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The problem of the influence of the porous coating saturation with a fluid on the mechanical properties of both the coating and the coating-substrate system as a whole is considered. An important practical application of the problem under consideration is wear-resistant coating of endoprostheses of human large joints. Based on the method of movable cellular automata, a three-dimensional model of the mechanical behavior of a porous fluid-saturated coating on a titanium substrate is constructed. The effect of fluid saturation of the surface layer of a ceramic coating on the mechanical characteristics of the coating-substrate system was numerically studied. The simulation results show that the presence of fluid in a thin surface layer of the coating can have a significant effect on the mechanical response of the entire coating-substrate system at sufficiently high rates of local contact loading. Thus, calculations without taking into account the interstitial fluid lead to an overestimation of the strength and hardness of the materials with coatings in wetting conditions. Scratch simulations show that a fluid-saturated surface layer possesses higher resistant to wear.

About the influence of porous coating fluid saturation on the mechanical behavior of the coating-substrate system under contact loading