 2003
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3684-3 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME

abstract

High-temperature, high-pressure exposure furnaces (commonly referred to as Keiser Rigs) have been used successfully to evaluate the ability of environmental barrier coatings (EBCs) on continuous fiber-reinforced ceramic matrix composites and monolithic Si3 N4 to protect the underlying substrate at high temperatures and H2 O pressures. The ORNL rig provides for a relatively inexpensive way to conduct high sample throughput, first-stage evaluation of an EBCs protective capability on small ceramic specimens under a range of temperatures, pressures, and H2 O contents. The exposure of the EBCs in the Keiser Rig is coupled with extensive microstructural analysis to evaluate EBC failure and degradation mechanisms.

Copyright © 2003 by ASME

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