Friction ( IF 6.3 ) Pub Date : 2024-05-23 , DOI: 10.1007/s40544-024-0901-8 Kewei Tang , Weihong Qi , Guoliang Ru , Weimin Liu
Two-dimensional materials are excellent lubricants with inherent advantages. However, superlubricity has been reported for only a few of these materials. Unfortunately, other promising two-dimentional (2D) materials with different physical properties cannot be discovered or applied in production; thus, energy consumption can be greatly reduced. Here, we carry out high-throughput calculations for 1,475 2D materials and screen for low-friction materials. To set a standard, we propose, for the first time, a geometry-independent lubricating figure of merit based on the conditions for stick-slip transition and our theory of Moiré friction. For the efficient calculation of this figure of merit, an innovative approach was developed based on an improved registry index model. Through calculations, 340 materials were found to have a figure of merit lower than 10−3. Eventually, a small set of 21 materials with a figure of merit lower than 10−4 were screened out. These materials can provide diverse choices for various applications. In addition, the efficient computational approach demonstrated in this work can be used to study other stacking-dependent properties.
中文翻译:
使用润滑品质因数从高通量计算中筛选低摩擦二维材料
二维材料是优良的润滑剂,具有先天的优势。然而,据报道,这些材料中只有少数具有超润滑性。不幸的是,其他具有不同物理性质的有前途的二维(2D)材料无法被发现或应用于生产;因此,可以大大降低能源消耗。在这里,我们对 1,475 种二维材料进行了高通量计算,并对低摩擦材料进行了筛选。为了设定标准,我们首次提出了基于粘滑过渡条件和莫尔摩擦理论的与几何形状无关的润滑品质因数。为了有效计算该品质因数,基于改进的注册索引模型开发了一种创新方法。通过计算,发现340种材料的品质因数低于10 −3 。最终,筛选出了一小部分品质因数低于10 −4 的21种材料。这些材料可以为各种应用提供多样化的选择。此外,这项工作中演示的高效计算方法可用于研究其他与堆叠相关的属性。