Please use this identifier to cite or link to this item:
doi:10.22028/D291-27484
Title: | Low Friction and High Solid-Solid Contact Ratio—A Contradiction for Laser-Patterned Surfaces? |
Author(s): | Bettscheider, Simon Grützmacher, Philipp Rosenkranz, Andreas |
Language: | English |
Title: | Lubricants |
Volume: | 5 |
Issue: | 3 |
Publisher/Platform: | MDPI |
Year of Publication: | 2017 |
DDC notations: | 600 Technology |
Publikation type: | Journal Article |
Abstract: | 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. |
DOI of the first publication: | 10.3390/lubricants5030035 |
Link to this record: | urn:nbn:de:bsz:291--ds-274846 hdl:20.500.11880/28589 http://dx.doi.org/10.22028/D291-27484 |
ISSN: | 2075-4442 |
Date of registration: | 16-Jan-2020 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Materialwissenschaft und Werkstofftechnik |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Files for this record:
File | Description | Size | Format | |
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lubricants-05-00035.pdf | 3,87 MB | Adobe PDF | View/Open |
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