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Coatings
Special Issues
Tribological Behavior and Mechanical Performance of Coatings and Materials
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Tribological Behavior and Mechanical Performance of Coatings and Materials

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

Deadline for manuscript submissions: 20 November 2024 | Viewed by 5173

Special Issue Editors

Dr. Huimin Qi

E-Mail Website
Guest Editor
Key Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
Interests: tribology; polymer coating; polymer self-lubricated materials; anti-deicing; surface engineering
Dr. Song Li

E-Mail Website
Guest Editor
The Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
Interests: polymer; shape memory polyurethane; friction; wear
Dr. Chunjian Duan

E-Mail Website
Guest Editor
The National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Henan University Jinming Campus, Kaifeng, China
Interests: synthesis of different nanoparticles; various structures and property of polyamide-imide ploy; polymer composite coating design; friction and wear; mechanism of lubrication

Special Issue Information

Dear Colleagues,

It is our pleasure to invite you to submit a manuscript to the forthcoming Special Issue “Tribological Behavior and Mechanical Performance of Coatings and Materials” in Coatings (Open Access Materials Science Journal; Impact Factor 3.236).

Employing coatings is one of the most effective methods to reduce friction and protect contacting surfaces from wear. However, the tribological behavior and mechanical performance of the coatings play an important role in its long service life. Generally, the substrate, the structure and composition of the coating, the surface morphologies and the working conditions significantly affect the tribological performance of the coatings. Therefore, various coatings can be manufactured using different techniques, and they have been applied on various substrates in previous studies, resulting in different characteristics.

This Special Issue focuses on the friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc.), corrosion and oxidation resistance, and mechanical performance of the coatings and materials.

Should you need any further information about this Special Issue, please do not hesitate to contact us.

Dr. Huimin Qi
Dr. Song Li
Dr. Chunjian Duan
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

  • tribology
  • polymer coating
  • ceramic coating
  • metallic coating
  • self-lubricated materials

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Published Papers (6 papers)

