Graphene - MoS2 ensembles to reduce friction and wear in DLC-Steel contacts
Graphene - MoS2 ensembles to reduce friction and wear in DLC-Steel contacts
复制标题
DOI：
10.1016/j.carbon.2019.02.047
复制
发表时间：
2019-05-01
期刊：
影响因子：
10.9
通讯作者：
Sumant, Anirudha, V
中科院分区：
文献类型：
--
作者：
Mutyala, Kalyan C.;Wu, Yimin A.;Sumant, Anirudha, V
最近，二维(2D)固体润滑材料被证明可以将摩擦降低到无法测量的水平(超润滑性)，并在宏观范围内减少磨损，这推动了进一步的研究调查，以探索它们在工业相关材料组合(如滑动接触中的钢和类金刚石碳(DLC))中的潜力。在这项研究中，我们使用了2D材料的组合，即石墨烯和MoS_2作为固体润滑剂，以减少钢氢类金刚石接触中的摩擦和磨损，即使在高接触压力和滑动速度下也是如此。在干氮气条件下进行的滑动摩擦试验表明，与钢与H-DLC(基线)试验相比，摩擦和磨损分别降低了16倍和29倍，与自匹配钢相比，摩擦和磨损分别降低了43倍和434倍。材料对的光学和拉曼研究以及电子显微镜下的磨屑分析表明，在滑动界面处形成了非晶态碳混合石墨烯层，从而显著降低了摩擦磨损。(C)2019年由爱思唯尔有限公司出版。
Recent demonstration of two dimensional (2D) solid lubricant materials to minimize friction to unmeasurable levels (superlubricity) and reduce wear at macroscale propelled further research investigations in the direction of exploring their potential in industrially relevant material combinations such as steel and diamond-like-carbon (DLC) in sliding contact. In this study, we have used a combination of 2D materials i. e. Graphene and MoS2 as a solid lubricant to reduce friction and wear in steelhydrogenated DLC contacts even at high contact pressures and sliding speed. Sliding friction tests conducted under dry nitrogen conditions shows a reduction of friction and wear by 16 and 29 times, respectively as compared to Steel vs H-DLC (baseline) experiments and friction and wear by a factor of 43 and 434, respectively, compared to self-mated steel vs steel experiments. Optical and Raman investigations of the material pairs and the wear debris analysis in TEM indicated the formation of amorphous carbon mixed graphene layers at the sliding interface leading to such dramatic reductions in friction and wear. (c) 2019 Published by Elsevier Ltd.