Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The effect of DLC coating thickness on elstohydrodynamic friction
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-4271-0380
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-9110-2819
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-3157-4632
2014 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 55, no 2, p. 353-362Article in journal (Refereed) Published
Abstract [en]

The application of surface coatings has been shown to reduce friction in elastohydrodynamic lubrication (EHL), not only in the mixed and boundary regime when asperity interactions occur, but also in the full film regime. Several studies suggest that the full film friction reduction is due to a violation of the no-slip boundary condition and thus slip is taking place between the solid and the liquid. Another hypothesis proposes that the full film friction reduction is due to the low thermal conductivity of diamond-like carbon (DLC) coatings. In this work, two DLC coatings with the same composition, but different thicknesses, are investigated with uncoated steel specimens as a reference, all with the same surface roughness. Friction tests in a ball-on-disk machine show that both coatings reduce friction compared to the uncoated reference case in full film EHL. The thicker coating is significantly more effective at reducing friction than the thinner one at a maximum friction reduction of 41 % compared to 29 % for the thinner coating. Moreover, contact angle measurements, surface energy measurements, and spreading parameter calculations show no statistically significant differences between the two coatings, suggesting that the friction reduction capabilities of coatings in full film EHL cannot be described by solid-liquid interactions alone. The difference in friction reduction between the specimens in this work is mainly attributed to different thermal properties.

Place, publisher, year, edition, pages
2014. Vol. 55, no 2, p. 353-362
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-11987DOI: 10.1007/s11249-014-0364-6ISI: 000338650700016Scopus ID: 2-s2.0-84904718393Local ID: b0b1cb1a-3d4a-4561-a493-41de7df1f455OAI: oai:DiVA.org:ltu-11987DiVA, id: diva2:984937
Note

Validerad; 2014; 20140806 (johsod)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

Open Access in DiVA

fulltext(509 kB)103 downloads
File information
File name FULLTEXT01.pdfFile size 509 kBChecksum SHA-512
c22d31b9723d6a64676616d1f6b14182d0996160244d090187977c84e3525240b0862d53170efc14b3b9200b4fbd715f08ec47f006a940610afb50905c0bce3e
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records BETA

Björling, MarcusLarsson, RolandMarklund, Pär

Search in DiVA

By author/editor
Björling, MarcusLarsson, RolandMarklund, Pär
By organisation
Machine Elements
In the same journal
Tribology letters
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

Search outside of DiVA

GoogleGoogle Scholar
Total: 103 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 174 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf