Macroscale Superlubricity Enabled by Graphene-Coated Surfaces.

ABSTRACT: Friction and wear remain the primary modes for energy dissipation in moving mechanical components. Superlubricity is highly desirable for energy saving and environmental benefits. Macroscale superlubricity was previously performed under special environments or on curved nanoscale surfaces. Nevertheless, macroscale superlubricity has not yet been demonstrated under ambient conditions on macroscale surfaces, except in humid air produced by purging water vapor into a tribometer chamber. In this study, a tribological system is fabricated using a graphene-coated plate (GCP), graphene-coated microsphere (GCS), and graphene-coated ball (GCB). The friction coefficient of 0.006 is achieved in air under 35 mN at a sliding speed of 0.2 mm s^-1 for 1200 s in the developed GCB/GCS/GCP system.

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC7029642 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature