Suspended silt particles in natural water inevitably enter open water hydraulic systems, challenging the tribological performance of materials and complicating the selection of appropriate system filtration precision. This study aims to investigate the tribological performance of textured surfaces and the mechanisms of particle contamination resistance under different filtration precisions. Purified water was used as a control, while silt water with an initial mass concentration of 1 % was filtered through 100 μm, 40 μm, and 10 μm filters as experimental groups. The friction and wear performance of HVOF-sprayed WC-9Co-5Cr-1Ni coatings, both textured and untextured, paired with untextured Si3N4, was evaluated under these lubrication conditions. Results showed that texturing reduced the friction coefficients significantly. In silt-laden environments, textures not only stored particles but also facilitated their fragmentation or layered delamination through interactions with texture edges. Compared to untextured surfaces, textured surfaces reduced the filtration precision requirement from 10 μm to 40 μm without significant material damage and facilitated lubricating film formation in silt-laden environments. These findings may provide guidance for texture design in tribopairs and filtration strategies in silt-contaminated hydraulic systems.

中文翻译：

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不同过滤精度下含淤泥水的纹理WC涂层的摩擦学性能


天然水中悬浮的淤泥颗粒不可避免地会进入开放水域液压系统，这对材料的摩擦学性能提出了挑战，并使选择合适的系统过滤精度变得复杂。本研究旨在研究不同过滤精度下纹理表面的摩擦学性能以及抗颗粒污染的机制。使用纯净水作为对照，而初始质量浓度为 1 % 的淤泥水作为实验组通过 100 μm、40 μm 和 10 μm 过滤器过滤。在这些润滑条件下，评估了 HVOF 喷涂的 WC-9Co-5Cr-1Ni 涂层（有纹理和无纹理）与无纹理 Si3N4 配对的摩擦和磨损性能。结果表明，纹理处理显著降低了摩擦系数。在充满淤泥的环境中，纹理不仅存储了颗粒，还通过与纹理边缘的交互促进了它们的碎片化或分层分层。与无纹理表面相比，有纹理表面将过滤精度要求从 10 μm 降低到 40 μm，而不会对材料造成重大损坏，并有助于在充满淤泥的环境中形成润滑膜。这些发现可能为摩擦对的纹理设计和淤泥污染液压系统中的过滤策略提供指导。