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Temperature dependence effect of viscosity on ultrathin lubricant film melting

Temperature dependence effect of viscosity on ultrathin lubricant film melting

We study the melting of an ultrathin lubricant film under friction between atomically flat surfaces at temperature dependencies of viscosity described by Vogel-Fulcher relationship and by power expression, which are observed experimentally. It is shown that the critical temperature exists in both...

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Main Authors: Khomenko, A.V., Lyashenko, I.A.
Format: Article
Language:English
Published: Інститут фізики конденсованих систем НАН України 2006
Series:Condensed Matter Physics
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/121447
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spelling irk-123456789-1214472017-06-15T03:03:41Z Temperature dependence effect of viscosity on ultrathin lubricant film melting Khomenko, A.V. Lyashenko, I.A. We study the melting of an ultrathin lubricant film under friction between atomically flat surfaces at temperature dependencies of viscosity described by Vogel-Fulcher relationship and by power expression, which are observed experimentally. It is shown that the critical temperature exists in both cases the exceeding of which leads to the melting of lubricant and, as a result, the sliding mode of friction sets in. The values of characteristic parameters of lubricant are defined, which are needed for friction reduction. In the systems, where the Vogel-Fulcher dependence is fulfilled, it is possible to choose the parameters at which the melting of lubricant takes place even at zero temperature of friction surfaces. The deformational defect of the shear modulus is taken into account in describing the lubricant melting according to the mechanism of the first-order transition. Дослiджується плавлення ультратонкої плiвки мастила в процесi тертя мiж атомарно-плоскими поверхнями при температурних залежностях в’язкостi, якi описуються спiввiдношенням Фогеля-Фулчера i степепеневим виразом, що спостерiгаються експериментально. Показано, що в обох випадках iснує критична температура, при перевищеннi якої вiдбувається плавлення плiвки мастила, i як наслiдок встановлюється рiдинний режим тертя. Визначенi значення характерних параметрiв мастила, необхiднi для зменшення тертя. У системах, де виконується залежнiсть Фогеля-Фулчера, можливо пiдiбрати такi параметри, при яких плавлення мастила вiдбувається навiть при нульовiй температурi поверхонь тертя. Для опису процесу плавлення мастила за механiзмом переходу першого роду проведено врахування деформацiйного дефекту модуля зсуву. 2006 Article Temperature dependence effect of viscosity on ultrathin lubricant film melting / A.V. Khomenko, I.A. Lyashenko // Condensed Matter Physics. — 2006. — Т. 9, № 4(48). — С. 695–702. — Бібліогр.: 21 назв. — англ. 1607-324X PACS: 64.60.-i, 62.20.Fe, 62.20.Qp, 68.60.-p DOI:10.5488/CMP.9.4.695 http://dspace.nbuv.gov.ua/handle/123456789/121447 en Condensed Matter Physics Інститут фізики конденсованих систем НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description We study the melting of an ultrathin lubricant film under friction between atomically flat surfaces at temperature dependencies of viscosity described by Vogel-Fulcher relationship and by power expression, which are observed experimentally. It is shown that the critical temperature exists in both cases the exceeding of which leads to the melting of lubricant and, as a result, the sliding mode of friction sets in. The values of characteristic parameters of lubricant are defined, which are needed for friction reduction. In the systems, where the Vogel-Fulcher dependence is fulfilled, it is possible to choose the parameters at which the melting of lubricant takes place even at zero temperature of friction surfaces. The deformational defect of the shear modulus is taken into account in describing the lubricant melting according to the mechanism of the first-order transition.
format Article
author Khomenko, A.V.
Lyashenko, I.A.
spellingShingle Khomenko, A.V.
Lyashenko, I.A.
Temperature dependence effect of viscosity on ultrathin lubricant film melting
Condensed Matter Physics
author_facet Khomenko, A.V.
Lyashenko, I.A.
author_sort Khomenko, A.V.
title Temperature dependence effect of viscosity on ultrathin lubricant film melting
title_short Temperature dependence effect of viscosity on ultrathin lubricant film melting
title_full Temperature dependence effect of viscosity on ultrathin lubricant film melting
title_fullStr Temperature dependence effect of viscosity on ultrathin lubricant film melting
title_full_unstemmed Temperature dependence effect of viscosity on ultrathin lubricant film melting
title_sort temperature dependence effect of viscosity on ultrathin lubricant film melting
publisher Інститут фізики конденсованих систем НАН України
publishDate 2006
url http://dspace.nbuv.gov.ua/handle/123456789/121447
citation_txt Temperature dependence effect of viscosity on ultrathin lubricant film melting / A.V. Khomenko, I.A. Lyashenko // Condensed Matter Physics. — 2006. — Т. 9, № 4(48). — С. 695–702. — Бібліогр.: 21 назв. — англ.
series Condensed Matter Physics
work_keys_str_mv AT khomenkoav temperaturedependenceeffectofviscosityonultrathinlubricantfilmmelting
AT lyashenkoia temperaturedependenceeffectofviscosityonultrathinlubricantfilmmelting
first_indexed 2023-10-18T20:39:28Z
last_indexed 2023-10-18T20:39:28Z
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