The oxidation‐treated interface on tribological properties of carbon fibers‐reinforced PTFE composite under oil‐lubricated condition
The oxidation‐treated interface on tribological properties of carbon fibers‐reinforced PTFE composite under oil‐lubricated condition
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DOI：
10.1002/sia.3027
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发表时间：
2009-04
影响因子：
1.7
通讯作者：
J. Li;Y. Su
中科院分区：
文献类型：
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作者：
J. Li;Y. Su
研究了空气氧化和臭氧表面处理对碳纤维增强聚四氟乙烯(PTFE)复合材料在油润滑条件下摩擦学性能的影响。实验结果表明，经臭氧处理的碳纤维增强聚四氟乙烯(CF-PTFE)复合材料在不同载荷和滑动速度下的摩擦系数和磨损量均低于未处理和空气氧化处理的复合材料。对碳纤维表面的X射线光电子能谱(XPS)研究表明，臭氧处理后，碳纤维表面的氧浓度明显增加，碳纤维表面的含氧基团数量也大大增加。含氧基团含量的增加，增强了碳纤维与聚四氟乙烯的界面粘结。复合材料具有较强的界面粘结力，可以有效地将应力传递到碳纤维上，使碳纤维与聚四氟乙烯基体牢固结合，防止聚四氟乙烯的大规模剥离，从而提高了复合材料的摩擦学性能。版权所有©2009 John Wiley&Sons，Ltd.
The effect of air oxidation and ozone surface treatment of carbon fibers (CF) on tribological properties of CF reinforced polytetrafluoroethylene (PTFE) composites under oil‐lubricated condition was investigated. Experimental results revealed that ozone treated CF reinforced PTFE (CF–PTFE) composite had the lowest friction coefficient and wear under various applied loads and sliding speeds compared with untreated and air‐oxidated composites. X‐ray photoelectron spectroscopy (XPS) study of carbon fiber surface showed that, after ozone treatment, oxygen concentration was obviously increased, and the amount of oxygen‐containing groups on CF surfaces was largely increased. The increase in the amount of oxygen‐containing groups enhanced interfacial adhesion between CF and PTFE matrix. With strong interfacial adhesion of the composite, stress could be effectively transmitted to carbon fibers; carbon fibers were strongly bonded with PTFE matrix and large scale rubbing‐off of PTFE was prevented, therefore, the tribological properties of the composite were improved. Copyright © 2009 John Wiley & Sons, Ltd.