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Materials
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Progress in Designing of Tribological Materials and Coatings
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Progress in Designing of Tribological Materials and Coatings

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Corrosion".

Deadline for manuscript submissions: closed (10 October 2022) | Viewed by 4787

Special Issue Editor

Prof. Dr. Jerzy Ratajski

E-Mail Website
Guest Editor
Department of Biomedical Engineering, Koszalin University of Technology, 75-453 Koszalin, Poland
Interests: biomedical engineering; surface engineering; nitriding processes; PVD (Physical Vapour Deposition) processes; Finite Element Modelling in surface engineering

Special Issue Information

Dear Colleagues,

The design and manufacturing of advanced tribological materials and coatings have gained importance as methods of reducing energy dissipation and/or mechanical load on moving parts or where the use of lubricants is not possible, and it addresses industrial sectors such as space application, engine technology, dry sliding application and even biomedical implants.

The design encompasses the composition of the materials (doping effect, structured/ layered materials, etc.) whereas manufacturing deals with the possibility to create gradient-based materials, multi-materials thin layers, etc.

In addition, the evaluation of the mechanical properties of such materials or coatings in relation with their application conditions such as high temperature and corrosive environment is essential for their optimization. The use of advanced modelling tools to the material structure and behavior is an asset to refine the design and their lifetime.

In this Special Issue, the latest progresses in designing tribological materials and coatings are thoroughly highlighted and discussed.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Jerzy Ratajski
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. Materials is an international peer-reviewed open access semimonthly 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

  • structured and layered materials
  • Finite Element Modelling
  • coatings and surface engineering
  • tribology
  • multiscale modeling
  • multiphysics modeling
  • wear
  • lubrication
  • tribochemistry

Published Papers (2 papers)

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Research

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16 pages, 5317 KiB  
Article
Investigation of Dry Sliding Friction, Wear and Mechanical Behavior of the Ti-6Al-7Nb Alloy after Thermal Oxidation
by Krzysztof Aniołek, Adrian Barylski, Piotr Kowalewski and Sławomir Kaptacz
Materials 2022, 15(9), 3168; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15093168 - 27 Apr 2022
Cited by 3 | Viewed by 1373
Abstract
The mechanical and tribological characteristics of the Ti-6Al-7Nb alloy were investigated within a wide range of temperature and time parameters of thermal oxidation. The hardness, HIT, and indentation modulus, EIT, of the alloy in question, with and without an anti-wear oxide [...] Read more.
The mechanical and tribological characteristics of the Ti-6Al-7Nb alloy were investigated within a wide range of temperature and time parameters of thermal oxidation. The hardness, HIT, and indentation modulus, EIT, of the alloy in question, with and without an anti-wear oxide layer, were determined. The tribological properties of sliding couples were studied under technically dry friction conditions, using a ball-on-disc tribometer. The test pieces were non-oxidized and oxidized Ti-6Al-7Nb alloy discs, and Al2O3, ZrO2, and 100Cr6 balls were used as counter specimens. After thermal oxidation, the surface of the titanium alloy was characterized by a significantly higher hardness, HIT (8–10 GPa), compared to the surface not covered with oxide layers (3.6 GPa). The study showed that the curvature of the loading segments increased with an increasing oxidation temperature, indicating a strong positive dependence of hardness on the thermal oxidation temperature. The value of the indentation modulus, EIT, was also found to increase with the increasing oxidation temperature. The intensity of the tribological processes was strictly dependent on the oxidation parameters and the couple’s material (Al2O3, ZrO2, 100Cr6). It has been shown that the thermal oxidation process makes it possible to control, within a wide range, the friction-wear characteristics of the Ti-6Al-7Nb alloy. Full article
(This article belongs to the Special Issue Progress in Designing of Tribological Materials and Coatings)
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Review

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11 pages, 27999 KiB  
Review
Indigo—A New Tribological Substance Class for Non-Toxic and Ecological Gliding Surfaces on Ice, Snow, and Water
by Peter Bützer, Dominik Brühwiler, Marcel Roland Bützer, Nassim Al-Godari, Michelle Cadalbert, Mathias Giger and Sandro Schär
Materials 2022, 15(3), 883; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15030883 - 24 Jan 2022
Cited by 3 | Viewed by 2849
Abstract
The biogenic substance E-indigo can form supramolecular, hydrophobic structures using self-organization. These structures show a low coefficient of friction as a gliding layer against polar surfaces. The formation of primary particles with platelet morphology based on hydrogen-bonded E-indigo molecules is ideal to produce [...] Read more.
The biogenic substance E-indigo can form supramolecular, hydrophobic structures using self-organization. These structures show a low coefficient of friction as a gliding layer against polar surfaces. The formation of primary particles with platelet morphology based on hydrogen-bonded E-indigo molecules is ideal to produce the gliding layer. Structures with excellent gliding properties can be achieved by means of directed friction and high pressure, as well as through tempering. The resulting hard, thin gliding layer of E-indigo does not easily absorb dirt and, thus, prevents a rapid increase in friction. Field tests on snow, with cross-country skis, have shown promising results in comparison to fluorinated and non-fluorinated waxes. Based on quantitative structure–activity relationship (QSAR) data for E-indigo, and its isomers and tautomers, it has been demonstrated that both the application and abrasion of the thin indigo layers are harmless to health, and are ecologically benign and, therefore, sustainable. Full article
(This article belongs to the Special Issue Progress in Designing of Tribological Materials and Coatings)
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