Novel in situ analysis using synchrotron and ab-initio simulations for nano-tribology
Event details
| Date | 10.03.2016 |
| Hour | 14:15 › 16:00 |
| Speaker |
Dr. Seiji Kajita, Toyota Central R&D Labs., Inc. Institute of Nanoscience of CNR and Department of Physics Informatics and Mathematics, University of Modena and Reggio Emilia, Italy Bio : Seiji Kajita is a researcher at Toyota Central R&D Labs., Inc. and a visiting researcher at the Institute of Nanoscience of CNR, Modena Italy, dedicated to nano-tribology by using experiments and simulations collaborating with Dr. M. C. Righi. He completed his doctor degree in Physics at the Chiba University in 2007. His expertise is based on theoretical and computational condensed matter physics and surface science. |
| Location | |
| Category | Conferences - Seminars |
Control of the tribological phenomena, which involves friction and wear, is still unattained because the physical/chemical principles have not been fully elucidated due to the extreme difficulty to observe the sliding interface. Typically, indirect analysis has been carried out on samples after friction tests, but this “ex-situ” approach merely derives indirect information from the sliding interface. To reveal the hidden interface, we developed “in-situ” approaches to clarify atomistic mechanisms of wear and tribochemical reaction. I will present a new experiment that is able to record friction forces, optical images of the sliding surface and X-ray diffraction spectra simultaneously by exploiting a synchrotron light source. The second part of this talk is dedicated to ab-initio calculations that elucidate fundamental aspects in the tribochemistry of diamond like carbon interacting with water. Moreover, I will introduce a developing methodology to couple the reactive surface layer simulated by the ab-initio calculations with classical atoms described by semi-infinite dynamic lattice Green’s function (SI-DLGF). The SI-DLGF atoms that represents an infinitely-large solid bulk reproduce phonon-energy dissipation properly, which allows us to explore these non-equilibrium interfacial phenomena accurately.
Practical information
- Expert
- Free
- This event is internal
Organizer
- LAMMM
Contact
- Géraldine Palaj