Tribological Properties of Nanoparticles

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 4024

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Guest Editor
Laboratory of Tribology and System Dynamics, Ecole Centrale de Lyon, University Lyon, ENISE, ENTPE, CNRS UMR5513, 69134 Ecully, France
Interests: nanolubricants; nanoparticles; lubrication; additives; friction; wear; tribochemistry; nanotribology; in situ characterization techniques; in situ friction test; transmission electron microscopy; surface analysis
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Special Issue Information

Dear Colleagues,

There has been a growing interest in nanoparticles for tribological applications over the past 30 years. Studies on this topic have shown the remarkable lubricating properties, viz. friction-reducing and anti-wear, of certain nanoparticles, especially when used as lubricant additives. Among the nanoparticles with proven tribological performance are carbon nanotubes, carbon onions, nanodiamonds, graphene, BN/ZrO2/TiO2 nanoparticles, inorganic fullerene-like (IF) metal disulfides (IF-MoS2, IF-WS2) nanoparticles, etc. All these nanoparticles have been the subject of detailed investigation these past few years, and many key issues have been tackled, such as the conditions leading to these properties, the lubrication mechanisms coming into play, the influence of parameters such as size, structure, and morphology of the nanoparticles on their tribological properties/lubrication mechanisms, and the interactions between the particles and the lubricant co-additives. In order to answer such questions, state-of-the-art characterization techniques are required, often in situ. Some of these can even visualize the behavior of a nanoparticle in real time during a tribological test.

This Special Issue is designed to showcase some of the most exciting recent findings and future trends in the field of the research in nanoparticles/nanolubricants. Contributions are welcome from researchers working in the fields of tribology, material science, and lubrication science.

Prof. Dr. Fabrice Dassenoy
Guest Editor

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Keywords

  • nanoparticles
  • lubricant additives
  • boundary lubrication
  • friction modifiers
  • anti-wear additives
  • nanolubricants
  • in situ characterization

Published Papers (1 paper)

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Research

25 pages, 11162 KiB  
Article
Nanodiamond Particles as Secondary Additive for Polyalphaolefin Oil Lubrication of Steel–Aluminium Contact
by Ankush Raina, Mir Irfan Ul Haq, Ankush Anand, Sanjay Mohan, Rajiv Kumar, Subramanian Jayalakshmi and Ramachandra Arvind Singh
Nanomaterials 2021, 11(6), 1438; https://doi.org/10.3390/nano11061438 - 29 May 2021
Cited by 14 | Viewed by 3364
Abstract
Nanodiamond (ND) particles are effective lubricant additives. Attention of research has shifted towards investigating the particles as secondary additives. ND particles provide more benefits as secondary additives than as the sole lubricant additive for steel–steel contacts. In this work, the influence of ND [...] Read more.
Nanodiamond (ND) particles are effective lubricant additives. Attention of research has shifted towards investigating the particles as secondary additives. ND particles provide more benefits as secondary additives than as the sole lubricant additive for steel–steel contacts. In this work, the influence of ND particles as secondary additives on oil lubrication of steel–aluminium tribopair (hard–soft contact) was examined. AISI 52100 steel balls were slid against AA2024 aluminium alloy discs, in the presence of polyalphaolefin (PAO) base oil, in boundary lubrication regime (applied normal load: 10 N to 50 N). Primary additives were copper oxide (CuO) and hexagonal boron nitride (h-BN) nanoparticles. The addition of ND particles to PAO, with CuO and h-BN as primary additives, at the lowest applied normal load of 10 N: (i) decreased the volumetric wear of the aluminium discs by 28% and 63%, respectively, and (ii) decreased the coefficient of friction by 15% and 33%, respectively. At the highest applied normal load of 50 N, it: (i) decreased the volumetric wear of the aluminium discs by 20% and 38%, respectively, and (ii) decreased the coefficient of friction by 5.4% and 8%, respectively. ND particles as secondary additives significantly reduce energy loss and power loss as a consequence of an effective reduction in friction during sliding. Unique characteristics of ND particles—such as their (a) physicochemical and thermal properties, (b) ball bearing and polishing effects and (c) synergistic interaction with primary additives to form stable tribofilms—enhance the lubrication performance of steel–aluminium contact. ND particles in combination with h-BN nanoparticles showed the best performance, due to better synergy between the primary additive and the secondary additive. Results from the investigation indicate that ND particles taken as secondary additives in small amount (0.2 wt%) can improve oil lubrication performance of hard–soft contacts in engineering systems. Full article
(This article belongs to the Special Issue Tribological Properties of Nanoparticles)
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