Achieving superlow friction with hydrogenated amorphous carbon: some key requirements

Fontaine, Julien; Mogne, Th. Le; Loubet, Jean‐Luc; Belin, M.

doi:10.1016/j.tsf.2004.11.126

Cited by 162 publications

(124 citation statements)

References 29 publications

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“…The tribochemical interactions that control the friction of hydrogenated coatings against a steel counterface were examined by Fontaine et al [19,32] by varying the partial pressure of hydrogen in a vacuum. The coefficient of friction was shown to be initially low (in the range 0.001-0.005) independent of the hydrogen partial pressure, but it increased suddenly to a coefficient of friction of 0.3 after some time.…”

Section: The Effects Of Hydrogenmentioning

confidence: 99%

The friction of diamond-like carbon coatings in a water environment

et al. 2013

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Diamond-like carbon (DLC) coatings are known to provide beneficial mechanical and tribological properties in harsh environments. Their combination of high wear resistance and low friction has led to their extensive use in any number of industries. The tribological performance of a DLC coating is varied however, and the frictional response is known to be strongly dependent on the surrounding environment, as well as the material composition and bonding structure of the DLC coating. This paper presents an up-to-date review on the friction of DLC coatings in a water environment, with a special focus on transfer layer formation and tribochemistry.

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Section: The Effects Of Hydrogenmentioning

confidence: 99%

The friction of diamond-like carbon coatings in a water environment

et al. 2013

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“…This effect is explained more in Appendix E. Low hydrogenated coatings (< 34 at % hydrogen) may exhibit a similar superlow friction level by introducing a significant pressure of hydrogen in the friction environment. The preservation of superlow friction of a-C:H was investigated under different hydrogen pressures [31]. At low hydrogen pressure (50 Pa) similar behavior effects were observed as in vacuum, meaning strong adhesion between counter surfaces leading to a local loss of transfer layer.…”

Section: Environmental Effects On the Frictionmentioning

confidence: 74%

“…It has been concluded that the network relaxation permits weaker interaction between asperities on the sliding surfaces. The friction reduction is correlated with the measured viscoplastic properties [31]. By comparison, the highest achievable H/E ratio for tool steel is about 0.02.…”

Section: Mechanical Propertiesmentioning

confidence: 88%

On the design of lubricant free piston compressors

Owczarek¹

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“…Hence, to achieve superlow friction, it is necessary to control the composition of the sliding surfaces and the rheology of the transfer film. Both high hydrogen content of the pristine a-C:H film and feeding the a-C:H or transfer film surface with hydrogen are sufficient to avoid adhesive interactions and to modify the interfacial material, and can also induce a "healing" effect on damaged surfaces [40,41]. When DLC films are used as protective coatings for space applications, they have to overcome widely fluctuating temperatures.…”

Section: Diamond-like Carbon Filmsmentioning

confidence: 99%

Carbon-based solid-liquid lubricating coatings for space applications-A review

2015

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Despite continuous improvements in machine elements over the past few decades, lubrication issues have impeded human exploration of the universe because single solid or liquid lubrication systems have been unable to satisfy the ever-increasing performance requirements of space tribology. In this study, we present an overview of the development of carbon-based films as protective coatings, with reference to their high hardness, low friction, and chemical inertness, and with a particular focus on diamond-like carbon (DLC) films. We also discuss the design of carbon-based solid-liquid synergy lubricating coatings with regards to their physicochemical properties and tribological performance. Solid-liquid composite coatings are fabricated via spinning liquid lubricants on solid lubricating films. Such duplex lubricating coatings are considered the most ideal lubrication choice for moving mechanical systems in space as they can overcome the drawback of adhesion and cold-welding associated with solid films under harsh space conditions and can minimize the crosslinking or chain scission of liquid lubricants under space irradiation. State of the art carbon-based solid-liquid synergy lubricating systems therefore holds great promise for space applications due to solid/liquid synergies resulting in superior qualities including excellent friction reduction and anti-wear properties as well as strong anti-irradiation capacities, thereby meeting the requirements of high reliability, high precision, high efficiency, and long lifetime for space drive mechanisms.

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Achieving superlow friction with hydrogenated amorphous carbon: some key requirements

Cited by 162 publications

References 29 publications

The friction of diamond-like carbon coatings in a water environment

The friction of diamond-like carbon coatings in a water environment

On the design of lubricant free piston compressors

Carbon-based solid-liquid lubricating coatings for space applications-A review

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