[Zurück]

R. Kolm, I. Gebeshuber, E. Kenesey, A. Ecker, A. Pauschitz, W.S.M. Werner, H. Störi:
"Tribochemistry of mono molecular additive films on metal surfaces, investigated by XPS and HFRR";
in: "Life Cycle Tribology in: Tribology and Interface Engineering Series", Elsevier, Amsterdam/NL, 2005, ISBN: 0-444-51687-5, S. 269 - 282.

In order to see how oxygen and nitrogen containing substances inuence the wear
relating behaviour of diesel
fuels various hydroxychinolines were investigated by means of a high frequency
reciprocating rig (HFRR) tribometer.
Attention was especially given to the connection between the position of the
hydroxyl group at the molecule
and the resulting inuence on the "lubricity" properties of low sulfur diesel
fuel.
Monomolecular lubricant lms were deposited from the liquid phase onto ultra
thin copper lms sputtered onto
silicon wafers. This substrate serves as a model system for bronze materials.
In order to compare the results of
X-ray photoelectron spectroscopy (also called electron spectroscopy for
chemical analysis, ESCA) measurements
with tribological experiments performed with the high frequency reciprocating
rig method additional substrates
made of 100Cr6 steel were used. X-ray photoelectron spectroscopy
investigations
were performed using a VG
ESCALAB Mk III equipped with a special preparation chamber, permitting the
transfer of samples from a uid
cell to the analysis chamber under Helium protective gas. The structure of the
molecular lm is elucidated using
angular resolved X-ray photoelectron spectroscopy. Preliminary X-ray
photoelectron spectroscopy investigations
of ultra thin layers of 8-Hydroxychinoline on copper samples were performed.
Angular resolved measurements
demonstrated that, without tribological stress, full coverage of the surface
with 8-hydroxyquinoline is not possible.
Those results however still need corroboration by atomic force microscopy
investigations.

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