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
Morphology and composition of tribofilms deposited using tribochemical burnishing technique
Stockholm University, Faculty of Science, Department of Physics.
2014 (English)In: Tribology - Materials, Surfaces & Interfaces, ISSN 1751-5831, E-ISSN 1751-584X, Vol. 8, no 1, 14-20 p.Article in journal (Refereed) Published
Abstract [en]

Using a modified burnishing technique, low friction tribofilms can be formed on steel and cast iron surfaces in a controlled manner, before the part is mounted in e.g. an engine. The influence on the underlying substrate as well as the morphology and composition of the tribofilm has been thoroughly investigated in this paper. The coating process was found to smoothen rough plateaus, but not affecting deeper scratches and grooves, e.g. a honing pattern. The influence on the substrate was limited and no significant stresses were introduced in the surface. The tribofilm was mostly amorphous and typically 50–80 nm thick, composed of Fe, O and W, with minor additions of C and S.

Place, publisher, year, edition, pages
Maney Publishing, 2014. Vol. 8, no 1, 14-20 p.
Keyword [en]
Tribofilm, Coating, Surface analysis, Friction, Wear
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-114741DOI: 10.1179/1751584X14Y.0000000069OAI: oai:DiVA.org:su-114741DiVA: diva2:793947
Available from: 2015-03-09 Created: 2015-03-09 Last updated: 2017-12-04Bibliographically approved
In thesis
1. Nanoparticle assisted tribofilm formation and material transfer studied with SEM and TEM
Open this publication in new window or tab >>Nanoparticle assisted tribofilm formation and material transfer studied with SEM and TEM
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The discovery and subsequent synthesis of metal containing fullerenes- IFS (Inorganic Fullerene-like Structures) by R. Tenne et al. has generated considerable scientific interest with great potential impact in many industrial application areas such as lubrication. The lubrication mechanism (tribofilm formation) via exfoliation and deposition of the atomic layers from this cage-like IF-particles was revealed and demonstrated first by this research group. The incorporation of the nanoparticles into lubricants (oils, greases) is however not straightforward.

When two surfaces are sliding against each other and a lubricant is used, a thin layer (tribofilm) is formed on the contact area. The friction reducing effects of the nanoparticles can be altered or hindered by certain additives that are used in lubricative oils. The effects of such additives on the tribological behavior of the nanoparticles are investigated by analyzing the tribofilms formed on the worn surfaces using energy-dispersive X-ray spectroscopy in a scanning electron microscope. Another challenge of nanoparticles in lubricants is the penetration of the nanoparticles into the contact zone. A possible solution of this problem is briefly discussed.

A modified burnishing technique can be used to coat sliding metallic surfaces with a friction reducing tribofilm. The morphology and composition of these tribofilms was investigated with analytical electron microscopy techniques.

In the second part of the thesis electron microscopy was used to investigate the material transfer. Titanium is an elements with high adhesive ability to the counter surface, it displays poor tribological properties in sliding metallic contacts. This can lead to material transfer and consequently severe surface damage. The cold formation and machining of titanium, thus can lead rapid tool wear and poor surface finish. Electron microscopy techniques were used to study the mechanism of titanium transfer to different counter surfaces.

Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University, 2015. 140 p.
Keyword
WS2 inorganic fullerene-like nanoparticles, lubrication, tribofilm, SEM, TEM, EELS, EDS, coating, surface analysis, friction, wear, titanium, material transfer
National Category
Physical Sciences
Research subject
Physics
Identifiers
urn:nbn:se:su:diva-114745 (URN)978-91-7649-116-4 (ISBN)
Public defence
2015-04-24, sal FD5, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Available from: 2015-04-01 Created: 2015-03-09 Last updated: 2015-04-09Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Jenei, István Zoltán
By organisation
Department of Physics
In the same journal
Tribology - Materials, Surfaces & Interfaces
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 48 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