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Coatings
Special Issues
Advanced Surface Treatments for Wear Resistance
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Advanced Surface Treatments for Wear Resistance

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Tribology".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 7026

Special Issue Editors

Prof. Dr. Juozas Padgurskas

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Guest Editor
Department of Mechanical, Energy and Biotechnology Engineering, Faculty of Engineering, Vytautas Magnus University, LT-53361 Kaunas, Lithuania
Interests: tribo-system; combined surface treatment; green tribology; bio-degradable oils; self-regulation in tribo-systems
Special Issues, Collections and Topics in MDPI journals
Dr. Raimundas Rukuiža

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Guest Editor
Department of Mechanical, Energy and Biotechnology Engineering, Faculty of Engineering, Vytautas Magnus University, LT-53361 Kaunas, Lithuania
Interests: friction and wear reducing coatings; green tribology materials; bio-degradable oils; nano-particles in lubricants; self-regulation in tribo systems
Special Issues, Collections and Topics in MDPI journals
Dr. Kaouther Khlifi

E-Mail Website
Guest Editor
Laboratory of Mechanics, Materials and Processes, University of Tunis El Manar, Tunis, Tunisia
Interests: Surfaces Treatments; coatings; tribology; nanomechanical behavior; wear resistance; biomedical materials

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your research contribution to this Special Issue, entitled “Advanced Surface Treatments for Wear Resistance.” Friction surface treatment methods are and will always be relevant. The method and technology of treatment, together with the material used to manufacture the element, determines the surface properties and, to a large extent, the performance of the whole element. Understandably, coating technologies are also part of advanced surface treatments, so articles on the topic of coatings are also welcome. The main highlights of this issue are new and combined surface treatment methods and green, i.e., environmentally friendly, technologies. We are looking forward to studies that will assess not only the impact of the surface treatment method (coating) on the physical and mechanical properties of the surface, but also on the friction mechanisms and surface degradation processes.

In particular, the topics of interest of this Special Issue include, but are not limited to, the following:

  • New and combined surface treatment methods
  • Influence of surface treatment on its degradation mechanisms
  • Surface properties research and modeling methods
  • Self-regulatory processes in friction systems
  • Green surface treatment technologies

Prof. Juozas Padgurskas
Dr. Raimundas Rukuiža
Dr. Kaouther Khlifi
Guest Editors

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. Coatings 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

  • environmentally friendly surface treatment
  • combined surface treatment
  • surface degradation mechanisms
  • tribo-system
  • green tribology

Published Papers (3 papers)

