Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures

J. Oksanen, Timo J. Hakala, S. Tervakangas, Petri Laakso, Lauri Kilpi, Helena Ronkainen, J. Koskinen (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)

Abstract

The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.
Original languageEnglish
Pages (from-to)94-103
Number of pages10
JournalTribology International
Volume70
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Texturing
Wear of materials
Lasers
lasers
Temperature
temperature
solid lubricants
Solid lubricants
coating
Coatings
room temperature

Keywords

  • friction
  • laser surface texturing
  • ta-C
  • WS2

Cite this

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title = "Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures",
abstract = "The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.",
keywords = "friction, laser surface texturing, ta-C, WS2",
author = "J. Oksanen and Hakala, {Timo J.} and S. Tervakangas and Petri Laakso and Lauri Kilpi and Helena Ronkainen and J. Koskinen",
year = "2014",
doi = "10.1016/j.triboint.2013.09.005",
language = "English",
volume = "70",
pages = "94--103",
journal = "Tribology International",
issn = "0301-679X",
publisher = "Elsevier",

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Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures. / Oksanen, J.; Hakala, Timo J.; Tervakangas, S.; Laakso, Petri; Kilpi, Lauri; Ronkainen, Helena; Koskinen, J. (Corresponding Author).

In: Tribology International, Vol. 70, 2014, p. 94-103.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Tribological properties of laser-textured and ta-C coated surfaces with burnished WS2 at elevated temperatures

AU - Oksanen, J.

AU - Hakala, Timo J.

AU - Tervakangas, S.

AU - Laakso, Petri

AU - Kilpi, Lauri

AU - Ronkainen, Helena

AU - Koskinen, J.

PY - 2014

Y1 - 2014

N2 - The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.

AB - The possibility of enhancing the tribological properties of ta-C at elevated temperature (250 °C) by laser surface texturing and burnished WS2 addition were investigated. Laser texturing was applied prior to ta-C coating process. Samples were tribologically tested at room temperature and elevated (250 °C) temperature using pin-on-disc. WS2 addition increased remarkably the wear life of ta-C at 250 °C and low COF values (0.01–0.02) were achieved. Laser surface texturing (LST) increased the wear life of WS2/ta-C surfaces by more than two times compared to non-textured surface. The LST dimples functioned as solid lubricant reservoirs and improved the wear life of the initial WS2 layer. This was noticed to be related to wear mechanism with raised position dimples and partly oxidized WS2.

KW - friction

KW - laser surface texturing

KW - ta-C

KW - WS2

U2 - 10.1016/j.triboint.2013.09.005

DO - 10.1016/j.triboint.2013.09.005

M3 - Article

VL - 70

SP - 94

EP - 103

JO - Tribology International

JF - Tribology International

SN - 0301-679X

ER -