Effect of graphene addition and tribological performance of Al 6061/graphene flake composite
Effect of graphene addition and tribological performance of Al 6061/graphene flake composite
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DOI：
10.1080/17515831.2017.1329920
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发表时间：
2017-01-01
影响因子：
1.3
通讯作者：
Xavior, M. Anthony
中科院分区：
文献类型：
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作者：
Kumar, H. G. Prashantha;Xavior, M. Anthony
毫无疑问，石墨烯因其单原子厚度和二维形态的广泛物理特性而引起了人们的广泛研究兴趣。目前的研究重点是石墨烯在降低 Al 6061 石墨烯增强金属基复合材料 (MMC) 磨损和摩擦系数方面的作用。选择0.3、0.6和0.9 wt%的石墨烯作为增强材料，研究干磨损条件下的自润滑性能，并通过超声波液体处理器进行处理。采用销盘式摩擦磨损试验机进行干摩擦磨损试验，评估复合材料中石墨烯含量在不同法向载荷（5、10、15 N）和盘滑动速度（0.4、0.8、1.2 m/s）条件下的影响。结果表明，与纯合金相比，硬度和耐磨性显着提高，摩擦系数 (mu) 值降低。算术平均表面粗糙度值 (R-a)、最大轮廓峰 (R-p) 和最大谷深 (R-v) 均低于纯合金。由于摩擦学潜力以及改进的强度和表面粗糙度值，Al 6061-石墨烯复合材料是所有遭受摩擦和磨损的应用的绝佳选择。
Graphene, no wonder has attracted a significant research interest due to its extensive physical properties at its single atomic thickness and 2D morphology. The current studies focus on the role of graphene in reducing the wear and frictional coefficient of Al 6061-graphene-reinforced metal-matrix composites (MMC's). Reinforcement chosen is 0.3, 0.6 and 0.9 wt% of graphene to investigate the self-lubricating property under dry wear condition and processed through the ultrasonic liquid processor. The dry frictional wear test was carried out using pin-on-disc tribometer to evaluate the effect of graphene content in the composites under various normal load (5, 10, 15 N) and disc sliding speed (0.4, 0.8, 1.2 m/s) conditions. The results show that there is a significant increase in the hardness and wear resistance and a reduction in the coefficient of friction (mu) values compared to pure alloys. Arithmetic mean surface roughness values (R-a), max profile peak (R-p) and max valley depth (R-v) are found to be comparatively lower than the pure alloy. Due to the tribological potential coupled with improved strength and surface roughness values, Al 6061-graphene composite are excellent candidates for all applications where it is subjected to Friction and wear.