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Research

15 pages, 5431 KiB  
Article
Synergistic Effect of Elliptic Textures and H-DLC Coatings for Enhancing the Tribological Performance of CuAl10Fe5Ni5 Valve Plate Surfaces
by Mengjiao Wang, Mingbo Zhu, Xinzheng Hu, Kun Liu, Xuefeng Fan, Xiangkai Meng, Xudong Peng and Jinqing Wang
Coatings 2024, 14(9), 1161; https://doi.org/10.3390/coatings14091161 - 9 Sep 2024
Viewed by 310
Abstract
Axial piston pumps with compact structures and high efficiency are widely used in construction machinery. The efficiency and lifetime strongly depend on the tribological performance of the pump’s valve plate pair. To enhance the tribological performance of the valve plate pair, surface textures, [...] Read more.
Axial piston pumps with compact structures and high efficiency are widely used in construction machinery. The efficiency and lifetime strongly depend on the tribological performance of the pump’s valve plate pair. To enhance the tribological performance of the valve plate pair, surface textures, and H-DLC coatings were fabricated to modify the CuAl10Fe5Ni5 surfaces. The influences of elliptic textures of different sizes and textured H-DLC coatings on the surface friction and wear properties of the valve plate surface under oil lubrication were evaluated using a ring-on-disk tribometer. The results reveal that the friction and wear properties of the CuAl10Fe5Ni5 surfaces are significantly enhanced by elliptic textures, and the friction coefficient and wear rate of textured CuAl10Fe5Ni5 with E90 are maximally decreased by 95% and 87%, respectively. Compared with the surface textures and H-DLC coatings, the textured H-DLC coating has the greatest ability to reduce wear and adhesion. The wear rate of the textured H-DLC coating is further reduced by 98%. This improvement can be explained by the synergistic effect of the elliptic textures and H-DLC coatings, which are attributed to the reduced contact area, debris capture, and secondary lubrication of the elliptic textures, and increased surface hardness. Full article
(This article belongs to the Special Issue Tribological Behavior and Mechanical Performance of Coatings and Materials)
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18 pages, 10914 KiB  
Article
Contrast Role of Third Body Layer and Hard Abrasives in the Wear Process of a TiAlSiN Hardness-Modulated Multilayer Coating: A Case Study on the Effect of Normal Load and Velocity
by Fan Zhao, Zhou Zhu, Jiaxin Yu, Zhiquan Luo and Huimin Qi
Coatings 2024, 14(7), 821; https://doi.org/10.3390/coatings14070821 - 2 Jul 2024
Viewed by 665
Abstract
Working conditions exert an important influence on the tribological properties of protective coatings, thus affecting the wear resistance of workpieces. In this work, a TiAlSiN hardness-modulated multilayer coating with a good match of strength and toughness was deposited on WC-Co substrates. The adhesive [...] Read more.
Working conditions exert an important influence on the tribological properties of protective coatings, thus affecting the wear resistance of workpieces. In this work, a TiAlSiN hardness-modulated multilayer coating with a good match of strength and toughness was deposited on WC-Co substrates. The adhesive wear played a predominant role under the condition of a larger normal load and lower velocity, leading to the formation of a third body layer composed of compressed and lubricating oxides. As a result, the wear rate of the coating tested at 20 N reduced by 23% of that tested at 5 N. Instead, abrasive wear was more manifest, leading to the formation of big-size abrasives, and thus the wear rate increased by 2.8 times while the velocity elevated from 4 mm/s to 16 mm/s. A full factorial analysis of the wear behaviors, including the nanohardness and roughness of the wear track, and the friction coefficient and wear rate of the coating, offered good guidance for the comprehension of the wear form of the TiAlSiN multilayer coating. The results demonstrated the optimization of multilayer structures for TiAlSiN coatings to attain better wear resistance under coupling conditions of normal load and velocity: harder or more lubricated sublayers. Full article
(This article belongs to the Special Issue Tribological Behavior and Mechanical Performance of Coatings and Materials)
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13 pages, 8128 KiB  
Article
Enhancing Tribological Performance of Micro-Arc Oxidation Coatings on 6061 Aluminum Alloy with h-BN Incorporation
by Xia Zhao, Jingfu Song, Jingyi Lin, Guoqing Wang and Gai Zhao
Coatings 2024, 14(6), 771; https://doi.org/10.3390/coatings14060771 - 19 Jun 2024
Cited by 1 | Viewed by 669
Abstract
Micro-arc oxidation (MAO) coatings of aluminum alloy have great potential applications due to their high hardness and wear resistance. However, the micro-pores and defects formed in the discharge channels during the MAO process limit its application in the corrosion field. This study delves [...] Read more.
Micro-arc oxidation (MAO) coatings of aluminum alloy have great potential applications due to their high hardness and wear resistance. However, the micro-pores and defects formed in the discharge channels during the MAO process limit its application in the corrosion field. This study delves into the impact of h-BN nanoparticles into MAO coatings on their structure, corrosion resistance, phase composition, and tribological properties. The results show that the incorporation of h-BN particles reduces the porosity and surface roughness of the coating while enhancing its hardness and wear resistance. The best corrosion resistance is obtained at a concentration of 2 g/L h-BN. An analysis of worn surface morphology, corrosion resistance, and friction coefficient change was conducted to evaluate the performance of this coating. This method provides a new approach to enhance the surface hardness and wear resistance of aluminum alloys, which is significant for expanding the application of aluminum alloys in corrosion environments. Full article
(This article belongs to the Special Issue Tribological Behavior and Mechanical Performance of Coatings and Materials)
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15 pages, 4622 KiB  
