Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.7
3.4
Journals
Coatings
Special Issues
Tribological and Mechanical Properties of Coatings
share announcement

Tribological and Mechanical Properties of Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Corrosion, Wear and Erosion".

Deadline for manuscript submissions: 15 August 2024 | Viewed by 5873

Special Issue Editors

Prof. Dr. María Cristina Moré Farias

E-Mail Website
Guest Editor
Graduate Program in Materials Science and Engineering, University of Caxias do Sul, P.O. Box 1352, Caxias do Sul, Brazil
Interests: tribology; sliding wear; solid lubricants; sintered materials; friction materials; nanoindentation
Dr. Polyana Alves Radi

E-Mail Website
Guest Editor
Programa de Pós-Graduação em Engenharia e Ciência de Materiais (PPG-ECM), UNIFESP, 12231-280 São José dos Campos, Brazil
Interests: tribology; materials; biomedical materials; polymers; thin films

Special Issue Information

Dear Colleagues,

The need to preserve the integrity of substrate-coating systems in harsh environments, ranging from high-temperature cutting applications and automotive, medical, and chemical industries to vacuum atmospheres in aerospace devices, has been seen as an object of enormous concern. It has demanded experimental and theoretical investigations as well as advanced developments. Friction and reduction are of vital importance for coated systems. Friction is among the main factors that input heat during high-speed operations, and determines force levels needed in chipping and forming operations.

The use of multifunctional hard, wear-resistant coatings or low-friction coatings—either by the deposition of layered, dispersion-strengthened, or nanocomposite structures—is among the most highly-exploited approaches to improve the performance of manufacturing tools and sliding components. Driven by the necessity to meet the UN's Sustainable Development Goals, this approach significantly contributes to reducing energy consumption in industrial processes.

Multifunctional coatings need to exhibit exceptional tribological properties, cracking resistance, and thermal management, which is often accomplished by complex coating architectures. The design of such tailored multifunctional properties can be enabled by the use of ex situ and in situ techniques to observe wear mechanisms occurring during sliding investigations as well as advanced mechanical characterization techniques.

The goal of this Special Issue is to provide a forum for papers on the following subjects:

  • Theoretical and experimental approaches on the wear prevention of protective coatings.
  • Computational modelling and simulation of tribocontacts to predict wear and friction of single-component, multilayer, gradient or nanocomposite coatings, from the sub-atomic level to engineering macroscale.
  • Instrumented indentation, instrumented scratching, in situ microscopy, and spectroscopy to predict additional mechanical properties of coatings, e.g., fracture toughness, residual stress at room and high temperature.
  • High-temperature mechanical testing of coatings.
  • Conventional and sophisticated characterization techniques (in situ, AFM, FIB, atom probe tomography, synchrotron X-ray nanodiffraction, micromechanical testing) for the investigation of tribological properties of coatings.
  • Wear and friction testing of coated systems to mimic practical service environments.

Prof. Dr. María Cristina Moré Farias
Dr. Polyana Alves Radi
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

  • high-temperature mechanical and tribological characterization
  • low-friction and wear-resistant coatings
  • contact mechanics of coatings
  • advanced tribological characterization of coatings
  • modeling and simulation of wear and friction of coatings

