Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)
O 58.3: Poster
Mittwoch, 13. März 2013, 18:15–21:45, Poster B1
Investigation of Tribological Properties of Mesoporous Alumina Membranes With Water Lubrication — •Florian Krämer1, Felix Wählisch2, Andreas Tschöpe1, Rainer Birringer1, and Roland Bennewitz2 — 1Universität des Saarlandes, Saarbrücken — 2INM - Leibniz-Institut für Neue Materialien
Nanoporous membranes are interesting substrates for tribological applications because their porous structure allows to carry liquid lubricants into the friction interface directly.
In the present study, alumina templates with hexagonally arranged pores were synthezised by two step anodization of aluminum. The alumina-layer was separated by a voltage reversal technique. The barrier oxide at the pore-bottom was dissolved by chemical etching resulting in free-standing mesoporous membranes with complete open pore morphology (pore diameter about 60 nm). The membranes were mounted on a sample holder which allowed the direct contact with a water reservoir. Upon contact, the pores were filled with water by capillary forces to provide a thin water-layer on top of the membrane surface, where the tribological measurements were carried out.
The friction of a 500 µm ruby sphere on the membrane was characterized in the dry and the water-lubricated state by a reciprocal sliding tribometer. The wear track of the tribometer measurement was investigated by atomic force microscopy and scanning electron microscopy.