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Experimental Protocol to Investigate Particle Aerosolization of a Product Under Abrasion and Under Environmental Weathering
Published on: September 16, 2016
Influence of contact aging on nanoparticle friction kinetics
Michael Feldmann1, Dirk Dietzel1, Harald Fuchs2
1Institut für Angewandte Physik, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 15, 35392 Giessen, Germany.
Abstract:
One of the oldest concepts in tribology is stick-slip dynamics, where a disruptive sequence of stick and slip phases determine the overall resistance in sliding friction. While the mechanical energy dissipates in the sudden slip phase, the stick phase has been shown to be characterized by contact strengthening mechanisms, also termed contact aging. We present experiments of sliding nanoparticles, where friction is measured as a function of sliding velocity and interface temperature. The resulting complex interdependence is in good agreement with Monte Carlo simulations, in which the energy barrier for contact breaking increases logarithmically with time, at a rate governed by thermal activation.
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