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The use of non-polar base oil with diamond-like carbon coatings in low-speed boundary lubrication regime [Elektronski vir]Velkavrh, Igor ; Kalin, Mitjan ; Vižintin, JožeDiamond-like carbon (DLC) coatings are nowadays used in various mechanical systems, including high-stressed and lubricated applications. Today, still a lot is unknown about the physical interactions ... between the lubricants and DLC coatings. Primarily, what is the role of the base oil in the DLC contact? Do base oil films adsorb to the DLC surface or are they only a passive element in the contact? In this study self-mated DLC/DLC contacts were employed steel/steel contacts where used as reference for the expected lubrication mechanisms, which are well known for steel. In tribological experiments, low velocity boundary lubrication conditions were applied to eliminate effect of speed. Low-viscosity polyalphaolefin base oil was used as a lubricant, and some tests were also made with no lubricant in the contact. Results showed that the friction of boundary lubricated DLC contacts is always lower than the friction of steel contacts. However, in low-speed boundary lubrication regime, friction of DLC contacts increased in comparison with the non-lubricated conditions, which is the opposite to steel behaviour. Nevertheless, oil was required to stabilize friction behaviour and to prevent from high wear and the failure of the DLC coating.Source: Nordtrib 2010 [Elektronski vir] (Str. 1-8)Type of material - conference contributionPublish date - 2010Language - englishCOBISS.SI-ID - 11452443
Author
Velkavrh, Igor |
Kalin, Mitjan |
Vižintin, Jože
Topics
DLC prevleke |
tribologija |
trenje |
mazanje
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Database name | Field | Year |
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Velkavrh, Igor | 28613 |
Kalin, Mitjan | 14556 |
Vižintin, Jože | 00812 |
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