Article
Dual-Function Hybrid Coatings Based on Polytetrafluoroethylene and Cu2O for Anti-Biocorrosion and Anti-Wear Applications
by Guohui Li, Huan Li, Yongkun Xu, Ren He, Ga Zhang and Zongzhu Liu
Coatings 2024, 14(5), 592; https://doi.org/10.3390/coatings14050592 - 9 May 2024
Viewed by 913
Abstract
Corrosion and wear issues of motion components exposed to water-based corrosion mediums, e.g., naval vessels and oil extraction equipment, pose challenges for the lifespan and reliability of the motion systems. In this work, epoxy-based coatings modified with polytetrafluoroethylene (PTFE) and cuprous oxide (Cu [...] Read more.
Corrosion and wear issues of motion components exposed to water-based corrosion mediums, e.g., naval vessels and oil extraction equipment, pose challenges for the lifespan and reliability of the motion systems. In this work, epoxy-based coatings modified with polytetrafluoroethylene (PTFE) and cuprous oxide (Cu2O) nanoparticles were prepared. The anti-corrosion performance of the coatings was comparatively investigated by electrical impedance spectroscopy and Tafel tests in sterile and sulphate-reducing bacteria (SRB) mediums. Moreover, the tribological behaviors of the coatings were examined under water lubrication conditions. Our results demonstrate that the epoxy coatings lower significantly the corrosion current density icorr and the charge transfer resistance of the electrical double layer Rct of the carbon steel substrate. Interestingly, the hybrid coatings filled with both PTFE and Cu2O exhibit excellent anti-corrosion and anti-wear performance. After being immersed in the SRB medium for 18 days, the icorr of the pure EP coating and hybrid coatings are 1.10 × 10−7 Amp/cm2 and 0.3 × 10−7 Amp/cm2, and the Rct values are 1.04 × 103 Ω·cm2 and 3.87 × 103 Ω·cm2, respectively. A solid tribofilm forms on the stainless steel counterface sliding against the hybrid coating, which is surmised to be essential for the low friction coefficients and wear. The present work paves a route for formulating the dual-function coatings of anti-biocorrosion and anti-wear. Full article
(This article belongs to the Special Issue Tribological Behavior and Mechanical Performance of Coatings and Materials)
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19 pages, 11778 KiB  
Article
Wear Reduction on the Roller–Shoe Mechanism at High Operation Loads
by Constantin Răzvan Iordache, Carmen Bujoreanu, Stelian Alaci, Florina-Carmen Ciornei and Ionut-Cristian Romanu
Coatings 2024, 14(3), 316; https://doi.org/10.3390/coatings14030316 - 6 Mar 2024
Viewed by 843
Abstract
The roller–shoe mechanism is a classic mechanical assembly with an essential role in motion transmission. Common rail high-pressure pumps are an example of a complex assembly that uses such a mechanism to transform the rotation motion into a translation one. The rolling element [...] Read more.
The roller–shoe mechanism is a classic mechanical assembly with an essential role in motion transmission. Common rail high-pressure pumps are an example of a complex assembly that uses such a mechanism to transform the rotation motion into a translation one. The rolling element of the mechanism is represented by a cylindrical roller. Although it can carry heavy loads due to its design, a proper surface profile could significantly increase the life of the entire mechanism. A better solution can be achieved using a logarithmic profile. The shoe is the second base element of the mechanism. It is a part with an inner cylindrical surface and it is separated from the roller by a thin lubricant film. Considering this, increasing the hardness of the roller–shoe contact surface can be obtained using a suitable coating. The positive results of this coating are highlighted using endurance tests to which high-pressure pumps are subjected. Therefore, the roller profile and the shoe coating represent two directions for improving the contact between the mechanism transmission elements, in terms of wear reduction. The purpose of this paper is to identify a suitable roller profile and to highlight its impact on the shoe coating. Full article
(This article belongs to the Special Issue Tribological Behavior and Mechanical Performance of Coatings and Materials)
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12 pages, 14333 KiB  
Article
Effects of Graphene Oxide on Tribological Properties of Micro-Arc Oxidation Coatings on Ti-6Al-4V
by Qingyuan Hu, Xingming Li, Gai Zhao, Yuling Ruan, Guoqing Wang and Qingjun Ding
Coatings 2023, 13(11), 1967; https://doi.org/10.3390/coatings13111967 - 19 Nov 2023
Cited by 2 | Viewed by 1059
Abstract
This paper investigates the effect of graphene oxide (GO) particles on the friction reduction and wear resistance of coatings on a Ti-6Al-4V alloy generated using the micro-arc oxidation (MAO) technique. Different concentrations of GO were added in aluminate–phosphate electrolyte. The composition of the [...] Read more.
This paper investigates the effect of graphene oxide (GO) particles on the friction reduction and wear resistance of coatings on a Ti-6Al-4V alloy generated using the micro-arc oxidation (MAO) technique. Different concentrations of GO were added in aluminate–phosphate electrolyte. The composition of the MAO coatings was investigated using X-ray diffraction and the energy dispersive spectrum. Measurements of the coating’s thickness, hardness, and roughness have also been conducted. Ball-on-disk friction tests under dry conditions were carried out to reveal the tribological behavior of the MAO coating. The results showed that the coating consisted of Al2TiO5 and γ-Al2O3. The addition of GO greatly reduced the friction coefficient by 25%. The coating with 5 g/L of GO particles exhibited the lowest friction coefficient (reduced from 0.47 to 0.35). Moreover, the coating thickness become thicker (from 10 to 20 μm) with an increase in GO concentration from 0 to 10 g/L. The wear mechanism was revealed via worn surface analysis. This study provides a helpful way to improve the surface wear resistance of titanium alloys. Full article
(This article belongs to the Special Issue Tribological Behavior and Mechanical Performance of Coatings and Materials)
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