Particle transfer in the dry friction process

From the first law of thermodynamics, conclusions can be drawn regarding the conditions for negative wear, i.e., friction deposition. In engineering, it can be applied in the process of regenerating friction nodes, thereby minimizing wear. The basis in this case is the phenomenon of material transfer between friction surfaces and the phenomenon of friction deposition, occurring under specific thermodynamic conditions. It is necessary to consider when and why multiple material transfers between elements of friction pairs are observed prior to a finished particle leaving the friction zone.The principle of oxidative wear of metals assumes the cyclic removal of oxide layers as a result of them reaching critical thicknesses corresponding to current friction conditions. The resulting contact of metallic bodies can cause the transfer of particles both from a softer body to a harder one (which corresponds to adhesive transfer) and from a harder one to a softer one. Numerous studies on particle transfer during friction point to such a possibility. (…)

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