INVESTIGADORES
FURLONG Octavio Javier
artículos
Título:
LOW-TEMPERATURE, SHEAR-INDUCED TRIBOFILM FORMATION FROM DIMETHYL DISULFIDE ON COPPER
Autor/es:
OCTAVIO JAVIER FURLONG; BRENDAN PAUL MILLER; PETER V. KOTVIS; WILFRED T. TYSOE
Revista:
ACS APPLIED MATERIALS & INTERFACES
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2011 vol. 3 p. 795 - 800
ISSN:
1944-8244
Resumen:
The frictional properties of a sliding coppercopper interface exposed to dimethyl disulfide (DMDS) are measured in UHV under conditions at which the interfacial temperature rise is <1 K. A significant reduction in friction is found from the clean-surface values and sulfur is found on the surface and below the surface in the wear scar region by Auger spectroscopy. Because the interfacial temperature rise under the experimental conditions used to measure friction is very small, tribofilm formation is not thermally induced. The novel, lowtemperature tribofilm formation observed here is ascribed to a shear-induced intermixing of the surface layer(s) with the subsurface region as suggested using previous molecular dynamics simulations. Although the tribofilm contains predominantly sulfur, a small amount of carbon is also found in the film.
