摘要
石墨烯作为涂层材料可以减少机械作业中工件的磨损。然而,由于制备工艺的限制,石墨烯涂层仍存在一些缺陷。针对石墨烯涂层的阶梯状缺陷,通过采用分子动力学方法,研究不同压力和不同阶梯层数对摩擦特性的影响,结果表明:向下压力增加了石墨烯台阶处的摩擦力;石墨烯层数增加了石墨烯台阶处的摩擦力;在台阶处切割压头可增加石墨烯系统的能量。随着向下压力的增加,能量增加更加明显,这降低了石墨烯的稳定性,增大了石墨烯的损伤概率。
Graphene as a coating material can reduce the wear of workpieces in mechanical operations. However, due to the limitations of the preparation process, graphene coatings still have some defects. Aiming at the step-like defects of graphene coatings,the effects of different pressures and the number of step layers on the friction characteristics were studied by using molecular dynamics method. The results showed that the downward pressure increased the friction force at the graphene steps;the graphene layers. The number increases the friction force at the graphene step, cutting the indenter at the step increases the energy of the graphene system. As the downward pressure increases, the energy increase is more obvious, which reduces the stability of graphene and increases the damage probability of graphene.
作者
李永旭
欧阳再东
LI Yong-xu;OU YANG Zai-dong(Intelligent Manufacturing College,Hunan Sany Industrial Vocational and Technical College,Changsha 400410,China)
出处
《化工管理》
2022年第30期80-83,共4页
Chemical Engineering Management
关键词
石墨烯
阶梯边缘
摩擦
能量
分子动力学
graphene
ladder edge
friction
energy
molecular dynamics
