织构表面在油和水中的润湿性及摩擦学性能

doi:10.11901/1005.3093.2017.270

材料研究学报

2018, Vol. 32

Issue (3): 191-199 DOI: 10.11901/1005.3093.2017.270

研究论文

本期目录 | 过刊浏览

织构表面在油和水中的润湿性及摩擦学性能

马明明, 连峰(

), 姜康, 张会臣

大连海事大学交通运输装备与海洋工程学院大连 116026;

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;

引用本文:

马明明, 连峰, 姜康, 张会臣. 织构表面在油和水中的润湿性及摩擦学性能[J]. 材料研究学报, 2018, 32(3): 191-199.
Mingming MA, Feng LIAN, Kang JIANG, Huichen ZHANG. Wettability and Tribological Performance of Texture Surface in Oil and Water[J]. Chinese Journal of Materials Research, 2018, 32(3): 191-199.

全文: PDF(6211 KB) HTML

摘要:

为研究织构形貌对表面润湿性和摩擦学性能的影响,建立凹坑表面流体动压润滑数学模型,计算底面为正方形的棱柱和圆台形凹坑表面的润滑膜动压承载力。计算结果表明,凹坑面积率为19.6%时,圆台形凹坑表面的流体动压润滑膜承载力是棱柱凹坑表面的2.4倍。利用激光加工技术,在5083船用铝合金表面加工与数学模型一致的棱柱形和圆台形凹坑织构,利用低表面能修饰和溶胶凝胶法涂敷SiO₂改变表面润湿性能。接触角测试显示,棱柱形凹坑表面的接触角比圆台形凹坑表面大2°~4°。摩擦实验显示,将织构和化学组分相结合的双疏表面可以显著地提高摩擦学性能。圆台形凹坑表面的摩擦学性能优于棱柱形凹坑表面,与计算结果相符。凹坑形貌对表面摩擦学性能的影响大于对表面润湿性的影响。

关键词 ：材料表面与界面, 摩擦学性能, 织构, 润滑膜承载力, 润湿性, 润滑介质

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 SiO₂coating 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.

Key words： surface and interface in the materials tribological performance texture lubricating film carrying capacity wettability lubricant

收稿日期: 2017-04-20

ZTFLH:

TG146

基金资助:国家自然科学基金(51275064和50975036),中央高校基本科研业务费专项资金(3132016354),辽宁省工业公关计划(2012220006)

作者简介:

作者简介马明明, 男, 1989年生, 硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.270 或 https://www.cjmr.org/CN/Y2018/V32/I3/191

图1 摩擦副和织构单元示意图

图2 油介质中的无量纲润滑膜压力分布

图3 表面织构的三维形貌

图4 凹坑的横截面形貌

表1 试样的接触角和滚动角

图5 棱柱形和圆台形凹坑表面在不同介质中的摩擦系数

表2 试样的平均摩擦系数

图6 涂覆SiO2试样的磨痕图

表3 试样的磨损量

图7 空白织构试样的磨屑和EDS分析

图8 空白织构试样的磨痕

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