Tribological performance of few layer graphene on textured M2 steel surfaces
Tribological performance of few layer graphene on textured M2 steel surfaces
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DOI：
10.1016/j.surfcoat.2016.04.031
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发表时间：
2016-06-25
影响因子：
5.4
通讯作者：
Li, Lawrence Kwok-Yan
中科院分区：
文献类型：
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作者：
Shi, Zhen;Shum, Powan;Li, Lawrence Kwok-Yan
在这项研究中，我们提出了一种简单有效的方法来增强 M2 钢表面上少层石墨烯的摩擦学性能。采用激光表面毛化方法在M2钢表面加工出不同面积比的微槽。随后，用含石墨烯的乙醇溶液将几层石墨烯薄片滴在纹理表面上。通过球盘摩擦试验机研究了石墨烯的宏观摩擦学性能。结果表明，与裸M2钢相比，适当凹槽面积比（35％和56％）的石墨烯润滑可有效提高耐磨性，这种提高归因于磨屑截留和保护性碳层的形成。尤其是35%的凹槽面积，有足够的石墨烯来减少摩擦，同时也能为高接触应力提供足够的支撑，表现出摩擦行为的明显改善。因此，约 0.22 的低摩擦系数 (COF) 可维持 870 个滑动周期。 (C) 2016 Elsevier B.V. 保留所有权利。
In this study, we propose an easy and effective way to enhance the tribological performance of few layer graphene on M2 steel surfaces. Microgrooves with different area ratios were fabricated on M2 steel surfaces by laser surface texturing method. Subsequently, few layer graphene flakes were dripped on the textured surfaces with graphene-containing ethanol solution. The macro-scale tribological performance of graphene was investigated by ball-on-disk tribometer. The results showed that graphene lubrication with appropriate groove area ratios (35% and 56%) were effective in enhancing the wear resistance compared with that of the bare M2 steel, the improvement was attributed to the effectiveness of wear debris entrapment and the formation of protective carbon layer. Especially with 35% groove area, there was sufficient graphene to reduce the friction, meanwhile, enough support to the high contact stress can be provided as well, demonstrating an obvious improvement in the friction behavior. As a result, low coefficient of friction (COF) around 0.22 can be sustained for 870 sliding cycles. (C) 2016 Elsevier B.V. All rights reserved.