The Indirect Tribological Role of Carbon Nanotubes Stimulating Zinc Dithiophosphate Anti-Wear Film Formation
| Autor: | Tomasz Runka, Andrzej Kulczycki, Jarosław Kałużny, Krzysztof Kempa, Adam Piasecki, Jerzy Merkisz, Oleksandr Stepanenko, Bartosz Gapiński, Michał Mendak, Wojciech Dzięgielewski, Damian Łukawski |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element 02 engineering and technology Carbon nanotube Zinc Article law.invention Metal lcsh:Chemistry chemistry.chemical_compound symbols.namesake 0203 mechanical engineering law General Materials Science carbon nanotubes Tribology 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports chemistry Electron diffraction Chemical engineering lcsh:QD1-999 Zinc dithiophosphate visual_art anti-wear symbols visual_art.visual_art_medium tribology 0210 nano-technology Raman spectroscopy Tribometer |
| Zdroj: | Nanomaterials Nanomaterials, Vol 10, Iss 1330, p 1330 (2020) Volume 10 Issue 7 |
| ISSN: | 2079-4991 |
| Popis: | Experimental studies reveal that the simultaneous addition of zinc dialkyl dithiophosphates (ZDDPs) and multi-wall carbon nanotubes (MWCNTs) to a poly-alpha-olefin base oil strongly reduces wear. In this paper, it is shown that MWCNTs promote the formation of an anti-wear (AW) layer on the metal surface that is much thicker than what ZDDPs can create as a sole additive. More importantly, the nanotubes&rsquo action is indirect, i.e., MWCNTs neither mechanically nor structurally strengthen the AW film. A new mechanism for this effect is also proposed, which is supported by detailed tribometer results, friction track 3D-topography measurements, electron diffraction spectroscopy (EDS), and Raman spectroscopy. In this mechanism, MWCNTs mediate the transfer of both thermal and electric energy released on the metal surface in the friction process. As a result, this energy penetrates more deeply into the oil volume, thus extending the spatial range of tribochemical reactions involving ZDDPs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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