论文标题
在非润滑磨损下二氧化硅上的粗糙度的创造和变化
Creation and evolution of roughness on silica under unlubricated wear
论文作者
论文摘要
摩擦和磨损是所有具有活动部件的设备中都发生的重要现象。尽管它们的起源和随着时间的流逝的发展方式尚未完全了解，但它们都与表面粗糙度密切相关。在固定盘实验的指导下，我们介绍了二氧化硅表面粗糙度形成的步骤，首先是通过创建大致的球形磨损颗粒的大小与临界长度相关的大小相关，该颗粒的限制尺度是延性型和脆性行为之间的过渡，然后是将这些小颗粒积累到较大的第三体层中，或者。我们表明，对于探索的负载条件范围，无论初始表面粗糙度如何，表面粗糙度在非润滑磨损下朝着共同的稳态演变，这暗示了磨损组件的粗糙度演变的可能可预测性。摩擦系数被证明与表面粗糙度有关，并且也讨论了其时间的演变。
Friction and wear are important phenomena occurring in all devices with moving parts. While their origin and the way they evolve over time are not fully understood, they are both intimately linked to surface roughness. Guided by pin-on-disc experiments, we present the steps giving rise to the formation of surface roughness on silica, first by the creation of roughly spherical wear particles whose size is related to a critical length scale governing the transition between ductile and brittle behavior, then by the accumulation of these small particles into a larger third body layer, or gouge. We show that, for the explored range of loading conditions, the surface roughness evolves toward a common steady state under unlubricated wear regardless of the initial surface roughness, hinting toward the possible predictability of roughness evolution in wearing components. The friction coefficient is shown to be related to the surface roughness and its time evolution is discussed as well.