Published Papers (6 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

21 pages, 7656 KiB  
Article
Wear Behavior Assessment of New Wire-Arc Additively Manufactured Surfaces on AA6061 and AA5086 Alloys through Multi-Walled Carbon Nanotubes and Ni Particles Inducement
by Muhammad Muzamil, Syed Amir Iqbal, Muhammad Naveed Anwar, Muhammad Samiuddin, Junzhou Yang and Muhammad Ahmed Raza
Coatings 2024, 14(4), 429; https://doi.org/10.3390/coatings14040429 - 03 Apr 2024
Viewed by 485
Abstract
This study investigates the new surface development on AA6061 and AA5086 alloys considering the wire-arc additive manufacturing technique as a direct energy deposition (DED) process of wire. Two different quantities of MWCNTs, i.e., 0.01 (low) and 0.02 (high) g, with a constant nickel [...] Read more.
This study investigates the new surface development on AA6061 and AA5086 alloys considering the wire-arc additive manufacturing technique as a direct energy deposition (DED) process of wire. Two different quantities of MWCNTs, i.e., 0.01 (low) and 0.02 (high) g, with a constant nickel (Ni) weight (0.2 g) were pre-placed in the created square patterns. ER4043 filler was used as a wire for additive deposition, and an arc was generated through a tungsten inert gas (TIG) welding source. Furthermore, hardness and pin-on-disk wear-testing methods were employed to measure the changes at the surfaces with the abovementioned inducements. This work was designed to illustrate the hardness and the offered wear resistance in terms of mass loss of the AA6061 and AA5086 aluminum alloys with the function of nano-inducements. Two sliding distance values of 500 m and 600 m were selected for the wear analysis of mass loss from tracks. A maximum increase in hardness for AA6061 and AA5086 alloys was observed in the experiments, with average values of 70.76 HRB and 74.86 HRB, respectively, at a high mass content of MWCNTs. Moreover, the tribological performance of the modified surfaces improved with the addition of MWCNTs with Ni particles in a broader sense; the modified surfaces performed exceptionally well for AA5086 compared to AA6061 with 0.02 and 0.01 g additions, respectively. The system reported a maximum of 38.46% improvement in mass loss for the AA5086 alloy with 0.02 g of MWCNTs. Moreover, the morphological analysis of the developed wear tracks and the mechanism involved was carried out using scanning electron microscope (SEM) images. Full article
(This article belongs to the Special Issue Tribological and Mechanical Properties of Coatings)
►▼ Show Figures

Figure 1

18 pages, 6135 KiB  
Article
Scratch Response of Hollow Cathode Radiofrequency Plasma-Nitrided and Sintered 316L Austenitic Stainless Steel
by Marcelo Broch, Cristian Padilha Fontoura, Arnaldo Oliveira Lima, Michell Felipe Cano Ordoñez, Izabel Fernanda Machado, Cesar Aguzzoli and María Cristina Moré Farias
Coatings 2024, 14(3), 334; https://doi.org/10.3390/coatings14030334 - 12 Mar 2024
Viewed by 635
Abstract
Low-temperature plasma nitriding is a thermochemical surface treatment that promotes surface hardening and wear resistance enhancement without compromising the corrosion resistance of sintered austenitic stainless steels. Hollow cathode radiofrequency (RF) plasma nitriding was conducted to evaluate the influence of the working pressure and [...] Read more.
Low-temperature plasma nitriding is a thermochemical surface treatment that promotes surface hardening and wear resistance enhancement without compromising the corrosion resistance of sintered austenitic stainless steels. Hollow cathode radiofrequency (RF) plasma nitriding was conducted to evaluate the influence of the working pressure and nitriding time on the microstructure and thickness of the nitrided layers. A group of samples of sintered 316L austenitic stainless steel were plasma-nitrided at 400 °C for 4 h, varying the working pressure from 160 to 25 Pa, and the other group was treated at the same temperature, varying the nitriding time (2 h and 4 h) while keeping the pressure at 25 Pa. A higher pressure resulted in a thinner, non-homogeneous nitrided layer with an edge effect. Regardless of the nitriding duration, the lowest pressure (25 Pa) promoted the formation of a homogenously nitrided layer composed of nitrogen-expanded austenite that was free of iron or chromium nitride and harder and more scratching-wear-resistant than the soft steel substrate. Full article
(This article belongs to the Special Issue Tribological and Mechanical Properties of Coatings)
►▼ Show Figures

