Controlling energy dissipation due to friction is a cornerstone on the way to further advance the energy efficiency of mechanical processes and to reduce emissions. This requires to identify the relevant physical processes on length scales from macroscopic to nanoscopic dimensions. A fundamental understanding of the frictional processes, resulting in the synthesis of reduced-friction materials would thus have an enormous economic impact. Despite great advances in the measurement of frictional forces on the atomic scale, friction coefficients between two materials are still empirical quantities. The reason for the lack of understanding in this field is the fact that the contact region between two materials is hardly accessible to a direct study unless they are transparent.
Micro-and nanofocused beams of hard x-rays from an ultra-high-brilliance synchrotron radiation source like PETRA IV are uniquely suited to illuminate the contact area between two sliding surfaces with outstanding spatial resolution. These beams give access to structure and dynamics of frictional processes under operando conditions. The goal of this workshop is to discuss scientific cases related to tribological challenges that can be addressed by efficient x-ray scattering methods for characterizing dynamical and structural properties of interfaces in sliding contact.
Invited speakers include:
Roland Bennewitz (Uni Saarbrücken)
Dirk Dietzel (Uni Giessen)
Enrico Gnecco (Uni Jena)
Christian Greiner (KIT)
Stefanie Hanke (Uni Duisburg-Essen)
Fillipo Mangolini (Leeds)
Michael Sprung (DESY)
Oliver Seeck (DESY)
Andreas Schropp (DESY)
Markus Valtiner (BA Freiberg)
Organized by Martin Dienwiebel (KIT) and Ralf Röhlsberger (DESY)
For organisational issues please contact: petra4-workshops-orga@desy.de
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