• 文献标题:   Atomistic perspective of how graphene protects metal substrate from surface damage in rough contacts
  • 文献类型:   Article
  • 作  者:   HE X, BAI QS, SHEN RQ
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Harbin Inst Technol
  • 被引频次:   5
  • DOI:   10.1016/j.carbon.2018.01.023
  • 出版年:   2018

▎ 摘  要

In recent years, many attempts have been made to explore the protective capability of graphene as an anti-wear coating for nanotribology. By the molecular dynamics simulations of the nanoindentation of a graphene/Fe (110) system, we provide a new insight into the atomistic mechanism of how graphene protects a metal substrate during a rough contacting process. We demonstrate that, in rough contacts, graphene can increase the loading area and homogenize the contact stress. It can weaken the effect of the surface roughness, reduce the magnitude of the contact stress and change its distribution. Finally, graphene can inhibit the nucleation of the surface dislocation and improve the load bearing capacity. These findings demonstrate that graphene holds great promise as effective protective coatings for contact damage. (c) 2018 Elsevier Ltd. All rights reserved.