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首页> 外文期刊>CERAMICS INTERNATIONAL >Improved tribological properties of Si3N4/GCr15 sliding pairs with few layer graphene as oil additives
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Improved tribological properties of Si3N4/GCr15 sliding pairs with few layer graphene as oil additives

机译：改善Si3N4 / GCR15滑动对的摩擦学特性，用少数层石墨烯作为油添加剂

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摘要

The tribological behaviours of two types of tribo-pairs (Si3N4/GCr15, GCr15/GCr15) lubricated with 4010 aviation lubricants (4010AL) containing different concentrations (0-0.3 wt%) of few layer graphene (FG) were investigated using a four-ball testing machine. Atomic force microscopy (AFM) and Raman spectroscopy were employed to characterise the structure and morphology of FG. Laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Raman spectroscopy were employed to investigate the worn surface. The test results demonstrated that the frictional properties of the Si3N4/GCr15 pairs were significantly improved after adding FG into the base lubricating oil. With the lubricating oil containing 0.075 wt% FG, the friction coefficient and wear scar diameter were reduced by 27% and 43%, respectively. On rubbing surfaces, disordered graphene was obtained as examined by EDS and Raman measurements. The lubrication mechanism was investigated to explain the enhancement in the friction reduction and anti-wear properties, which can be attributed to shearing, tearing, and filling of FG as well as its adhesion to rubbing surfaces, and the mechanical contact between frictional interfaces was avoided.
机译：使用四 - 含有不同浓度（0-0.3wt％）的4010分流润滑剂（4010Al）的含有不同浓度（0-0.3wt％）的含有不同浓度（0-0.3重量％）的少数层石墨烯（FG）的摩擦学性摩擦学行为。球试验机。采用原子力显微镜（AFM）和拉曼光谱来表征FG的结构和形态。采用激光扫描共聚焦显微镜（LSCM），扫描电子显微镜（SEM），能量分散X射线光谱（EDS）和拉曼光谱法研究磨损的表面。测试结果表明，在将FG添加到基础润滑油中后，Si3N4 / GCR15对的摩擦性质显着改善。利用含有0.075wt％FG的润滑油，摩擦系数和磨损瘢痕直径分别降低27％和43％。在摩擦表面上，获得如EDS和拉曼测量检查的紊乱的石墨烯。研究了润滑机制以解释摩擦减少和抗磨损性能的增强，这可以归因于FG的剪切，撕裂和填充，以及其对摩擦表面的粘附性，并且避免了摩擦界面之间的机械接触。

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