Tribological Performance of Amphiphobic Aluminum Alloy Surface under Water/Oil Lubrication

doi:10.3901/JME.2016.11.115

Abstract

Abstract: Laser processing is used to build dot and grid micro-structures with spacing of 100 μm on 5083 warship aluminum alloy surface, and the nano-SiO2 powders are coated on the micro-structures to build micro-nano structures for the amphiphobic aluminum alloy surface. The contact angles and roll angles are measured by contact angle measurement. Tribological performance is evaluated by CETR Universal Micro-Tribometer in water and oil lubrication. The results show that the grid surface has the stronger superhydrophobic/oleophobic performance than that of dot, the water contact angle is as high as 159.9 °and the hexadecane contact angle is as high as 147.0 °. With the improvement of the hydrophobic/oleophobic performance, the friction coefficient decreases, the depth of the grinding crack becomes shallower and the width gets narrower. The friction coefficient under oil lubrication is significantly smaller than that of water lubrication, and the grinding crack is shallower and narrower. The friction coefficient of the dot surface is greater than that of the grid surface under water lubrication, while the friction coefficient of the dot surface is smaller than that of the grid surface under oil lubrication.

Key words: oil lubrication, oleophobic, superhydrophobic, water lubrication

CLC Number:

TH117

LIAN Feng, WANG Zengyong, ZHANG Huicheng. Tribological Performance of Amphiphobic Aluminum Alloy Surface under Water/Oil Lubrication[J]. Journal of Mechanical Engineering, 2016, 52(11): 115-120.

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