Figure 1

11 pages, 5337 KiB  
Article
Study of Non-Transformable t’-YSZ by Addition of Niobia for TBC Application
by Daniel Soares de Almeida, Francisco Piorino Neto, Vinicius André Rodrigues Henriques, João Marcos Kruszynski de Assis, Polyana Alves Radi Gonςalves, Renata Jesuina Takahashi and Danieli Aparecida Pereira Reis
Coatings 2024, 14(3), 249; https://doi.org/10.3390/coatings14030249 - 20 Feb 2024
Viewed by 562
Abstract
The high toughness of zirconia is paving the way for the development of new materials for application in TBC for gas turbine blades. The main aim of this work was the obtainment of tetragonal zirconia polycrystalline (TZP) with high density, from mixtures of [...] Read more.
The high toughness of zirconia is paving the way for the development of new materials for application in TBC for gas turbine blades. The main aim of this work was the obtainment of tetragonal zirconia polycrystalline (TZP) with high density, from mixtures of high-purity powder of zirconia, yttria, and niobia with different compositions (14.5 to 21 mol%), through the processes of cold pressing by uniaxial pressing and by isostatic pressing, followed by air sintering processes at 1550 °C for 1 h. The samples were characterized for phase composition by X-ray diffraction, Rietveld analysis, and morphology by transmission electron microscopy and energy dispersive spectroscopy analyses. Mechanical and tribological resistance was evaluated by fracture toughness and nanoindentation tests as well as Weibull statistics. The incorporation of yttria and niobia resulted in relatively denser ceramics with stabilization of the tetragonal phase which was confirmed by detailed X-ray diffraction analysis. Modified ceramics for TBC with 17.5 mol% of yttria and niobia showed higher hardness and fracture toughness, 16.16 GPa and 173.38 GPa, respectively. Through nano hardness measurements, it was possible to verify the effect of the samples’ ferroelasticity. Thus, the addition of niobia and yttria to zirconia represents an opportunity for the development of new materials with increasing mechanical and tribological resistance for TBC application. Full article
(This article belongs to the Special Issue Tribological and Mechanical Properties of Coatings)
►▼ Show Figures

Figure 1

21 pages, 10887 KiB  
Article
A Systematic Investigation of Lead-Free Electroless Ni-B-W Coating Properties Using Taguchi’s Methodology
by Rohit Agrawal, Om Prakash, Lakhbir Singh Brar and Arkadeb Mukhopadhyay
Coatings 2023, 13(9), 1585; https://doi.org/10.3390/coatings13091585 - 11 Sep 2023
Cited by 2 | Viewed by 866
Abstract
Electroless Ni-B (ENB) coatings have industrial importance due to their excellent mechanical properties. The inclusion of W (ENB-W) to the coatings further enhances their mechanical properties and thermal stability. Nevertheless, the ENB or ENB-W coatings are deposited from a heavy metal-stabilized bath, and [...] Read more.
Electroless Ni-B (ENB) coatings have industrial importance due to their excellent mechanical properties. The inclusion of W (ENB-W) to the coatings further enhances their mechanical properties and thermal stability. Nevertheless, the ENB or ENB-W coatings are deposited from a heavy metal-stabilized bath, and the very commonly used stabilizer is lead nitrate. The present work is an attempt to obtain an ENB-W coating with enhanced mechanical properties and elimination of the stabilizer from the bath. To achieve this, the coating bath temperature, the heat treatment temperature and the heat treatment duration were varied systematically following a strategy adopted from Taguchi’s experimental design. The mechanical properties targeted include surface microhardness and scratch hardness. Multi-objective optimization was performed using gray relational methodology. The predicted bath temperature was 85 °C, while the predicted heat treatment temperature was 450 °C and there was 3 h of heat treatment time. The optimized lead-free ENB-W coatings had a microhardness of 1096.2 HV100 and scratch hardness of 13.86 GPa. In fact, single-objective optimization for surface microhardness and scratch hardness by Taguchi’s methodology also predicted the same optimal parametric condition for both scratch hardness and surface microhardness. This was comparable to that of a lead-stabilized ENB-W coating and higher than the as-plated stabilizer free ENB-W coatings. The coating failure of the optimized ENB-W alloy was tested using a progressive scratch test, which showed that there was no chevron or transverse cracks within the load range considered. Analysis of corrosion resistance revealed that the corrosion potential of the optimized coatings was −407 mV, and this was comparable to that of a lead-based ENB-W coating. Full article
(This article belongs to the Special Issue Tribological and Mechanical Properties of Coatings)
►▼ Show Figures

