Orientation ordering of boundary layers and lubricity of oils

Buyanovskii, I. A.; Ignatyeva, Z. V.; Levchenko, Vladimir; Matveenko, V. N.

doi:10.3103/s1068366608040077

Cited by 13 publications

(7 citation statements)

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“…In the first case, an oriented film at the inter face with the solid is totally absent; in the second case, there exists a highly ordered homeotropically ori ented boundary film, which, according to current views, imparts high antifriction and antiwear properties to the lubricating film [8].…”

Section: Discussionmentioning

confidence: 95%

“…Amorphous diamond like car bon films with an amorphous structure were produced using the pulsed condensation of carbon plasma (ρ = 10 13 cm -3 , the degree of ionization was 95%) at τ = 400 μs and ν = 1-3 Hz. Single crystal carbon films 3 μm thick were produced using the pulsed condensation of carbon plasma in combination with additional irradiation by Ar + ions [4,8,9]. According to the Auger spectroscopy data, the films consist 99% of carbon.…”

Section: Discussionmentioning

confidence: 99%

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Hard carbon coatings and boundary lubrication of steel parts

Drozdov

Buyanovskii

Levchenko

et al. 2014

J. Mach. Manuf. Reliab.

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It is shown that the composition and structure of diamond like carbon coatings deposited on friction surfaces of steel parts of lubricated friction units have a substantial effect on the degree of the orientation of molecules of a lubricant in a boundary film and, therefore, on the antifriction behav ior of the lubricant under boundary lubrication conditions. We present the results of research carried out in recent years at the Department of Friction, Wear, and Lubrication of the Blagonravov Institute of Machine Science of the Russian Academy of Sciences in collaboration with the Chemical Faculty of the Lomonosov Moscow State University and the 25th State Research Institute of the Ministry of Defense of the Russian Federation in order to enhance the lubricity of oils, as well as to simplify and cheapen their compositions, which is of great importance from the viewpoint of ecology.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Hard carbon coatings and boundary lubrication of steel parts

Drozdov

Buyanovskii

Levchenko

et al. 2014

J. Mach. Manuf. Reliab.

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“…In the model of hard cut layer with structurally active particles [7] the viscosity of the structured ELC layer is considered to be infinitely high, and the liquid with bulk viscosity moves between the two discs in the gap with the thickness (3) In this approximation, we have previously obtained the following expression for the rate field in the gap between the optical windows [9]:…”

Section: ( )mentioning

confidence: 99%

“…However the spatial structure of a lubricating layer is determined not only by hydro dynamics. It is noted in [3] that the lubricating effect of the adsorption layers is determined primarily by the orientation of the lubricant molecules with respect to the friction surfaces. Thus, we should conclude that both the surface and shear flow play a decisive role in the structural ordering of the lubricant in different modes of lubrication [4].…”

Section: Introductionmentioning

confidence: 99%

An in situ study of lubricant layer morphology

Zheleznov

Березина

Godlevsky³

2015

J. Frict. Wear

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For the ordered phases of the mesomorphous lubricant layer to be identified, a quantitative method based on the models of epitropic liquid crystal layers for an infinitely high and finite constant viscosity has been developed. A polarizing tribometer was used for the experimental verification of the theoretical results. The experimental approach is based on the measurement of plane polarized laser light transmitted through the lubricating layer under the steady state shear flow conditions.

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“…The impact of such interaction on the lubrication effect must be the higher the more adsorptionally active and less uneven the tribocontact surfaces are. The authors of work [3] emphasize that the lubrication activity of layers of adsorptional origin is mainly influenced by the orientation degree of molecules of lubrication compositions active components close to friction surfaces. The analysis of the given facts allows to conclude that the determining role in different lubrication modes can belong both to hydrodynamic conditions of the shear flow and orientation order of lubrication layers in surface forces field [4].…”

Section: Introductionmentioning

confidence: 99%