Environmental Characterization of Monolithic Ceramics for Gas Turbine Applications

Author:

Ferber Mattison K.,Lin Hua Tay1

Affiliation:

1. Oak Ridge National Laboratory

Abstract

Over the last 30 years, a number of programs in Russia, Europe, Japan, and the United States have sought to introduce monolithic ceramic components into gas turbines with the goals of increasing efficiency and lowering emissions. High performance silicon nitride and silicon carbide ceramics typically have been leading candidates for use in these applications. Recent field tests involving silicon nitride vanes and blades have shown that these materials can experience significant recession due to the loss of the normally protective silica scale. This paper first summarizes key findings from these field tests and then describes a relatively simple method for evaluating environmental effects in a laboratory environment.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Reference21 articles.

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4. W. D. Carruthers, D. W. Richerson, and K. W. Benn, 3500-Hour Durability Testing of Commercial Ceramic Materials Interim Report, DOE/NASA/0027-80/1, NASA Report CR-159785, NASA Lewis Research Center, Cleveland, OH, (1980).

5. A. K. Misra, A. M. Johnson, and B. J. Bartlett, Progress Toward Meeting Material Challenges for High Speed Civil Transport Propulsion, Proceedings of the 14 th International Symposium on Air Breathing Engines, Waltrup, P. J., ed., International Society for Air Breathing Engines, Chattanooga, TN. (1999).

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