Phenomenological theory for the melting of a thin lubricant film between two atomically smooth solid surfaces |
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Authors: | I A Lyashenko A V Khomenko and L S Metlov |
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Institution: | 1.Sumy State University,Sumy,Ukraine;2.Galkin Physicotechnical Institute,National Academy of Sciences of Ukraine,Donetsk,Ukraine |
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Abstract: | A thermodynamic model is developed for the melting of an ultrathin lubricant film squeezed between two atomically smooth solid
surfaces. To describe the state of lubricant, an excess volume parameter is introduced; it appears due to the chaos in the
structure of a solid body induced by melting. This parameter increases with the total internal energy upon melting. Thermodynamic
melting and shear melting are described. The dependences of the friction force on the lubricant temperature and the shear
rate of friction surfaces are analyzed. The calculated results are compared to the experimental data. |
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