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536667 
Journal Article 
Tribological behavior of high specific strength PTFE-Al alloy composite 
Xiang, DH; Pan, QL 
2005 
1 
Transactions of Nonferrous Metals Society of China
ISSN: 1003-6326 
15 
6 
1290-1296 
English 
Solid lubricants lead to substantial weight savings relative to the use of liquid lubricant, especially in the weight-conscious aerospace industry. A new PTFE-Al alloy composite(A) containing 60% area proportion of PTFE composite was developed. Another type of common metal-plastics multilayer composite, also called DU, was selected for a comparative investigation. Friction and wear tests were carried out in an oscillating sliding tribotester in air at an oscillating frequency of 0.13 Hz and contact mean pressures from 10 to 80 MPa. The composites slid against a 38CrMoAlA steel shaft. The results show that the composite A exhibits low coefficient of dry sliding friction less than 0.1 and long wear life of 2000 m. This is because the composite A can provide a sufficient solid lubrication during the whole tests. SEM examination of the transfer films for the composite A confirms that uniform, thin and coherent transfer films are prerequisites for low friction and good wear resistance. 
composite; friction; wear; solid lubricant; polytetrafluoroethylene(PTFE); Al alloy; high load; wear; friction