High temperature solid lubricant materials for heavy duty and advanced heat engines
- Resource Type
- Conference
- Authors
- Source
- Conference: American Society of Mechanical Engineers fall technical conference,LaFayette, IN (United States),2-5 Oct 1994; Other Information: PBD: [1994]
- Subject
- 33 ADVANCED PROPULSION SYSTEMS HEAT ENGINES
SOLID LUBRICANTS
TRIBOLOGY 330000
ADVANCED PROPULSION SYSTEMS
- Language
- English
Advanced engine designs incorporate higher mechanical and thermal loading to achieve efficiency improvements. This approach often leads to higher operating temperatures of critical sliding elements (e.g. piston ring/cylinder wall contacts and valve guides) which compromise the use of conventional and even advanced synthetic liquid lubricants. For these applications solid lubricants must be considered. Several novel solid lubricant composites and coatings designated PS/PM200 have been employed to dry and marginally oil lubricated contacts in advanced heat engines. These applications include cylinder kits of heavy duty diesels, and high temperature sterling engines, sidewall seals of rotary engines and various exhaust valve and exhaust component applications. The following paper describes the tribological and thermophysical properties of these tribomaterials and reviews the results of applying them to engine applications. Other potential tribological materials and applications are also discussed with particular emphasis to heavy duty and advanced heat engines.