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Title | Multidimensional thermodynamic potential for descriptions of ultrathin lubricant film melting between two atomically smooth surfaces |
Authors |
Khomenko, Oleksii Vitaliiovych
![]() Liashenko, Yakiv Oleksandrovych ![]() Metlov, L.S. |
ORCID |
http://orcid.org/0000-0001-8755-9592 http://orcid.org/0000-0001-7511-3163 |
Keywords |
boundary friction nanotribology dynamic modeling shear stress and strain viscoelastic medium stick-slip mode |
Type | Article |
Date of Issue | 2011 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/18068 |
Publisher | Condensed Matter Physics |
License | Copyright not evaluated |
Citation | L.S. Metlov, A.V. Khomenko, I.A. Lyashenko, Multidimensional thermodynamic potential for descriptions of ultrathin lubricant film melting between two atomically smooth surfaces // Condensed Matter Physics. - 2011. - Vol.14, No.1. - P.1-11. |
Abstract |
The thermodynamic model of ultrathin lubricant film melting, confined between
two atomically-flat solid surfaces, is built using the Landau phase transition
approach. Non-equilibrium entropy is introduced describing the part of thermal
motion conditioned by non-equilibrium and non-homogeneous character of the
thermal distribution. The equilibrium entropy changes during time due to
transition of non-equilibrium entropy to the equilibrium subsystem. For the
description of a melting condition the variable of the excess volume
(disorder parameter) is introduced which arises due to chaotization of a
solid structure in the course of melting. The thermodynamic and shear melting is
described consistently. The stick-slip mode of melting, which is observed in experiments, is described.
It is shown that with growth
of shear velocity the frequency of stiction spikes in the irregular mode
increases at first, then it decreases, and the sliding mode comes further
characterized by the constant value of friction force. Comparison of the
obtained results with experimental data is carried out.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/18068 |
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