arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.10192cond-mat.soft
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界面粘附对最小磨粒尺寸和粗糙度演变的作用

The role of interfacial adhesion on minimum wear particle size and roughness evolution

Enrico Milanese, Tobias Brink, Ramin Aghababaei, Jean-François Molinari

摘要:

两个物体之间的粘附力是磨损过程中的一个关键参数。在宏观尺度上,已知强粘合剂结合导致高磨损率,如在清洁的金属对金属接触中观察到的。因此,需要降低界面粘合强度,为此目的采用润滑和表面钝化等技术。尽管如此,很少有人知道的影响粘附磨损的微观过程。特别是,磨损颗粒尺寸和表面粗糙度的演变上的界面粘附的影响是不清楚的,因此在这里解决的分子动力学模拟的装置。我们表明,在短时间尺度下,表面形态,而不是界面粘附强度决定了磨损颗粒的最小尺寸。然而,在较长的时间尺度上,粘附改变了颗粒运动,从而改变了磨损率和表面形态。

英文摘要:

Adhesion between two bodies is a key parameter in wear processes. At the macroscale, strong adhesive bonds are known to lead to high wear rates, as observed in clean metal-on-metal contact. Reducing the strength of the interfacial adhesion is then desirable, and techniques such as lubrication and surface passivation are employed to this end. Still, little is known about the influence of adhesion on the microscopic processes of wear. In particular, the effects of interfacial adhesion on the wear particle size and on the surface roughness evolution are not clear, and are therefore addressed here by means of molecular dynamics simulations. We show that, at short timescales, the surface morphology and not the interfacial adhesion strength dictates the minimum size of wear particles. However, at longer timescales, adhesion alters the particle motion and thus the wear rate and the surface morphology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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