Abstract
The article presents the results of joint application of modern experimental and theoretical methods to analyze interatomic interactions on friction surfaces and in subsurface layers. The wear resistance of the wheel-rail system is shown to experience the effect of grain-boundary segregation, and the methods of suppressing its negative consequences are discussed. Adsorption on the iron surface of heteropolyphosphates of alkali metals, representing a new type of additive to lubricants, is studied.
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