Some Composite Bearing and Seal Materials for Gas Turbine Applications—A Review

[+] Author and Article Information
H. E. Sliney

NASA Lewis Research Center, Cleveland, OH 44135

J. Eng. Gas Turbines Power 112(4), 486-491 (Oct 01, 1990) (6 pages) doi:10.1115/1.2906193 History: Received January 23, 1989; Online April 24, 2008


A review is given of the selection and tribological testing of materials for high-temperature bearings and seals. The goal is to achieve good tribological properties over a wide range of temperatures, because bearings and seals must be functional from low-temperature start-up conditions on up to the maximum temperatures encountered during engine operation. Plasma-sprayed composite coatings with favorable tribological properties from 25 to 900°C are discussed. The performance of these coatings in simple tribological bench tests is described. Examples are also given of their performance in high-speed sliding contact seals, as Stirling cylinder liner materials, and as backup lubricants for compliant foil gas bearings.

Copyright © 1990 by The American Society of Mechanical Engineers
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