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Research

12 pages, 3549 KiB  
Article
Evaluation of Tribological and Mechanical Properties of Carbon Steel with Fluoroligomeric Film at Piezoelectric Actuator Contact
by Juozas Padgurskas, Raimundas Rukuiža and Audrius Žunda
Coatings 2022, 12(4), 463; https://doi.org/10.3390/coatings12040463 - 29 Mar 2022
Cited by 2 | Viewed by 1364
Abstract
The tribological investigations of carbon steel surfaces modified with fluoroligomeric materials were performed. Compared with the uncoated steel, the fluoroligomeric coated surface showed higher plasticity of the modified surface in the scratch tests where the fluoroligomeric film was not destroyed by higher loading. [...] Read more.
The tribological investigations of carbon steel surfaces modified with fluoroligomeric materials were performed. Compared with the uncoated steel, the fluoroligomeric coated surface showed higher plasticity of the modified surface in the scratch tests where the fluoroligomeric film was not destroyed by higher loading. This could be explained by the lower micro hardness of the steel after processing by fluoroligomer and the influence of the adsorbic Rebinder effect. This study includes original results of the loading influence on the efficiency of the piezoelectric actuator and the wear value of the frictional element, which is important explaining the greater longevity of the piezoelectric actuator. Fluoroligomer treatment of the surface considerably improved the performance of the piezoelectric actuator. Using the reference steel roller in the piezoelectric actuator under minimum loads was characterized by a decrease in rotor speed with increasing the pressing of the frictional element. When the rotor was coated by fluoroligomer, the speed remained stable when increasing the pressing force. Using the reference steel roller, the rotation after short-term overloads was not restored, and rollers with fluoroligomeric surface started to rotate soon as the short-term overload was removed. The higher efficiency of piezoelectric actuators with a fluoroligomeric layer on the roller is related to almost two times lower wear of a friction element operating with coated rollers as compared to reference rollers. Full article
(This article belongs to the Special Issue Advanced Surface Treatments for Wear Resistance)
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19 pages, 9491 KiB  
Article
Surface and Tribological Properties of Oxide Films on Aluminium Alloy through Fly-Ash Reinforcement
by Noor Ayuma Mat Tahir, Shahira Liza, Kanao Fukuda, Syazwani Mohamad, Mohd Zakir Fathi Hashimi, Mohd Saifulnizam Mohd Yunus, Yazid Yaakob and Intan Sharhida Othman
Coatings 2022, 12(2), 256; https://doi.org/10.3390/coatings12020256 - 15 Feb 2022
Cited by 5 | Viewed by 2277
Abstract
Hard anodizing has proven to be a helpful surface treatment for aluminium alloy and typically accompanied by the growth of a porous and highly flawed oxide layer. The presence of pores on the oxide surface can be taken as an advantage in improving [...] Read more.
Hard anodizing has proven to be a helpful surface treatment for aluminium alloy and typically accompanied by the growth of a porous and highly flawed oxide layer. The presence of pores on the oxide surface can be taken as an advantage in improving the surface properties. Fly-ash particles are high in SiO2 and Al2O3 content and can be utilized as inexpensive strengthening particles, which can increase the wear resistance and microhardness of composite material. It was noticed that limited research had been carried out in utilizing fly-ash as reinforcement on composite oxide coating as a wear resistance candidate. Thus, this study focused on reinforcing fly-ash on oxide coating and investigating its tribological performance. The composite oxide coating was grown on AA2017 aluminium alloy through anodizing process. To understand the effect of anodizing time and fly-ash content, the parameters were varied from 5–60 min and 0–50 g/L, respectively. The findings suggested that 60 min of anodizing time provides the highest thickness and surface roughness at 35 µm and 6.5 µm, respectively. Interestingly, composite oxide coating with 50 g/L fly-ash provides the highest coating thickness but has the lowest roughness at 52 μm and 8.2 μm, respectively. The composite oxide coatings are observed to reduce friction only for a limited time, despite their potential in significantly reducing the wear rate. The wear mechanism observed was adhesion, micro-crack, and delamination. The findings of this study are believed to provide insight on the potential of fly-ash to be a reinforcement for wear-reduction materials. Full article
(This article belongs to the Special Issue Advanced Surface Treatments for Wear Resistance)
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13 pages, 7353 KiB  
Article
Preparation of Wear-Resistant Coating on Ti6Al4V Alloy by Cold Spraying and Plasma Electrolytic Oxidation
by Mingzeng Shao, Wei Wang, Hongbo Yang, Xueer Zhang and Xiaomei He
Coatings 2021, 11(11), 1288; https://doi.org/10.3390/coatings11111288 - 23 Oct 2021
Cited by 12 | Viewed by 2123
Abstract
In order to improve the wear resistance of Ti6Al4V alloy, the alloy was first coated with alumina-reinforced aluminum coating (CS-coating) by cold spraying, and then the alloy with CS-coating was processed by plasma electrolytic oxidation (PEO) under unipolar mode and soft sparking mode, [...] Read more.
In order to improve the wear resistance of Ti6Al4V alloy, the alloy was first coated with alumina-reinforced aluminum coating (CS-coating) by cold spraying, and then the alloy with CS-coating was processed by plasma electrolytic oxidation (PEO) under unipolar mode and soft sparking mode, respectively, to prepare wear-resistant PEO coatings. For comparison, Ti6Al4V alloy without CS-coating was also subjected to PEO treatment. The microstructure, phase composition, hardness, and wear resistance of the PEO coatings formed on Ti6Al4V alloy with and without CS-coating were investigated. The results revealed that PEO coatings formed on Ti6Al4V alloy with CS-coating under soft sparking mode contained more α-Al2O3, possessed larger thickness, more compact microstructure, and higher microhardness than that formed under unipolar mode. The PEO coating formed on Ti6Al4V substrate was mainly composed of TiO2 and had pores and cracks. Among all these coatings, PEO coating formed on Ti6Al4V alloy with CS-coating under soft sparking mode exhibited the best wear resistance with a wear rate of 1.18 × 10−5 mm3/(Nm), which was only 15.28% of that of the Ti6Al4V substrate. The investigation indicated that the combination of cold spraying and PEO under soft sparking mode is a promising technique for improving the wear resistance of titanium alloy. Full article
(This article belongs to the Special Issue Advanced Surface Treatments for Wear Resistance)
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