The influence of the fluid saturation of a porous coating on the mechanical properties of the coating and the entire coating-substrate system is addressed. An important practical application is targeted as the wear-resistant coatings of endoprostheses of major human joints. Based on the method of movable cellular automata, a 3D-model of the mechanical behavior of a porous fluid-saturated coating on a titanium substrate is constructed. Using this model, the influence of fluid-saturation of the surface-layer of a ceramic coating on the mechanical characteristics of the coating-substrate system is studied numerically. The simulation results demonstrate that the presence of fluid in a thin surface layer of the coating can strongly affect the mechanical response of the entire coating-substrate system under sufficiently high rates of the local contact loading. In particular, the calculations without taking the fluid into account give overestimated values of strength and hardness of the coated materials under the wetting conditions. A simulation of scratching demonstrates that the material with a fluid-saturated surface layer is more stable to wear.

中文翻译：

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接触载荷下流体饱和度对涂层-基材系统机械性能的影响

解决了多孔涂层的流体饱和度对涂层和整个涂层 - 基材系统的机械性能的影响。一个重要的实际应用是作为主要人体关节的内置假体的耐磨涂层。基于可移动元胞自动机的方法，构建了钛基底上多孔流体饱和涂层的机械行为的 3D 模型。使用该模型，数值研究了陶瓷涂层表面层的流体饱和度对涂层-基材系统机械特性的影响。模拟结果表明，在足够高的局部接触载荷率下，涂层薄表面层中流体的存在会强烈影响整个涂层 - 基材系统的机械响应。特别是，不考虑流体的计算给出了在润湿条件下涂层材料的强度和硬度的高估值。划痕模拟表明具有流体饱和表面层的材料更耐磨。