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Gas phase lubrication study with an organic friction modifier

Eickworth, Jennifer ; Wagner, Jonas; Daum, Philipp; Dienwiebel, Martin ORCID iD icon 1; Rühle, Thomas
1 Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM), Karlsruher Institut für Technologie (KIT)

Abstract:

Friction modifier additives play a crucial role in controlling friction and wear of lubricated tribological systems. Model experiments in a controllable atmosphere performed by integrating a tribometer into a system of in situ surface analytical methods in vacuum can give insights into the additives functionality. In this work, thin, well-defined layers of an organic friction modifier (OFM) are adsorbed onto an iron oxide surface by means of an effusion cell immediately before measuring friction and wear. The results show that contrary to the assumption that homogeneous layers are formed, this OFM accumulates in droplets on the surface. Droplet number and radius increase with evaporation time. In friction tests, the smallest friction values are found for a low coverage of droplets. For larger droplets, friction increases due to a capillary neck of additive that forms between the sliding surfaces and is dragged along during the friction test.


Verlagsausgabe §
DOI: 10.5445/IR/1000151808
Veröffentlicht am 03.11.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2023
Sprache Englisch
Identifikator ISSN: 0954-0075, 0265-6582, 1354-4063, 1557-6833, 1557-6841, 1557-685X
KITopen-ID: 1000151808
Erschienen in Lubrication Science
Verlag John Wiley and Sons
Heft 1
Seiten 40-55
Vorab online veröffentlicht am 10.10.2022
Nachgewiesen in Scopus
Dimensions
Web of Science
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