Combined Effects of Structural Transformation and Hydrogen Passivation on the Frictional Behaviors of Hydrogenated Amorphous Carbon Films

@article{Chen2015CombinedEO,
  title={Combined Effects of Structural Transformation and Hydrogen Passivation on the Frictional Behaviors of Hydrogenated Amorphous Carbon Films},
  author={Yi-nan Chen and Tianbao Ma and Zhe Chen and Yuan-zhong Hu and Hui Wang},
  journal={Journal of Physical Chemistry C},
  year={2015},
  volume={119},
  pages={16148-16155}
}
Tribological behaviors of hydrogenated amorphous carbon (a-C:H) films under single asperity contact are investigated by molecular dynamics (MD) simulations. Hydrogen concentration and normal load are found to play essential roles in the frictional behavior of a-C:H films. With low hydrogen concentration, the a-C:H film shows high adhesion and friction even at very low normal loads (1.75 nN). The sp3-to-sp2 rehybridization is observed in the a-C:H films with all studied hydrogen concentrations… Expand
Atomistic understanding on friction behavior of amorphous carbon films induced by surface hydrogenated modification
Abstract Friction behavior of self-mated amorphous carbon (a-C) films with hydrogenated surface were investigated by reactive molecular dynamics simulation. Results revealed that compared to theExpand
The effect of microstructure on the tribological properties of a-C:H films
Abstract The tribological properties of a-C:H films were investigated from a microstructural point of view. The microstructures of a-C:H films (i.e., diamond-like, polymer-like, and graphite-likeExpand
Effect of environmental hydrogen atoms on the tribological behaviors of diamond-like carbon films
Abstract Influence of environmental H atoms on the tribological behaviors of DLC films is investigated via molecular dynamics simulations. These H atoms significantly reduce the friction force, andExpand
Lubrication Performance of Hydrogenated Graphene on Diamond-Like Carbon Films Based on Molecular Dynamics Simulation
Graphene is a good candidate for solid lubricants due to its unique atomic structure. Its lubrication properties are sensitive to chemical modifications such as hydrogenations. Here, an investigationExpand
Tribo‐Induced Structural Transformation and Lubricant Dissociation at Amorphous Carbon–Alpha Olefin Interface
Amorphous carbon (a-C) combined with a fluid lubricant is capable of providing an ultra-low friction state and thus achieving long lifetime and reliable operation. However, the understanding of theExpand
Role of unsaturated hydrocarbon lubricant on the friction behavior of amorphous carbon films from reactive molecular dynamics study
Abstract Compositing amorphous carbon (a-C) film with fluid lubricant could successfully improve the friction properties and prolong the service life and reliability of protected components. However,Expand
Origin of low friction for amorphous carbon films with different hydrogen content in nitrogen atmosphere
Abstract To date, hydrogenated amorphous carbon(a-C:H) film is a promising solid lubricant to meet growing needs for energy-saving and environmentally friendly. Here, friction behaviors of four a-C:HExpand
Shear-Induced Structural Changes and Origin of Ultralow Friction of Hydrogenated Diamond-like Carbon (DLC) in Dry Environment.
TLDR
A comprehensive model was proposed for the formation and structure of the ultralow friction sliding contact of H-DLC as well as ex situ analyses of transmission electron microscopy, Raman spectroscopy, and nanoindentation. Expand
Towards superlubricity in nanostructured surfaces: the role of van der Waals forces.
TLDR
The structural ultra-low friction (superlubricity) is attributed to a lower polarizability at the outermost nanostructured layer of a-C:H thin films due to a higher hydrogen density, which renders weaker van der Waals forces, in particular London dispersion forces. Expand
A molecular dynamics study of the oxidation mechanism, nanostructure evolution, and friction characteristics of ultrathin amorphous carbon films in vacuum and oxygen atmosphere
TLDR
The present study provides insight into the oxidation mechanism and friction behavior of ultrathin a-C films and introduces a computational framework for performing oxidation/tribo-oxidation MD simulations that can guide experimental investigations. Expand
...
1
2
3
4
...

References

SHOWING 1-10 OF 27 REFERENCES
Atomistic Insights into the Running-in, Lubrication, and Failure of Hydrogenated Diamond-Like Carbon Coatings
The tribological performance of hydrogenated diamond-like carbon (DLC) coatings is studied by molecular dynamics simulations employing a screened reactive bond-order potential that has been adjustedExpand
Understanding the ultra-low friction behavior of hydrogenated fullerene-like carbon films grown with different flow rates of hydrogen gas
Fullerene-like hydrogenated carbon (FL-C:H) films that exhibit ultra-low friction and wear in humid conditions have been the subject of extensive researches, but the structure–performanceExpand
Tribochemical Reaction Dynamics Simulation of Hydrogen on a Diamond-like Carbon Surface Based on Tight-Binding Quantum Chemical Molecular Dynamics
Diamond-like carbon (DLC) has recently attracted much attention as a solid-state lubricant, because of its resistance to wear, low friction, and low abrasion. Several factors, such as the hydrogenExpand
Effects of Adhesion and Transfer Film Formation on the Tribology of Self-Mated DLC Contacts†
Diamond and diamondlike carbon (DLC) films exhibit a wide range of sometimes contradictory tribological behavior. Experimentally, isolating the influences of factors such as film structure, testingExpand
The role of hydrogen in tribological properties of diamond-like carbon films☆
Abstract Extensive research on diamond and diamondlike carbon (DLC) films in our laboratory has further confirmed that hydrogen plays an important role in the tribological properties of these films.Expand
Super-low friction and super-elastic hydrogenated carbon films originated from a unique fullerene-like nanostructure.
TLDR
The fabricated fullerene-like hydrogenated carbon films (FL-C:H) possess superior mechanical properties, i.e. high hardness (19 GPa) and high elasticity (elastic recovery of 85%). Expand
Growth mechanism of hydrogenated amorphous carbon films: Molecular dynamics simulations
Abstract The microstructure and growth mechanism of hydrogenated amorphous carbon films, deposited from different hydrocarbon sources and at various incident energies, are investigated by molecularExpand
Surface passivation and boundary lubrication of self-mated tetrahedral amorphous carbon asperities under extreme tribological conditions
Tetrahedral amorphous carbon coatings have the potential to significantly reduce friction and wear between sliding components. Here, we provide atomistic insights into the evolution of the slidingExpand
Differentiating the tribological performance of hydrogenated and hydrogen-free DLC coatings
Diamond-like carbon (DLC) coatings cover a wide range of different types of carbon-based coatings, which generally have properties such as low friction and high wear resistance. DLC films can beExpand
Perspectives of friction mechanism of a-C:H film in vacuum concerning the onion-like carbon transformation at the sliding interface
A-C:H films with low friction and good wear resistance have long been regarded as a potential space lubricating film. However, its superlubricity mechanism and failure process in vacuum still remainsExpand
...
1
2
3
...