TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Bettscheider, Simon
A1  - Grützmacher, Philipp
A1  - Rosenkranz, Andreas
T1  - Low Friction and High Solid-Solid Contact Ratio—A Contradiction for Laser-Patterned Surfaces?
JF  - Lubricants
N2  - Recording of Stribeck-like curves is a common way to study the effect of laser-patterned surfaces on the frictional efficiency. However, solely relying on the coefficient of friction when identifying the lubrication regime and the underlying working principles can be misleading. Consequently, a ball-on-disc tribometer was combined with an electrical resistivity circuit to simultaneously measure Stribeck-like curves and solid-solid contact ratios for polished and laser-patterned samples. Line-like surface patterns with different periodicities were produced by direct laser interference patterning on steel substrates (AISI304). The reference shows a Stribeck-like behavior well correlating with the contact ratios. The behavior deviates for high sliding velocities (high contact ratios) due to a loss of lubricant induced by centrifugal forces pulling the lubricant out of the contact zone. In contrast, the solid–solid contact ratio of the laser-patterned samples is around 80% for all sliding velocities. Those values can be explained by higher contact pressures and the structural depth induced by the surface topography which make a full separation of the surfaces unlikely. Despite those high values for the contact ratio, laser-patterning significantly reduces friction, which can be traced back to a reduced real contact area and the ability to store oil in the contact zone.
Y1  - 2017
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-2940
UR  - http://www.mdpi.com/2075-4442/5/3/35
SN  - 2075-4442
SS  - 2075-4442
U6  - https://doi.org/10.3390/lubricants5030035
DO  - https://doi.org/10.3390/lubricants5030035
VL  - 5
IS  - 3
SP  - 35
S1  - 35
ER  -