Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9679302 | Wear | 2005 | 6 Pages |
Abstract
To prevent surface damage, roughening, and wear of foil bearings during startup and shutdown conditions when speeds become insufficient to provide hydrodynamic air films, plasma-sprayed solid lubricant PS304 has been used as a journal coating. With increasing demands for operational bearing temperature, Rene 41 is one candidate material that may be considered as a replacement for current Inconel X-750 foil materials. In this study, the tribological behavior of plasma-sprayed PS304 coatings, as well as potentially smoother HVOF-sprayed PS304 coatings, was characterized against Rene 41 and Inconel X-750 counterfaces in thrust-washer tests. Tribological behavior of Rene 41 against plasma- and HVOF-sprayed PS304 coatings, and uncoated 13-8 stainless steel, at 538 °C was found to be equivalent to the high-temperature behavior of Inconel X-750 against the same surfaces. Typical wear factors found for the coatings were in 1.5-3 Ã 10â4 mm3/N m range, while the coefficients of friction were generally about 0.4.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Edin E. BaliÄ, Thierry A. Blanchet,