Please use this identifier to cite or link to this item: doi:10.22028/D291-27821
Title: Influence of Surface Design on the Solid Lubricity of Carbon Nanotubes-Coated Steel Surfaces
Author(s): Schäfer, C
Reinert, L.
MacLucas, T.
Grützmacher, P.
Merz, R.
Mücklich, F.
Suarez, S.
Language: English
Title: Tribology Letters
Volume: 66
Issue: 3
Pages: 89
Publisher: Springer
Year of Publication: 2018
Free key words: Solid lubrication
Laser structuring
Carbon nanotubes
Surface modification
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: Topographically designed surfaces are able to store solid lubricants, preventing their removal out of the tribological contact and thus significantly prolonging the lubrication lifetime of a surface. The present study provides a systematic evaluation of the influence of surface structure design on the solid lubrication effect of multi-walled carbon nanotubes (MWCNT) coated steel surfaces. For this purpose, direct laser writing using a femtosecond pulsed laser system is deployed to create surface structures, which are subsequently coated with MWCNT by electrophoretic deposition. The structural depth or aspect ratio of the structures and thus the lubricant storage volume of the solid lubricant is varied. The frictional behavior of the surfaces is recorded using a ball-on-disk tribometer and the surfaces are thoroughly characterized by complementary characterization techniques. Efficient lubrication is achieved for all MWCNT-coated surfaces. However, and in contrast to what would be expected, it is shown that deeper structures with larger lubricant storage volume do not lead to an extended lubrication lifetime and behave almost equally to the coated unstructured surfaces. This can be attributed, among other things, to differences in the final surface roughness of the structures and the slope steepness of the structures, which prevent efficient lubricant supply into the contact.
DOI of the first publication: 10.1007/s11249-018-1044-8
Link to this record: urn:nbn:de:bsz:291--ds-278217
ISSN: 1573-2711
Date of registration: 9-Apr-2019
Sponsorship ID: EU Rise project Create Network GA 644013
EU-Projectnumber: info:eu-repo/grantAgreement/EC/H2020/644013/EU//createE-Network
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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