Zhang, Z;
Du, Y;
Huang, S;
Meng, F;
Chen, L;
Xie, W;
Chang, K;
... Guo, D; + view all
(2020)
Macroscale Superlubricity Enabled by Graphene-Coated Surfaces.
Advanced Science
, 7
(4)
, Article 1903239. 10.1002/advs.201903239.
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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. To the best of the knowledge, for the first time, macroscale superlubricity on macroscale surfaces under ambient conditions is reported. The mechanism of macroscale superlubricity is due to the combination of exfoliated graphene flakes and the swinging and sliding of the GCS, which is demonstrated by the experimental measurements, ab initio, and molecular dynamics simulations. These findings help to bridge macroscale superlubricity to real world applications, potentially dramatically contributing to energy savings and reducing the emission of carbon dioxide to the environment.
| Type: | Article |
|---|---|
| Title: | Macroscale Superlubricity Enabled by Graphene-Coated Surfaces |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/advs.201903239 |
| Publisher version: | https://doi.org/10.1002/advs.201903239 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Physical Sciences, Technology, Chemistry, Multidisciplinary, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Chemistry, Science & Technology - Other Topics, Materials Science, ambient conditions, graphene, macroscale superlubricity, macroscale surfaces, molecular dynamics, ULTRA-LOW FRICTION, RAMAN-SPECTROSCOPY, NITROGEN ATMOSPHERE, MOLECULAR-DYNAMICS, FILMS, OXIDE, LUBRICANT, SUBSTRATE, ADHESION, WEAR |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10091618 |
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