| Tribological behavior of high specific strength PTFE-Al alloy composite |
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| 作者姓名： | 向定汉 潘青林 |
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| 作者单位： | [1]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China [2]School of Materials Science and Engineering, CentraI South ,University, Changsha 410083, China |
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| 摘 要： | 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 2 000 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.
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| 关 键 词： | 聚四氟乙烯 铝合金 复合材料 强度系数 摩擦 磨损 固体润滑 |
| 文章编号： | 1003-6326（2005）06-1290-07 |
| 收稿时间： | 2005-06-14 |
| 修稿时间： | 2005-09-21 |
Tribological behavior of high specific strength PTFE-Al alloy composite |
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| XIANG Ding-han,PAN Qing-lin.Tribological behavior of high specific strength PTFE-Al alloy composite[J].Transactions of Nonferrous Metals Society of China,2005,15(6):1290-1296. |
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| Authors: | XIANG Ding-han PAN Qing-lin |
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| Abstract: | 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 0.13Hz and contact mean pressures from 10 to 80MPa. 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 2000m. 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. |
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| Keywords: | composite friction wear solid lubricant polytetrafluoroethylene(PTFE) Al alloy high load |
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