High-pressure lubricity at the meso- and nanoscale (Articolo in rivista)

Type
Label
  • High-pressure lubricity at the meso- and nanoscale (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.87.045412 (literal)
Alternative label
  • Vanossi, A.; Benassi, A.; Varini, N.; Tosatti, E. (2013)
    High-pressure lubricity at the meso- and nanoscale
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vanossi, A.; Benassi, A.; Varini, N.; Tosatti, E. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 87 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR IOM Democritos Natl Simulat Ctr; International School for Advanced Studies; Swiss Federal Laboratories for Materials Science & Technology (EMPA); Curtin University of Technology; IVEC; Abdus Salam International Centre for Theoretical Physics (literal)
Titolo
  • High-pressure lubricity at the meso- and nanoscale (literal)
Abstract
  • The increase of sliding friction upon increasing load is a classic in the macroscopic world. Here we discuss the possibility that friction rise might sometimes turn into a drop when, at the mesoscale and nanoscale, a confined lubricant film separating crystalline sliders undergoes strong layering and solidification. Under pressure, transitions from N to N - 1 layers may imply a change of lateral periodicity of the crystallized lubricant sufficient to alter the matching of crystal structures, influencing the ensuing friction jump. A pressure-induced friction drop may occur as the shear gradient maximum switches from the lubricant middle, marked by strong stick-slip with or without shear melting, to the crystalline slider-lubricant interface, characterized by smooth superlubric sliding. We present high-pressure sliding simulations to display examples of frictional drops, suggesting their possible relevance to the local behavior in boundary lubrication. DOI: 10.1103/PhysRevB.87.045412 (literal)
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