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Lubricants
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Matching Ability and Anti-Wear Properties of Lubricants
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Matching Ability and Anti-Wear Properties of Lubricants

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: closed (1 September 2023) | Viewed by 12780

Special Issue Editor

Dr. Fengming Du

E-Mail Website
Guest Editor
Marine Engineering College, Dalian Maritime University, Dalian 116026, China
Interests: coating structure; simulation; wear; metallurgy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The lubricants play an important role in the friction process, which protects the surface of objects.

The structure, composite, matching ability, anti-wear properties of lubricants determine the quality of the lubrication effect. This Special Issue, entitled “Matching ability and anti-wear properties of lubricants”, will promote a platform for the sharing of knowledge among researchers in the field of lubricants including theoretical analysis, numerical simulation, and experimental study. This Special Issue will cover a wide range of disciplines as follows:

  • Microstructure of lubricant;
  • Lubrication simulation;
  • Friction and wear of coatings;
  • Design of lubricant;
  • Surface property;
  • Matching ability of lubricant;
  • Other aspects on lubricant.

Dr. Fengming Du
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • structure of lubricant
  • friciton
  • simulation
  • surface
  • matching ability

Published Papers (5 papers)

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Research

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16 pages, 7826 KiB  
Article
Effect of a Metal Conditioner on the Physicochemical Properties and Tribological Performance of the Engine Oil SAE 5W-30 API SN
by Oriana Palma Calabokis, Yamid Nuñez de la Rosa, Vladimir Ballesteros-Ballesteros, Paulo César Borges and Tiago Cousseau
Lubricants 2023, 11(7), 305; https://doi.org/10.3390/lubricants11070305 - 21 Jul 2023
Cited by 1 | Viewed by 1137
Abstract
Metal conditioners (MC) are added to lubricants to enhance their friction and wear in friction pairs, mainly in engines, gearboxes, and rolling bearings. Its growth in the Brazilian market is primarily focused on internal combustion engines. The effect of mixing MC with commercial [...] Read more.
Metal conditioners (MC) are added to lubricants to enhance their friction and wear in friction pairs, mainly in engines, gearboxes, and rolling bearings. Its growth in the Brazilian market is primarily focused on internal combustion engines. The effect of mixing MC with commercial engine oil (SAE 5W-30 API SN) was studied regarding the rheological and thermal properties. Also, the tribological performance of steel–steel contact was investigated. The rheological and thermal properties were determined by flow curves (at 20, 40, and 100 °C) and differential scanning calorimetry (DSC), respectively. Reciprocating fully-lubricated tests were performed at 40 °C and 80 °C (Po = 1.7 GPa, 5 Hz). Differences in the chemical composition between SAE 5W-30 and its mixture with MC were identified by infrared spectroscopy and related to their tribological performance. The coefficient of friction remained within the range of 0.09–0.1 for all conditions, typical of lubricated steel–steel contacts under boundary and mixed lubrication regimes. However, the mixture improved the wear resistance by around 33% when lubricated at 80 °C compared to the wear resistance offered by 5W-30. The formation of tribofilms with different chemical compositions was confirmed by SEM-EDS for all conditions. At both temperatures, the tribological performance reveals beneficial synergy between the metal conditioner and fully formulated oil additives. The tests lubricated with the mixture at 40 °C showed a less severe wear mechanism when compared to the tests lubricated with neat 5W-30. The study demonstrated that the mixture maintained the physicochemical properties of the commercial oil with a substantial anti-wear action at 80 °C. Full article
(This article belongs to the Special Issue Matching Ability and Anti-Wear Properties of Lubricants)
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14 pages, 6081 KiB  
Article
Tribological Properties of Nanoparticles in the Presence of MoDTC
by Weiwei Wang, Miao Yu, Jiandong Ma and Yuanming Jia
Lubricants 2023, 11(3), 132; https://doi.org/10.3390/lubricants11030132 - 13 Mar 2023
Cited by 1 | Viewed by 1093
Abstract
Nanoparticles can reduce the friction coefficient and present a self-restorative effect and MoDTC is important as a friction-reducing additive. Both are important for improving lubricating performance. In this study, the tribological performances of nanoparticles in the presence of MoDTC were studied. The chemical [...] Read more.
Nanoparticles can reduce the friction coefficient and present a self-restorative effect and MoDTC is important as a friction-reducing additive. Both are important for improving lubricating performance. In this study, the tribological performances of nanoparticles in the presence of MoDTC were studied. The chemical synthetic and ball-milled nanoparticles were selected as test samples, and tribological performances were evaluated by a block-ring friction test rig. Experimental results show that the synthetic serpentine particle with a 200–800 nm diameter exhibits the lowest friction coefficient and wear, while the ball-milled kaolin particle shows the highest friction and wear. A synergistic lubricating effect has been shown when mixing the synthetic nano serpentine particle and MoDTC. The friction coefficient of “BD + synthetic serpentine” reduced from 0.011 to 0.055 after the compound with MoDTC. At 150 °C, the “BD + synthetic serpentine + MoDTC” improves the production of MoS2 on the friction surface, which further reduced the friction coefficient and wear, while the ball-milled kaolin reduced the production of MoS2, which leads to a high friction coefficient. The synthetic serpentine shows a round surface without any sharp edge, which shows the minimal ploughing effect on the friction surface. Based on the experimental results, the synthetic nanoparticles have the best antiwear and friction reduction performance when compounded with MoDTC. Full article
(This article belongs to the Special Issue Matching Ability and Anti-Wear Properties of Lubricants)
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19 pages, 12262 KiB  
Article
Experimental and 3D-Deform Finite Element Analysis on Tool Wear during Turning of Al-Si-Mg Alloy
by Imhade P. Okokpujie, Prince C. Chima and Lagouge K. Tartibu
Lubricants 2022, 10(12), 341; https://doi.org/10.3390/lubricants10120341 - 01 Dec 2022
Cited by 4 | Viewed by 1306
Abstract
Aluminum alloys are becoming increasingly significant in the manufacturing industry due to their light weight and durable properties. Widely applied in aerospace and construction, precision machining is required to ensure the best possible surface quality. The surface quality of a machined component is [...] Read more.
Aluminum alloys are becoming increasingly significant in the manufacturing industry due to their light weight and durable properties. Widely applied in aerospace and construction, precision machining is required to ensure the best possible surface quality. The surface quality of a machined component is directly affected by the tool wear incurred during machining. This research investigated the effect of process parameters and machining conditions on tool wear. The critical process parameters selected were cutting speed, feed rate, and depth of cut. Multi-walled carbon nanotube particles were dispersed in a base fluid of mineral oil to create a new lubricant applied during machining. Pure mineral oil was also used as a lubricant to reduce friction. Machining experiments were carried out with the two lubricants, and the tool wear incurred was measured and compared using a Dinolite microscope. All experiments were carried out with high-speed steel (HSS) cutting tools. Taguchi’s L9 orthogonal array was employed as a methodology to design the experiments. A finite-element 3D simulation was also carried out using DEFORM-3D to provide a scientific explanation of the turning process. Results showed a significant reduction in tool wear when machining with multi-walled carbon nanotubes (MWCNTs), with an average reduction of 14.8% compared to mineral oil. The depth of cut was also the most influential process parameter in terms of tool wear. Full article
(This article belongs to the Special Issue Matching Ability and Anti-Wear Properties of Lubricants)
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Review

