Role of Roughness Parameters on the Tribology of Randomly Nano-Textured Silicon Surface (Articolo in rivista)

Type
Label
  • Role of Roughness Parameters on the Tribology of Randomly Nano-Textured Silicon Surface (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1166/jnn.2011.4296 (literal)
Alternative label
  • Gualtieri, E.; Pugno, N.; Rota, A.; Spagni, A.; Lepore, E.; Valeri, S. (2011)
    Role of Roughness Parameters on the Tribology of Randomly Nano-Textured Silicon Surface
    in Journal of nanoscience and nanotechnology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gualtieri, E.; Pugno, N.; Rota, A.; Spagni, A.; Lepore, E.; Valeri, S. (literal)
Pagina inizio
  • 9244 (literal)
Pagina fine
  • 9250 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 11 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Universita di Modena e Reggio Emilia; Polytechnic University of Turin; Consiglio Nazionale delle Ricerche (CNR NANO) (literal)
Titolo
  • Role of Roughness Parameters on the Tribology of Randomly Nano-Textured Silicon Surface (literal)
Abstract
  • This experimental work is oriented to give a contribution to the knowledge of the relationship among surface roughness parameters and tribological properties of lubricated surfaces; it is well known that these surface properties are strictly related, but a complete comprehension of such correlations is still far to be reached. For this purpose, a mechanical polishing procedure was optimized in order to induce different, but well controlled, morphologies on Si(100) surfaces. The use of different abrasive papers and slurries enabled the formation of a wide spectrum of topographical irregularities (from the submicro- to the nano-scale) and a broad range of surface profiles. An AFM-based morphological and topographical campaign was carried out to characterize each silicon rough surface through a set of parameters. Samples were subsequently water lubricated and tribologically characterized through ball-on-disk tribometer measurements. Indeed, the wettability of each surface was investigated by measuring the water droplet contact angle, that revealed a hydrophilic character for all the surfaces, even if no clear correlation with roughness emerged. Nevertheless, this observation brings input to the purpose, as it allows to exclude that the differences in surface profile affect lubrication. So it is possible to link the dynamic friction coefficient of rough Si samples exclusively to the opportune set of surface roughness parameters that can exhaustively describe both height amplitude variations (R(a), R(dq)) and profile periodicity (R(sk), R(ku), I(c)) that influence asperity-asperity interactions and hydrodynamic lift in different ways. For this main reason they cannot be treated separately, but with dependent approach through which it was possible to explain even counter intuitive results: the unexpected decreasing of friction coefficient with increasing R(a) is justifiable by a more consistent increasing of kurtosis R(ku). (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it