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RESEARCH PAPERS

Research and Development of Ceramic Turbine Wheels

[+] Author and Article Information
K. Watanabe, M. Masuda, T. Ozawa, M. Matsui

NGK Insulators, Ltd., Nagoya, Japan

K. Matsuhiro

NGK EUROPE GmbH, Eschborn, Germany

J. Eng. Gas Turbines Power 115(1), 36-41 (Jan 01, 1993) (6 pages) doi:10.1115/1.2906683 History: Received February 24, 1992; Online April 24, 2008

Abstract

The bending strength of specimens of various sizes, some of which were cut from a turbine wheel, was compared with predictions using Weibull statistical theory. The stress distribution of a ceramic turbine wheel in spin testing was determined with finite elements and the results were used to analyze a wheel that was spun until it burst. The cause of the burst of the ceramic radial turbine wheel at elevated temperature is discussed and based on the tensile rupture data. A design methodology using the Larson-Miller parameter was found to be applicable to the ceramic components at elevated temperatures.

Copyright © 1993 by The American Society of Mechanical Engineers
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