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Corrosion Issues for Ceramics in Gas TurbinesThe requirements for hot-gas-path materials in gas turbine engines are demanding. These materials must maintain high strength and creep resistance in a particularly aggressive environment. A typical gas turbine environment involves high temperatures, rapid gas flow rates, high pressures, and a complex mixture of aggressive gases. Over the past forty years, a wealth of information on the behavior of ceramic materials in heat engine environments has been obtained. In the first part of the talk we summarize the behavior of monolithic SiC and Si3N4. These materials show excellent baseline behavior in clean, oxygen environments. However the aggressive components in a heat engine environment such as water vapor and salt deposits can be quite degrading. In the second part of the talk we discuss SiC-based composites. The critical issue with these materials is oxidation of the fiber coating. We conclude with a brief discussion of future directions in ceramic corrosion research.
Document ID
20050203985
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Jacobson, Nathan
(NASA Glenn Research Center Cleveland, OH, United States)
Opila, Elizabeth
(NASA Glenn Research Center Cleveland, OH, United States)
Nickel, Klaus G.
(Tuebingen Univ. Germany)
Date Acquired
September 8, 2013
Publication Date
January 1, 2004
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: 28th Annual International Conference and Exposition on Advanced Ceramics and Composites
Location: Cocoa Beach, FL
Country: United States
Start Date: January 25, 2004
End Date: January 30, 2004
Sponsors: American Ceramic Society
Funding Number(s)
OTHER: 22-714-30-09
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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