Developmente of High Temperature Solid Lubricant Coatings

Period of Performance: 06/01/1997 - 05/28/1998

$100K

Phase 1 STTR

Recipient Firm

Ues, Inc.
4401 Dayton-Xenia Road Array
Dayton, OH 45432
Principal Investigator
Firm POC

Research Institution

Cleveland State University
E. 24th Street, Stillwell Hall 455
Cleveland, OH 44115
Institution POC

Research Topics

Abstract

Solid lubricant coatings are of interest for applications where components are exposed to both low and high temperatures, vacuum, oxidizing environment and radiations. Most common solid lubricant coatings are useful for only a narrow range of temperatures. Known solid lubricants for high temperature applications (>500¦C) exhibit a high friction coefficient, >0.2; and, they are usually abrasive at low temperature. There is a great need, therefore, to develop solid lubricant coatings that possess low friction properties over a wide range of temperature. UES proposes to develop solid lubricant coatings for applications over a wide range of temperature by using an adaptive composite approach where a common solid lubricant such as WS2 will be mixed with an oxide such as cesium tungstate (Cs2WO4). WS2 will provide lubrication in air up to about 450¦C while the reaction product of cesium tungstate and WS2, i.e., cesium oxythiotungstate (Cs2WO3), will provide higher temperature lubrication. Bias sputtering will be used to deposit dense composite coatings. Coatings will be characterized for composition, chemistry, friction and wear.