Diamond-like carbon graphene nanoplatelet nanocomposites for lubricated environments
Diamond-like carbon graphene nanoplatelet nanocomposites for lubricated environments
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DOI：
10.1016/j.carbon.2023.01.061
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发表时间：
2023-01
期刊：
影响因子：
10.9
通讯作者：
Rob Brittain;T. Liskiewicz;A. Morina;A. Neville;Liuquan Yang
中科院分区：
文献类型：
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作者：
Rob Brittain;T. Liskiewicz;A. Morina;A. Neville;Liuquan Yang
类金刚石碳（DLC）和石墨烯纳米片（GNP）纳米复合材料的摩擦学行为以前没有在润滑环境中进行过探索，一些以前的研究仅报道了DLC表面上的石墨烯材料。在这项研究中，DLC-GNP纳米复合材料薄膜与各种GNP覆盖率合成的3个步骤的过程：旋涂GNP悬浮液，热处理，和DLC沉积。在这项研究中，GNP覆盖度对DLC-GNP纳米复合材料膜的机械性能和摩擦学响应的影响在升高的温度下在基础油润滑的环境中对铸铁销进行了研究。该研究表明，随着GNP覆盖率的增加，DLC-GNP纳米复合材料的摩擦和磨损降低，其中最低的摩擦（COF = 0.03）和磨损（1.6 × 10− 19 m3/Nm−1）在4.5%的覆盖率下实现。该研究报告了将GNP添加到DLC基质中通过在配对体上产生高度石墨化的转移膜来降低摩擦和磨损，但是对于更高的GNP覆盖率，记录了在GNP岛的旋涂期间的团聚，导致在滑动磨损期间GNP的去除，从而否定了GNP的摩擦降低效果。
The tribological behaviour of diamond-like carbon (DLC) and graphene nanoplatelets (GNP) nanocomposite has not been previously explored in a lubricated environment, with some previous studies reporting only on graphene materials on the surface of the DLC. In this study DLC-GNP nanocomposite films with various GNP coverages were synthesised by a 3 step process: spin coating a GNP suspension, heat treatment, and DLC deposition. In this study, the effect of the GNP coverage on the mechanical properties, and tribological response of the DLC-GNP nanocomposite film were studied at elevated temperatures against a cast iron pin in a base-oil lubricated environment. The study shows decrease in friction and wear of the DLC-GNP nanocomposites as the GNP coverage increased, with the lowest friction (COF ∼0.03) and wear (∼1.6 × 10−19m3/Nm−1) achieved with a 4.5% coverage. This study reports the addition of GNP into the DLC matrix reduced both friction and wear by creating a highly graphitic transfer film on the counter-body, but for higher GNP coverages agglomeration during the spin coating of GNP islands were recorded, leading to removal of the GNP during sliding wear negating the friction reduction effect of the GNP.