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Coatings
Special Issues
Surface Engineering of Alloys
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Surface Engineering of Alloys

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 5708

Special Issue Editor

Dr. Iosif Gershman

E-Mail Website
Guest Editor
Joint Stock Company Railway Research Institute, Moscow State Technological University “Stankin” (MSTU “STANKIN”), 127994 Moscow, Russia
Interests: materials science; friction; coatings; nonequilibrium thermodynamics; self-organization; wear-resistant materials; non-ferrous metals and alloys; microstructure; properties; development; research; production; operation; testing; evolution
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue on "Surface Engineering of Alloys". Surface engineering of alloys is an important step in various processes, including coating, and can be both artificial and natural. Artificial surface engineering of alloys includes, for example, creating a preliminary roughness before coating, applying a soft running-in coating on the surface of antifriction alloys, and hardening the surface of steel counter bodies to increase wear resistance. An example of a natural treatment of alloy surfaces can be the formation of altered structures on friction surfaces. The formation of these structures leads to a decrease in the wear rate. The main task in this area is to study the patterns of formation of such structures. This refers to the dependence of their composition and properties on the friction regimes and the composition and properties of rubbing bodies. The results of such studies will optimize the artificial surface treatment of alloys. It should be noted that coating is an artificial process; however, the reaction of the interface and the structure of the layer attachment on application is a natural process. Moreover, it is interesting to investigate what this reaction is aimed at. For example, it can be aimed at better retention of the layer, i.e., to increase adhesion. This is expressed, for example, in the appearance of a certain surface roughness of the substrate during the deposition process, uneven composition over the thickness of the deposited layer, etc.

The aim of this Special Issue is to present the latest experimental and theoretical developments in the field, through a combination of original research papers and review articles from leading groups around the world.

In particular, the topic of interest includes but is not limited to:

  • The relationship of artificial surface engineering of alloys with its functional characteristics;
  • The relationship of surface pretreatment with the properties of the applied layer;
  • The reaction of the surface of the substrate to external influences;
  • Changes in the surface characteristics of the substrate during coating;
  • The relationship of the natural effects in the coating with the characteristics of the coating.

Dr. Iosif Gershman
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. 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

  • alloy surface
  • artificial processing
  • natural processing
  • functional processing
  • coating
  • functional characteristics of the surface

Published Papers (3 papers)

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Research

12 pages, 7330 KiB  
Article
Microstructural Studies of the Copper-Based Coating Obtained by Cold Gas-Dynamic Spraying for the Restoration of Worn-Out Contact Wires
by Sergey Grigoriev, Eugeniy Gershman, Iosif Gershman, Alexander Mironov and Pavel Podrabinnik
Coatings 2021, 11(9), 1067; https://doi.org/10.3390/coatings11091067 - 3 Sep 2021
Cited by 4 | Viewed by 1404
Abstract
The microstructure of the coating obtained by cold gas-dynamic spraying was investigated. A Cu-Al2O3-Zn powder blend was sprayed onto a copper substrate to restore a worn copper contact wire. The coating thickness was 1–2.5 mm. Mechanisms of coating formation [...] Read more.
The microstructure of the coating obtained by cold gas-dynamic spraying was investigated. A Cu-Al2O3-Zn powder blend was sprayed onto a copper substrate to restore a worn copper contact wire. The coating thickness was 1–2.5 mm. Mechanisms of coating formation are discussed on the basis of microstructure studies. The relationship between the microstructure and the properties of the coating such as adhesion strength and electrical conductivity is shown. Improved adhesion strength was achieved through substrate surface preprocessing with coarse Al2O3 particles. Full article
(This article belongs to the Special Issue Surface Engineering of Alloys)
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10 pages, 2068 KiB  
Article
Properties of Cold Spray Coatings for Restoration of Worn-Out Contact Wires
by Sergey Grigoriev, Eugeniy Gershman, Iosif Gershman and Alexander Mironov
Coatings 2021, 11(6), 626; https://doi.org/10.3390/coatings11060626 - 24 May 2021
Cited by 7 | Viewed by 2004
Abstract
The influence of Cu-Al2O3-Zn powder mixtures for cold spraying on the properties of the coatings is studied. The coatings were deposited to restore worn-out copper contact wires, which were used as a substrate. The main parameters, such as adhesion, [...] Read more.
The influence of Cu-Al2O3-Zn powder mixtures for cold spraying on the properties of the coatings is studied. The coatings were deposited to restore worn-out copper contact wires, which were used as a substrate. The main parameters, such as adhesion, specific electrical conductivity, hardness, and wear resistance, were examined. The content of Al2O3 in the mixture varied from 30% to 60%, and the content of Zn, from 0% to 20%. The results obtained indicate that the 60Cu-40Al2O3 coating was the most adhesive and showed the best conductivity, while 40% Cu-50% Al2O3-10% Zn was found to be the most wear-resistant. The optimum spraying temperature was 500 °C. Full article
(This article belongs to the Special Issue Surface Engineering of Alloys)
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10 pages, 2597 KiB  
Article
The Influence of Neodymium Element on the Crater Structure Formed on Al-17.5Si Alloy Surface Processed by High-Current Pulsed Electron Beam
by Kui Li, Bo Gao, Ning Xu, Yue Sun, Vladimir Viktorovich Denisov and Liang Hu
Coatings 2020, 10(10), 922; https://doi.org/10.3390/coatings10100922 - 25 Sep 2020
Cited by 4 | Viewed by 1743
Abstract
The effect of neodymium element on the elimination of crater structures on the surface of Al-17.5Si metallic materials processed by high-current pulsed electron beam was investigated in this study. Field emission scanning electron microscopy analysis indicated that the grain sizes of Al-17.5Si metallic [...] Read more.
The effect of neodymium element on the elimination of crater structures on the surface of Al-17.5Si metallic materials processed by high-current pulsed electron beam was investigated in this study. Field emission scanning electron microscopy analysis indicated that the grain sizes of Al-17.5Si metallic materials were reduced and craters were removed from surfaces of the processed Al-17.5Si metallic material after addition of Nd. This can be attributed to the efficient transfer of heat accumulated in rich-silicon (primary silicon) areas without the eruption of a primary silicon phase if the size of primary silicon grains are small. The X-ray diffraction analysis indicates that all diffraction peaks are broadened because of the presence of structural defects, grain refinement and stress state. Electron probe micro-analyzer analysis demonstrated that Al and Nd were evenly distributed on the surface of the treated alloy, which could be attributed to the diffusion of the element. Transmission electron microscopy analysis showed that nano-Al and nano-Si cellular textures were generated during the treated process. The formation of these structures can be attributed to rapid heating and cooling effects by the treatment. Finally, electrochemical tests revealed that the corrosion current density of Al-17.5Si metallic materials (with Nd, 0.3 wt.%.) surface decreased by three orders of magnitude compared with that of the processed Al-17.5Si metallic material surfaces (without Nd). This can be attributed to the elimination of craters and grain refining. Full article
(This article belongs to the Special Issue Surface Engineering of Alloys)
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