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Wettability and Tribological Performance of Texture Surface in Oil and Water |
Mingming MA, Feng LIAN(), Kang JIANG, Huichen ZHANG |
College of Transporation Equipments and Ocean Engineering, Dalian Maritime University, Dalian 116026, China; |
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Cite this article:
Mingming MA, Feng LIAN, Kang JIANG, Huichen ZHANG. Wettability and Tribological Performance of Texture Surface in Oil and Water. Chinese Journal of Materials Research, 2018, 32(3): 191-199.
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Abstract In order to study the effect of the form of surface texture on the wettability and tribological performance of materials in oil and water, a theoretical model of hydrodynamic lubrication of textured surface is established to calculate the carrying capacity of the hydrodynamic lubricating film for material with surface texture composed of prism- and cone frustum- like concaves. The calculated results indicate that the carrying capacity of the hydrodynamic lubricating film of the surface with cone frustum-like concaves is 2.4 times larger than that with prism-like ones in case of the area ratio of concaves is 19.6%. According to the above theoretical mode, surface texture composed of prism- and cone frustum-like concaves respectively was established on 5083 Al-alloy via laser processing and then was surface modified with sol-gel SiO2 coating of low-surface energy. The test result shows that the contact angle of the surface with prism-like concaves is 2°~4° bigger than that with cone frustum-like ones. While with two surface textures plus amphiphobic coating, the tribological performance the 5083 Al-alloy can be significantly enhanced. Besides, the tribological performance of the 5083 Al-alloy with surface texture of cone frustum-like concaves is better than that of prism ones, which is consistent with the calculation results. Finally, the effect of the shape of concaves on the tribological performance is greater than that on the wettability.
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Received: 20 April 2017
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Fund: Supported by National Natural Science Foundation of China (Nos.5127506 & 50975036), Fundamental Research Funds for the Central Universities (No.3132016354) and Industrial Research Program of Liaoning Province (No.2012220006) |
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