Abstract
The article presents theoretical and experimental studies of tribosystems operating under conditions of normal and abnormally low friction and wear when changing the external conditions of their operation. A comparative analysis of self-organization mechanisms of tribosystem operating under conditions of normal mechanochemical and abnormally low friction and wear is performed to determine the conditions of transition to such a mode. There was determined another possible way of converting tribosystems to conditions of abnormally low friction and wear by modifying the surface layer of bronze specimens using finishing treatment with the use of a mineral of amphiboles (jade) group.
Highlights
The modern development of tribology and, above all, such a section as tribomateriology[1] has allowed us to formulate a new rather effective way of reducing friction and wear in different tribosystems as a result of tribomodification of the surface layer.[2,3] The purpose of such tribomodification is to create the most favorable conditions of microcontact quasielastic interaction arising at the level of microrelief.[4]Consideration of quasielastic interaction from the position of nonequilibrium thermodynamics allowed the author Veynik[5] to hypothesize that quasielastic interaction can be an antidissipative factor, which leads to the degeneration of accumulated inner energy from tribosystem (TS)
This study shows once again the observance of the first and second laws of thermodynamics when the tribosystem is operated under conditions of abnormally low friction and wear
It is shown that the source of these forces is the wave component of external friction
Summary
The modern development of tribology and, above all, such a section as tribomateriology[1] has allowed us to formulate a new rather effective way of reducing friction and wear in different tribosystems as a result of tribomodification of the surface layer.[2,3] The purpose of such tribomodification is to create the most favorable (compatible, according to Garkunov) conditions of microcontact quasielastic interaction arising at the level of microrelief.[4]Consideration of quasielastic interaction from the position of nonequilibrium thermodynamics allowed the author Veynik[5] to hypothesize that quasielastic interaction can be an antidissipative factor, which leads to the degeneration of accumulated inner energy from tribosystem (TS). Another way to achieve abnormally low friction and wear, more effective from our point of view, is through tribomodification of the surface layer as a result of heat flow control,[21] programmable load,[31,32] or special finishing treatment.[31,32] In this case, the tribosystem is a moving element – a quasi-rigid body, whilst on a stationary surface the layer is formed with a certain gradient of physical and mechanical properties, close to Shvedov’s model.[31,32] Since as a result of the contact interaction of perfectly elastic micro-ledges a stress wave is formed, which participates in the process of energy dissipation which is supplied from the outside, the total friction force will decrease by the value of this wave component Fw.[22]
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