• 文献标题:   Tribological properties of WS2/graphene nanocomposites as lubricating oil additives
  • 文献类型:   Article
  • 作  者:   ZHENG D, WU YP, LI ZY, CAI ZB
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:   2046-2069
  • 通讯作者地址:   Southwest Jiaotong Univ
  • 被引频次:   18
  • DOI:   10.1039/c6ra28028e
  • 出版年:   2017

▎ 摘  要

In this study, we prepared a new composite material of graphene (GP) anchored with WS2 nanoparticles (WS2/GP). The lubricating potential of the as-prepared nanocomposites as oil additives was investigated with sliding steel-on-steel contact using a UMT-2 ball-on-plate tribotester. The oil dispersed with WS2/GP displays remarkable lubricating performance; the friction coefficient and the wear rate were reduced by 70.2% and 65.8%, respectively, when 0.02-0.04 wt% WS2/GP was added to the base oil. Its friction-reducing and antiwear abilities were also superior to those of oil containing a single nanomaterial of GP or WS2 nanoparticles (nano-WS2) and oil dispersed with a physical mixture of nano-WS2 and GP. WS2/GP may deposit on the wear surfaces and form a protective film, which improves the contact state of the sliding interfaces. Moreover, a synergistic lubricating action between the GP and nano-WS2 in the WS2/GP nanocomposites was revealed. We suggest that these two nano-additives cooperatively work, which enhances the adsorption of GP layers and deposition of nano-WS2, thereby resulting in an improved protective and repairing effect.