Frictional dependence of graphene and carbon nanotube in diamond-like carbon/ionic liquids hybrid films in vacuum

The use of graphene and multi-walled carbon nanotubes (MWCNTs) additives as lubricants has received considerable interest because of their excellent mechanical and frictional properties. Given their structural differences, both carbon nano-additives are expected to have different synergistic effects...

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Bibliographic Details
Published in:Carbon (New York) 2014-12, Vol.80, p.734-745
Main Authors: Zhang, Lili, Pu, Jibin, Wang, Liping, Xue, Qunji
Format: Article
Language:English
Subjects:
Additives
Carbon
Cross-disciplinary physics: materials science
rheology
Diamond-like carbon films
Exact sciences and technology
Graphene
Ionic liquids
Lubrication
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotubes
Physics
Tribology
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Summary:The use of graphene and multi-walled carbon nanotubes (MWCNTs) additives as lubricants has received considerable interest because of their excellent mechanical and frictional properties. Given their structural differences, both carbon nano-additives are expected to have different synergistic effects at various conditions (from boundary to mixed lubrication). For applications in space, the tribological properties of graphene and MWCNTs additives in diamond-like carbon/ionic liquids hybrid films in different lubricating states at high vacuum were compared. The wear surfaces, transfer films, wear debris, and microstructures of the hybrid films were analyzed via Raman spectroscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. The results showed that MWCNTs and graphene present the different nano-scale tribological mechanisms and produce different lubricating effect on the hybrid films at different lubricating states.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2014.09.022