Some composite bearing and seal materials for gas turbine applications - A reviewA review is made 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 and as Stirling cylinder liner materials, and as backup lubricants for compliant foil gas bearings.
Document ID
19900036783
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sliney, Harold E. (NASA Lewis Research Center Cleveland, OH, United States)