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27 pages, 4386 KiB  
Review
Graphene as a Lubricant Additive for Reducing Friction and Wear in Its Liquid-Based Form
by Ab Rahman Marlinda, Gregory Soon How Thien, Mehmood Shahid, Ting Yang Ling, Abu Hashem, Kah-Yoong Chan and Mohd Rafie Johan
Lubricants 2023, 11(1), 29; https://doi.org/10.3390/lubricants11010029 - 11 Jan 2023
Cited by 10 | Viewed by 6152
Abstract
Graphene is a single atomic plane of sp2-bound carbon that has attracted considerable interest in various technologies. On the basis of its unique physical, mechanical, and chemical properties, graphene is a potentially strong candidate as a lubricant additive in its liquid-based [...] Read more.
Graphene is a single atomic plane of sp2-bound carbon that has attracted considerable interest in various technologies. On the basis of its unique physical, mechanical, and chemical properties, graphene is a potentially strong candidate as a lubricant additive in its liquid-based form to reduce friction and protect surfaces from degrading. Furthermore, graphene on wear performance acts as a heat dissipation source for liquid lubricants. This review explores and addresses the fundamental mechanisms illuminating the exceptional tribological behaviours of graphene family materials and their limitations. Although graphene additives were reported to improve friction coefficients and wear properties, several challenges remain a hindrance, such as production costs, dispersion stability, and lack of information regarding graphene optimisation. Thus, this review can provide a standard methodological framework for graphene additives in improving tribological performance. Moreover, this review provides an up-to-date review of current tribological experiments based on ultrafine particles incorporated with graphene as an additive for lubricating liquids. Full article
(This article belongs to the Special Issue Matching Ability and Anti-Wear Properties of Lubricants)
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13 pages, 4851 KiB  
Review
Research Progress Regarding the Use of Metal and Metal Oxide Nanoparticles as Lubricant Additives
by Fengming Du, Cong Li, Dawei Li, Xiaoxia Sa, Yang Yu, Chengdi Li, Yuxing Yang and Jinlong Wang
Lubricants 2022, 10(8), 196; https://doi.org/10.3390/lubricants10080196 - 22 Aug 2022
Cited by 8 | Viewed by 2486
Abstract
Lubricating oil can effectively reduce friction between mechanical parts, thereby reducing energy consumption and improving service life and reliability. Due to the development of science and technology, it is necessary to improve the performance of lubricating oil to fulfill the higher tribological requirements [...] Read more.
Lubricating oil can effectively reduce friction between mechanical parts, thereby reducing energy consumption and improving service life and reliability. Due to the development of science and technology, it is necessary to improve the performance of lubricating oil to fulfill the higher tribological requirements for countering wear and providing lubrication. Nanolubricant additives have the four lubrication mechanisms of micro-bearing, protective film, polishing, and repair effects. A nanolubricant additive can often demonstrate a variety of lubrication mechanisms at the same time. As lubricating additives, metal and metal oxide nanoparticles have outstanding effects which improve the tribological properties of lubricating oil and have been widely studied in the field of tribology. This paper introduces the lubrication mechanism of nanoadditives and the latest research results for metal and metal-oxide nanoparticle lubrication additives. Full article
(This article belongs to the Special Issue Matching Ability and Anti-Wear Properties of Lubricants)
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