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doi:10.22028/D291-27484
Titel: | Low Friction and High Solid-Solid Contact Ratio—A Contradiction for Laser-Patterned Surfaces? |
VerfasserIn: | Bettscheider, Simon Grützmacher, Philipp Rosenkranz, Andreas |
Sprache: | Englisch |
Titel: | Lubricants |
Bandnummer: | 5 |
Heft: | 3 |
Verlag/Plattform: | MDPI |
Erscheinungsjahr: | 2017 |
DDC-Sachgruppe: | 600 Technik |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
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 der Erstveröffentlichung: | 10.3390/lubricants5030035 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-274846 hdl:20.500.11880/28589 http://dx.doi.org/10.22028/D291-27484 |
ISSN: | 2075-4442 |
Datum des Eintrags: | 16-Jan-2020 |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Materialwissenschaft und Werkstofftechnik |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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lubricants-05-00035.pdf | 3,87 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons