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SUMMARY:Ab initio investigation of tribochemistry mechanisms in solid and 
 boundary lubrication 
DTSTART:20160310T141500
DTEND:20160310T160000
DTSTAMP:20260916T042520Z
UID:19fe9eb1e5992c6be07efec0e9f2d779f170faab86d29e7ad2241c49
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Clelia Righi\, Institute of Nanoscience of CNR and Departm
 ent of Physics Informatics and Mathematics\, University of Modena and Regg
 io Emilia\, Italy\nBio : M. Clelia Righi is a researcher at the Institute 
 of Nanoscience of CNR\, Modena Italy\, where she coordinates a research ac
 tivity on computational tribology and tribochemistry. On the latter topic 
 she collaborates with Total SA and Toyota Central Labs industries for the 
 study of lubricant additives and coatings used in automotive applications.
  She completed her PhD in Physics at the University of Modena in 2003. Her
  background is in theoretical and computational condensed matter physics\,
  with emphasis on physical and chemical phenomena occurring at surfaces. S
 he has experience in different methodologies to study materials properties
  at an atomistic level over different scales.\nTribochemistry is the study
  of the chemical reactions occurring between two surfaces in relative moti
 on. These stress-assisted reactions play a central role in many frictional
  phenomena such as boundary lubrication\, where interfacial molecules reac
 t with the contacting surfaces and modify their chemical composition with 
 consequent modification of adhesion and resistance to sliding. This is the
  basic principle for the functionality of lubricant additives\, which are 
 present in motor oils\, and it also explains the influence of air humidity
  on the frictional properties of solid lubricants\, such as molybdenum dis
 ulphide\, graphene/graphite\, and diamond like carbon (DLC). Tribochemical
  reactions are complex processes difficult to monitor by experiments\, so 
 simulations can play a very important role in their understanding. In part
 icular\, ab initio simulations offer an accurate description of the chemic
 al processes in conditions of enhanced reactivity as those imposed by mech
 anical stresses. I will present results that elucidate fundamental aspects
  in the tribochemistry of: i) phosphorus and sulfur-containing lubricant a
 dditives\; ii) MoS2 and graphene solid lubricants interacting with water.
LOCATION:ME D0 1418 http://plan.epfl.ch/?room=MED01418
STATUS:CONFIRMED
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