Abstract
The results of researching the characteristics of friction and wear of the developed self-lubricating nanocomposite coatings containing MgC2, are presented. Due to the interrelation of thermal and mechanical fluctuations, magnesium carbide thermally decomposes and forms structurally free α-graphite. The specified graphite creates a surface antifriction layer, which minimizes the contact parameters. The composition and structure of self-lubricating coatings are proposed, which showed high wear-resistant properties in the entire load-speed range, simulating the operation of the friction unit in field operating condition. It is shown that the means of controlling wear and ensuring high performance is the presence of both a thin film layer of graphite and the formation of fine secondary structures. All this provides the modification of the friction surface and protects unacceptable plastic deformation processes.
Highlights
Friction is associated with one of the most pressing problems of modern technology – the wear of machinery
Summarizing the above, it can be noted that the development of powder compositions for detonation spraying of antifriction self-lubricating nanostructured coatings for operation in extreme conditions is one of the priority areas of modern tribotechnical materials science and an important task of extending the service life of machine parts
The aim of the work is to study, within the framework of the phenomenological approach, the wear resistance of detonation nanostructured composite self-lubricating coatings and to establish the effect of carbide graphite, which is formed under increased loads under thermodynamic effects, on their surface properties
Summary
Friction is associated with one of the most pressing problems of modern technology – the wear of machinery. There are positive results in achieving the quality of antifriction materials through the use of solid lubricants, but theoretical and applied problems of friction, wear and lubrication of machines remain the most complex scientific and technical problems that have to be solved when operating modern equipment. Summarizing the above, it can be noted that the development of powder compositions for detonation spraying of antifriction self-lubricating nanostructured coatings for operation in extreme conditions is one of the priority areas of modern tribotechnical materials science and an important task of extending the service life of machine parts. The aim of the work is to study, within the framework of the phenomenological approach, the wear resistance of detonation nanostructured composite self-lubricating coatings and to establish the effect of carbide graphite, which is formed under increased loads under thermodynamic effects, on their surface properties
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