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The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations

The interfacial friction performances of graphene covered and hydrogen-terminated diamond surfaces were investigated comparatively by first-principles calculations within density functional theory (DFT). Both systems exhibit similar excellent lubricating effects under small load, but the graphene co...

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Autores principales: Wang, Jianjun, Li, Lin, Yang, Wentao, Li, Meng, Guo, Peng, Zhao, Bin, Yang, Linfeng, Fang, Lili, Sun, Bin, Jia, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6955720/
https://www.ncbi.nlm.nih.gov/pubmed/31888134
http://dx.doi.org/10.3390/nano9121784
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author Wang, Jianjun
Li, Lin
Yang, Wentao
Li, Meng
Guo, Peng
Zhao, Bin
Yang, Linfeng
Fang, Lili
Sun, Bin
Jia, Yu
author_facet Wang, Jianjun
Li, Lin
Yang, Wentao
Li, Meng
Guo, Peng
Zhao, Bin
Yang, Linfeng
Fang, Lili
Sun, Bin
Jia, Yu
author_sort Wang, Jianjun
collection PubMed
description The interfacial friction performances of graphene covered and hydrogen-terminated diamond surfaces were investigated comparatively by first-principles calculations within density functional theory (DFT). Both systems exhibit similar excellent lubricating effects under small load, but the graphene covered interface presents small friction than that of hydrogenated system for the larger load. The calculated interfacial friction between two sheets of graphene covered diamond surface increases slowly than that of hydrogenated system in a wide range of pressure scale, and the friction difference between the two systems increases with increasing external pressure, indicating that graphene has flexible lubricating properties with high load-carrying capacity. This behavior can be attributed to the large interlayer space and a more uniform interlayer charge distribution of graphene covered diamond interface. Our investigations suggest that graphene is a promising candidate as solid lubricate used in diamond film, and are helpful for the understanding of interfacial friction properties of diamond film.
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spelling pubmed-69557202020-01-23 The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations Wang, Jianjun Li, Lin Yang, Wentao Li, Meng Guo, Peng Zhao, Bin Yang, Linfeng Fang, Lili Sun, Bin Jia, Yu Nanomaterials (Basel) Article The interfacial friction performances of graphene covered and hydrogen-terminated diamond surfaces were investigated comparatively by first-principles calculations within density functional theory (DFT). Both systems exhibit similar excellent lubricating effects under small load, but the graphene covered interface presents small friction than that of hydrogenated system for the larger load. The calculated interfacial friction between two sheets of graphene covered diamond surface increases slowly than that of hydrogenated system in a wide range of pressure scale, and the friction difference between the two systems increases with increasing external pressure, indicating that graphene has flexible lubricating properties with high load-carrying capacity. This behavior can be attributed to the large interlayer space and a more uniform interlayer charge distribution of graphene covered diamond interface. Our investigations suggest that graphene is a promising candidate as solid lubricate used in diamond film, and are helpful for the understanding of interfacial friction properties of diamond film. MDPI 2019-12-16 /pmc/articles/PMC6955720/ /pubmed/31888134 http://dx.doi.org/10.3390/nano9121784 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Jianjun
Li, Lin
Yang, Wentao
Li, Meng
Guo, Peng
Zhao, Bin
Yang, Linfeng
Fang, Lili
Sun, Bin
Jia, Yu
The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations
title The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations
title_full The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations
title_fullStr The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations
title_full_unstemmed The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations
title_short The Flexible Lubrication Performance of Graphene Used in Diamond Interface as a Solid Lubricant: First-Principles Calculations
title_sort flexible lubrication performance of graphene used in diamond interface as a solid lubricant: first-principles calculations
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6955720/
https://www.ncbi.nlm.nih.gov/pubmed/31888134
http://dx.doi.org/10.3390/nano9121784
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