Wear resistance of self-lubricating coatings due to the formation of carbide graphite





friction, wear, secondary structures, anti-friction layer


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.


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