Research on thin film lubrication: state of the art

Compressibility of Thin Film Lubricants Characterized Using Atomistic Simulation

“…It is now well established both experimentally and theoretically that, as its thickness approaches molecular scales, both a lubricant's static and dynamic properties can be expected to undergo dramatic changes. These changes are often counter-intuitive, not predicted by traditional models, and become more significant the thinner the lubricating film [1,2,3].…”

Transition from elastohydrodynamic to mixed lubrication in highly loaded squeeze contacts

“…We also note that for nanometer-sized average interfacial separation the effect of surface forces, e.g. van der Waals and solvation forces, is no longer negligible if compared to the fluid viscous action (Zhang, 2005), and must be evaluated for quantitative predictions. Indeed these surface forces are strongly responsible for the squeeze-out dynamics, the so called dewetting transition (Carbone and Persson, 2004;Persson et al, 2003), and consequently for the friction and wear local properties (Persson, 2000).…”

“…(1), with a height-dependent correction factor f m ðhÞ ¼ m eff =m (Zhang, 2005), and by properly estimating the (average) van der Waals forces p vdW and solvation forces p solv acting on the lubricant film, which must be included in the local equilibrium relation to give p 0 =p f +p vdW + p solv + p c (Zhang, 2005). Nevertheless, for the roughness values adopted in this work (not smaller than 0:1 mm), these effects would have been negligible if compared to the viscous action.…”

Analysis on mechanism of thin film lubrication

“…With the help of these methods, profound experiments were carried out to investigate the specific features of TFL, some comprehensive references were summarized by the first author [8] . With the help of these methods, profound experiments were carried out to investigate the specific features of TFL, some comprehensive references were summarized by the first author [8] .…”