title: Real-time transmission electron microscope observation of nanofriction at a single Ag asperity.
abstract: The observation of nanoscale deformation in real time is a significant step toward understanding the mechanisms of friction and lubrication. Our experimental setup of a micromachine combined with a transmission electron microscope allowed us to measure the deformation, force and cross-sectional area of a single Ag asperity during shear testing. The experimental results provided insight into one of the parameters that determines the frictional coefficient. Furthermore, we demonstrated that the energy loss associated with a shear fracture event is strongly correlated with the increase in total surface energy of the two surfaces formed here after the fracture of the nanocontact.
authors.affiliation: Institute of Industrial Science, University of Tokyo, Tokyo 153-8505, Japan. takaakis@iis.u-tokyo.ac.jp
authors.forename: Takaaki
authors.initials: T
authors.lastname: Sato
authors.forename: Tadashi
authors.initials: T
authors.lastname: Ishida
authors.forename: Laurent
authors.initials: L
authors.lastname: Jalabert
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Fujita