期刊论文详细信息
Correlation between stick-slip frictional sliding and charge transfer | |
Article | |
关键词: ATOMISTIC MECHANISMS; CONTACT; ADHESION; DYNAMICS; NANOINDENTATION; TRANSITION; TRIBOLOGY; STRENGTH; BEHAVIOR; MODEL; | |
DOI : 10.1103/PhysRevB.82.075414 | |
来源: SCIE |
【 摘 要 】
A decade ago, Budakian and Putterman [Phys. Rev. Lett. 85, 1000 (2000)] ascribed friction to the formation of bonds arising from contact charging when a gold tip of a surface force apparatus was dragged on polymethylmethacrylate surface. We propose a stick-slip model that captures the observed correlation between stick-slip events and charge transfer, and the lack of dependence of the scale factor connecting the force jumps and charge transfer on normal load. Here, stick-slip dynamics arises as a competition between the viscoelastic and plastic deformation time scales and that due to the pull speed with contact charging playing a minor role. Our model provides an alternate basis for explaining most experimental results without ascribing friction to contact charging.【 授权许可】
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