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Title: Operando tribochemical formation of onion-like-carbon leads to macroscale superlubricity

Journal Article · · Nature Communications

Stress-induced reactions at the sliding interface during relative movement are known to cause structural or chemical modifications in contacting materials. The nature of these modifications at the atomic level and formation of byproducts in an oil-free environment, however, remain poorly understood and pose uncertainties in predicting the tribological performance of the complete tribosystem. Here, we demonstrate that tribochemical reactions occur even in dry conditions when hydrogenated diamond-like carbon (H-DLC) surface is slid against two-dimensional (2D) molybdenum disulfide along with nanodiamonds in dry nitrogen atmosphere. Detailed experimental studies coupled with reactive molecular dynamics simulations reveal that at high contact pressures, diffusion of sulfur from the dissociated molybdenum disulfide led to amorphization of nanodiamond and subsequent transformation to onion-like carbon structures (OLCs). The in situ formation of OLCs at the sliding interface provide reduced contact area as well as incommensurate contact with respect to the H-DLC surface, thus enabling successful demonstration of superlubricity.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-06CH11357; AC02-05CH11231
OSTI ID:
1460812
Alternate ID(s):
OSTI ID: 1490201
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 163 works
Citation information provided by
Web of Science

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Cited By (13)

Iron‐Nanoparticle Driven Tribochemistry Leading to Superlubric Sliding Interfaces journal September 2019
Neutron visualization of inhomogeneous buried interfaces in thin films journal January 2019
Beyond traditional coatings, a review on thermal sprayed functional and smart coatings text January 2018
Black Phosphorus–Graphene Oxide Hybrid Nanomaterials toward Advanced Lubricating Properties under Water journal September 2019
Emerging superlubricity: A review of the state of the art and perspectives on future research journal December 2018
Triboemission of hydrocarbon molecules from diamond-like carbon friction interface induces atomic-scale wear journal November 2019
Visible-light photocatalysis by carbon-nano-onion-functionalized ZnO tetrapods: degradation of 2,4-dinitrophenol and a plant-model-based ecological assessment journal February 2019
Unusual Competitive and Synergistic Effects of Graphite Nanoplates in Engine Oil on the Tribofilm Formation journal August 2019
Superlubricity in rolling/sliding contacts journal September 2019
Beyond Traditional Coatings: A Review on Thermal-Sprayed Functional and Smart Coatings journal April 2019
Material‐Dependent Antagonistic Effects between Soot and ZDDP journal February 2020
Nanomaterials in Superlubricity journal April 2019
In situ formation of spherical MoS 2 nanoparticles for ultra-low friction journal January 2018

Figures / Tables (4)


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