Green Tribology for the Sustainable Engineering of the Future

Published on Nov 18, 2019in Strojniski Vestnik-journal of Mechanical Engineering1.554
· DOI :10.5545/SV-JME.2019.6406
Mitjan Kalin40
Estimated H-index: 40
(University of Ljubljana),
M. Polajnar5
Estimated H-index: 5
(University of Ljubljana)
+ 1 AuthorsFranc Majdič6
Estimated H-index: 6
(University of Ljubljana)
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Abstract
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#1J. Kogovšek (University of Ljubljana)H-Index: 7
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Abstract Several studies have successfully demonstrated the friction-reduction and anti-wear properties of graphene on the nano- and micro-scales, but our understanding of the tribological behaviour of graphene on the macro-scale remains very limited. Accordingly, this study presents the macro-tribological behaviour of a graphene-containing oil in the lubrication of steel/steel contacts and DLC/DLC contacts. We show that graphene platelets, as additives to the base oil, can, especially in the bo...
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#1Maja Kus (University of Ljubljana)H-Index: 3
#2Mitjan Kalin (University of Ljubljana)H-Index: 40
Abstract The effect of additives, their type and structure on the wetting of oil has received little attention so far and is thus poorly understood. This is despite the fact that a number of additives are present in every lubricating oil. Here, we report on the influence of the addition of some simple organic friction modifiers, namely, fatty acids, amides, alcohols and amines, on the static and dynamic (i.e., the advancing and receding contact angles, and the contact-angle hysteresis) wetting o...
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#1Ervin StrmčnikH-Index: 4
#2Franc MajdičH-Index: 6
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#1Ervin Strmčnik (University of Ljubljana)H-Index: 4
#2Franc Majdič (University of Ljubljana)H-Index: 6
Last. Mitjan Kalin (University of Ljubljana)H-Index: 40
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Abstract The low-speed, high-torque, orbital hydraulic motor is a component that often uses mineral oil to convert hydraulic energy into the rotational motion of a shaft. The main purpose of our research was to investigate the possibility of using water, which is a much less environmentally damaging working fluid than oil. The limitations of water lubrication were overcome with an appropriate surface-engineering approach. The surface coated with diamond-like carbon (DLC) significantly reduced bo...
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#1D. Blanco (University of Oviedo)H-Index: 15
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Abstract Isothermal and dynamic methodologies were used to study the thermal degradation of three [NTf 2 ] anion-based ionic liquids (ILs): [C12MIM][NTf 2 ], [N 4441 ][NTf 2 ] and [N 8881 ][NTf 2 ]. Although it is well known that thermal stability is clearly dominated by the coordination ability of the anion, results showed that the cation exerted a significant effect, this being greater in pyrolytic conditions than in oxidising ones. The selected atmosphere also affected the thermal degradation...
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#1Kenneth Holmberg (VTT Technical Research Centre of Finland)H-Index: 38
#2Ali Erdemir (Argonne National Laboratory)H-Index: 74
Calculations of the impact of friction and wear on energy consumption, economic expenditure, and CO2 emissions are presented on a global scale. This impact study covers the four main energy consuming sectors: transportation, manufacturing, power generation, and residential. Previously published four case studies on passenger cars, trucks and buses, paper machines and the mining industry were included in our detailed calculations as reference data in our current analyses. The following can be con...
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#1Rok Simic (University of Ljubljana)H-Index: 13
#2Mitjan Kalin (University of Ljubljana)H-Index: 40
Last. Gregor Jakša (Jožef Stefan Institute)H-Index: 9
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Abstract Information about the interactions between lubricants and DLC coatings is scarce, despite there having been many studies over the years. In this investigation we used ToF-SIMS, XPS and contact-angle analyses to examine the adsorption ability and mechanisms with respect to two oiliness additives, i.e., hexadecanol and hexadecanoic acid, on an a-C:H coating. In addition, we analyzed the resistance of the adsorbed films to external influences like solvent cleaning. The results show that bo...
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#1Andreas Rosenkranz (University of Chile)H-Index: 24
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Continuously increasing global population and, therefore, energy consumption as well as diminishing resources combined with environmental aspects such as global warming ask for more efficient, sustainable and reliable processes/applications of mechanically moving parts. Especially under harsh conditions, such as high temperatures, vacuum or dry contacts, 2D layered nano-materials used as solid lubricants have demonstrated to be promising candidates to ensure low friction and wear over the entire...
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