Figure 1

12 pages, 5114 KiB  
Article
Crystalline Structure, Morphology, and Adherence of Thick TiO2 Films Grown on 304 and 316L Stainless Steels by Atomic Layer Deposition
by Vagner Eduardo Caetano Marques, Lucas Augusto Manfroi, Angela Aparecida Vieira, André Luis de Jesús Pereira, Francisco das Chagas Marques and Lúcia Vieira
Coatings 2023, 13(4), 757; https://doi.org/10.3390/coatings13040757 - 10 Apr 2023
Cited by 1 | Viewed by 1383
Abstract
Titanium dioxide (TiO2) thin films are widely used in transparent optoelectronic devices due to their excellent properties, as well as in photocatalysis, cosmetics, and many other biomedical applications. In this work, TiO2 thin films were deposited onto AISI 304 and [...] Read more.
Titanium dioxide (TiO2) thin films are widely used in transparent optoelectronic devices due to their excellent properties, as well as in photocatalysis, cosmetics, and many other biomedical applications. In this work, TiO2 thin films were deposited onto AISI 304 and AISI 316L stainless steel substrates by atomic layer deposition, followed by comparative evaluation of the mixture of anatase and rutile phase by X-ray diffraction, Raman maps, morphology by SEM-FEG-AFM, and adhesion of the films on the two substrates, aiming to evaluate the scratch resistance. Raman spectroscopy mapping and X-ray diffraction with Rietveld refinement showed that the films were composed of anatase and rutile phases, in different percentages. Scratch testing using a diamond tip on the TiO2 film was employed to evaluate the film adherence and to determine the friction coefficient, with the results showing satisfactory adherence of the films on both substrates. Full article
(This article belongs to the Special Issue Tribological and Mechanical Properties of Coatings)
►▼ Show Figures

Figure 1

18 pages, 6294 KiB  
Article
The Effect of the Dilution Level on Microstructure and Wear Resistance of Fe-Cr-CV Hardfacing Coatings Deposited by PTA-P
by Thais Andrezza Passos, Henara Costa, Felipe Kevin Correa Luz and Giuseppe Pintaude
Coatings 2022, 12(12), 1835; https://doi.org/10.3390/coatings12121835 - 27 Nov 2022
Cited by 2 | Viewed by 1386
Abstract
Soil preparation tools are subject to severe abrasion. The wear resistance of various industrial components can be improved using the hardfacing technique. The improvement in hardfacing wear resistance depends on the microstructure, i.e., the chemical composition of the alloys, the method of overlay, [...] Read more.
Soil preparation tools are subject to severe abrasion. The wear resistance of various industrial components can be improved using the hardfacing technique. The improvement in hardfacing wear resistance depends on the microstructure, i.e., the chemical composition of the alloys, the method of overlay, and the parameters of the selected process. The Plasma Transferred Arc with Powder (PTA-P) welding process is interesting as a hardfacing technique since it promotes very low dilution of the substrate in the coating. In this article, the PTA-P welding process was used for the deposition of Fe-Cr-C-based hard coatings with the addition of vanadium onto cheap and relatively soft low-carbon steel substrates. Rubber-wheel abrasion tests were performed to compare the abrasion resistance between commercial anti-wear steel and weld-deposited Fe-Cr-C-V hard coatings. In addition, the microstructure, dilution, and wear mechanisms were investigated. The dilution of the coatings affected the microstructure, in particular, the free mean path of the vanadium carbides, but it only affected abrasion resistance when the wear mechanism involved rolling abrasion. The deposited coatings proved to be at least three times stronger than a commercial abrasion-resistant steel due to the distribution and morphology of the vanadium carbides formed in the coatings. Full article
(This article belongs to the Special Issue Tribological and Mechanical Properties of Coatings)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-6
Back to TopTop