U. S. Army Workshop on Low Heat Rejection Engines (4th)
Abstract
There are a number of characteristics exhibited by ceramic materials which may provide potential benefits for the reciprocating internal combustion engine. However, the brittle nature of these materials together with a variability in strength has created difficulties in applying ceramic materials to the engine environment. Although a wide range of physical properties is available from contemporary ceramic materials, a material offering consistently high strength has yet to be developed. For sliding contact applications, desirable characteristics include good wear resistance, low friction, ability to join metals and good heat dissipation. Test results have shown that cam/follower components with cast iron cam sliding on a silicon nitride follower exhibit very low wear rates. The application of silicon carbide to face seals has also shown substantial reductions in both friction and wear when compared with conventional materials. The use of ceramic materials for in-cylinder components requires additional material characteristics such as high strength and low thermal conductivity. Another attractive application for ceramic materials has been the exhaust port liner. The primary requirements for this application are high thermal shock resistance and low thermal conductivity. Of all the materials evaluated, aluminium titanate has been found to exhibit the most attractive characteristics. Keywords: Combustion chambers; Cylinder heads.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1989
- Accession Number
- ADA212378
Entities
People
- G. M. Hamilton
- N. Jackson
- T. H. Childs
Organizations
- University of Leeds