Macrosuperlubric materials are pivotal for reducing friction and wear in engineering applications. However, current solid superlubricants require intricate fabrication and specific conditions (e.g., vacuum or inert atmospheres), while liquid superlubricants are prone to creep, leakage, and corrosion. Here, a novel semisolid subnanometer nanowire (SNW) superlubrication material based on the shear‐thinning effect is introduced to overcome these challenges. The SNWs achieve an exceptionally low friction coefficient (0.008–0.009) with silicon nitride (Si3N4) and polytetrafluoroethylene (PTFE) tribo‐pairs, demonstrating a brief running‐in period (≈39 s) and stable superlubrication over extended friction (12 h, >120 000 cycles). The combination of the shear‐thinning network structure mechanism, the adsorption membrane mechanism, and hydrodynamic effects provides a synergistic effect, playing a crucial role in achieving superlubricity. Additionally, SNWs can be combined with various base oils to create semisolid gel lubricants with superlubricating properties. This innovative approach addresses the limitations of current superlubrication systems and introduces a new category of semisolid gel lubricants, significantly expanding the applications of superlubrication materials.

中文翻译：

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使用剪切稀化半固体润滑剂实现宏观级超级润滑


宏观超润滑材料对于减少工程应用中的摩擦和磨损至关重要。然而，目前的固体超级润滑剂需要复杂的制造和特定的条件（例如，真空或惰性气氛），而液体超级润滑剂容易发生蠕变、泄漏和腐蚀。在这里，引入了一种基于剪切稀化效应的新型半固体亚纳米纳米线 （SNW） 超级润滑材料来克服这些挑战。SNW 与氮化硅 （Si3N4） 和聚四氟乙烯 （PTFE） 摩擦对一起实现了极低的摩擦系数 （0.008–0.009），表现出短暂的磨合期 （≈39 s） 和在延长摩擦（12 小时，>120 000 次循环）下稳定的过量润滑。剪切稀化网络结构机制、吸附膜机制和流体动力学效应的结合提供了协同效应，在实现超润滑性方面发挥着至关重要的作用。此外，SNW 可以与各种基础油结合使用，以制造具有超强润滑性能的半固体凝胶润滑剂。这种创新方法解决了当前超级润滑系统的局限性，并引入了一种新的半固体凝胶润滑剂，大大扩展了超级润滑材料的应用。