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Coatings
Special Issues
Advanced Surface Functionalization for Enhancing Tribological Performance
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Advanced Surface Functionalization for Enhancing Tribological Performance

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

Deadline for manuscript submissions: closed (15 August 2022) | Viewed by 3569

Special Issue Editors

Prof. Dr. Carsten Gachot

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Guest Editor
Institute for Engineering Design and Logistics Engineering, Vienna University of Technology (TU Wien), 1040 Vienna, Austria
Interests: wear characterization; surface texturing; 2D materials; solid lubrication; tribochemistry; computational materials tribology
Special Issues, Collections and Topics in MDPI journals
Dr. Philipp Grützmacher

E-Mail Website
Guest Editor
Tribology Research Division, Institute of Engineering Design and Product Development, Vienna University of Technology, 1060 Vienna, Austria
Interests: tribology; surface engineering; 2D materials; solid lubricants; materials tribology; laser surface texturing; lubricant migration
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A material’s surface state is the most critical factor when considering physical phenomena that involve the exchange of energy. Over the last few decades, the advances in the knowledge of surface phenomena, in combination with ever-improving characterization methods with higher resolution, have led to breakthroughs in many fields, such as tribology, energy, biology, optics, etc. In nature, the continuous evolution of surfaces has resulted in smart-engineered surfaces for a specific functionality, and prominent examples are the lotus leaf showing high contact angles and self-cleaning or the colorful peacock feather having a 2D photonic crystal structure. In the engineering world, there exists a broad spectrum of techniques that can be used to functionalize surfaces by manipulating the topographical and/or chemical state of a surface.

The focus of this Special Issue “Advanced Surface Functionalization for Enhancing Tribological Performance” will be on approaches of surface functionalization to tackle friction and wear. A successful design of surfaces with enhanced tribological performance will contribute to meeting industrial demands for innovation and sustainability. Possible applications for such surfaces comprise the automotive, aerospace, power, or biomedical sector.

In this Special Issue, we call for experimental or computational studies focusing on surface functionalization with the aim to improve the tribological performance. In particular, these include, but are not limited to, development of coating systems with reduced friction and/or wear, surface texturing techniques, the combination of surface textures and coatings, multiscale or hierarchical surfaces, bioinspired surfaces, and tribofilm formation.

We are confident that some of the findings presented in this Special Issue will lead to better control of friction and wear in future moving mechanical systems and, thus, have a significant positive impact towards improving efficiency, durability, and environmental compatibility in a time where resource and energy efficiency are discussed not only in the scientific community but also on the evening news.

We are looking forward to your contributions.

Prof. Dr. Carsten Gachot
Dr. Philipp Grützmacher
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.

Published Papers (2 papers)

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Research

15 pages, 5260 KiB  
Article
Effect of Groove Width on Micromachine Groove Texture Tribology Characteristics of 0Cr17Ni7Al
by Liguang Yang, Wensuo Ma, Fei Gao and Shiping Xi
Coatings 2022, 12(8), 1221; https://doi.org/10.3390/coatings12081221 - 21 Aug 2022
Cited by 5 | Viewed by 1535
Abstract
Friction and wear are the main forms of material surface failure. Surface modification is very effective in friction reduction and wear resistance systems. Therefore, as a method of surface modification to improve the tribological properties of materials, surface texture has been widely loved [...] Read more.
Friction and wear are the main forms of material surface failure. Surface modification is very effective in friction reduction and wear resistance systems. Therefore, as a method of surface modification to improve the tribological properties of materials, surface texture has been widely loved by scholars. However, most scholars use laser and other processing methods to prepare the surface texture. Although these processing methods have a high preparation efficiency, they cannot obtain a surface texture with high dimensional accuracy due to their non-contact processing characteristics. Moreover, previous studies on different surface texture preparation methods are insufficient. Scholars have not fully studied the size parameters of surface modification. Micromachining is a contact machining method. It has high dimensional accuracy. Therefore, the surface groove texture of 0Cr17Ni7Al material commonly used in sliding bearings was prepared by micromachining in this paper. Under dry friction conditions, the effects of different groove widths on the tribological properties of surface texture were studied. The results show that the friction coefficient at the 0.6 mm-wide groove texture is the lowest, σ = 0.632. The minimum wear rate is ω = 3.351 × 10−4 mm3/(N·mm). The friction coefficient and wear rate of all groove textures are lower than those of untextured surfaces. It can be judged that the groove texture prepared by micromachining has good friction reduction and wear resistance under the same load, time, and linear speed. With the increase of the groove width, the friction coefficient and wear rate of groove texture decrease first and then increase. Full article
(This article belongs to the Special Issue Advanced Surface Functionalization for Enhancing Tribological Performance)
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16 pages, 4785 KiB  
Article
Effect of Texture on Total Energy Consumption of High Frequency Hydraulic Impact Piston Pair
by Hu Mo, Yong Guo and Song Quan
Coatings 2022, 12(3), 340; https://doi.org/10.3390/coatings12030340 - 5 Mar 2022
Cited by 2 | Viewed by 1331
Abstract
Limited by the influence of the traditional clearance seal structure on the leakage and friction loss of piston pair, the energy utilization ratio of the hydraulic impactor is difficult to improve effectively. To solve this problem, a novel micro-texture clearance seal structure of [...] Read more.
Limited by the influence of the traditional clearance seal structure on the leakage and friction loss of piston pair, the energy utilization ratio of the hydraulic impactor is difficult to improve effectively. To solve this problem, a novel micro-texture clearance seal structure of impact piston cylinder was proposed, and an integrated energy consumption evaluation index considering leakage and friction loss of impact piston pair was proposed. Based on the average Reynolds equation, a comprehensive energy consumption analysis model for a textured high-frequency hydraulic impact piston pair was established, and the influence of piston texture parameters on the comprehensive energy consumption under rated working conditions was studied. The results show that the cylindrical texture clearance seal structure provided an effective way to improve the energy utilization ratio of hydraulic impactor, with energy consumption 13~15% less than the traditional structure. Variation of area rates textured made the amplitude value of integrated energy consumption of the piston pair decrease by 4~15%, and the optimum area rate was 0.2~0.4. Depth ratio of texture could also reduce the integrated energy consumption of the piston pair, but the reduction range was small. Full article
(This article belongs to the Special Issue Advanced Surface Functionalization for Enhancing Tribological Performance)
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