NTRS - NASA Technical Reports Server

Back to Results
Carbon-carbon piston developmentA new piston concept, made of carbon-carbon refractory-composite material, has been developed that overcomes a number of the shortcomings of aluminum pistons. Carbon-carbon material, developed in the early 1960's, is lighter in weight than aluminum, has higher strength and stiffness than aluminum and maintains these properties at temperatures over 2500 F. In addition, carbon-carbon material has a low coefficient of thermal expansion and excellent resistance to thermal shock. An effort, called the Advanced Carbon-Carbon Piston Program was started in 1986 to develop and test carbon-carbon pistons for use in spark ignition engines. The carbon-carbon pistons were designed to be replacements for existing aluminum pistons, using standard piston pin assemblies and using standard rings. Carbon-carbon pistons can potentially enable engines to be more reliable, more efficient and have greater power output. By utilizing the unique characteristics of carbon-carbon material a piston can: (1) have greater resistance to structural damage caused by overheating, lean air-fuel mixture conditions and detonation; (2) be designed to be lighter than an aluminum piston thus, reducing the reciprocating mass of an engine, and (3) be operated in a higher combustion temperature environment without failure.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Gorton, Mark P.
(Lockheed Engineering and Sciences Co. Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1994
Subject Category
Composite Materials
Report/Patent Number
NAS 1.26:4595
Accession Number
Funding Number(s)
PROJECT: RTOP 505-70-63-01
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available