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Coatings
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Surface Properties of Multi-Component Materials
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Surface Properties of Multi-Component Materials

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 4209

Special Issue Editors

Dr. Ahmad Ostovari Moghaddam

E-Mail Website
Guest Editor
Department of Materials Science, Physical and Chemical Properties of Materials, South Ural State University, 454080 Chelyabinsk, Russia
Interests: additive manufacturing; high-entropy materials; high-temperature refractory materials; wear-protective coatings; self-lubricating coatings; energy-related materials (thermoelectrics, electro-catalysts); nanostructure materials; friction stir welding/processing
Special Issues, Collections and Topics in MDPI journals
Dr. Nataliya Shaburova

E-Mail Website
Guest Editor
Department of Materials Science and Physical Chemistry of Materials, South Ural State University, 454080 Chelyabinsk, Russia
Interests: additive manufacturing; friction stir welding/processing; self-lubricating coatings; nanostructure materials; high-entropy materials; high-temperature refractory materials; wear protective coatings; the impact of external physical fields on metal melts; thermal diffusion coatings

Special Issue Information

Dear Colleagues,

Through our history, applied materials have evolved toward more complex compositions, aiming at improving their functionality. Nanocomposites, multicomponent and particularly high-entropy materials (HEMs) are the most recent breakthrough in this search towards materials with optimum mechanical and functional properties. The development of multi-component materials (namely, HEMs), which typically consist of five or more principal elements with (near) equiatomic ratio has opened the door to a vast range of feasible compositions to fabricate novel materials with compositional–functional integrated properties. Recent theoretical and experimental researches in multi-component materials developed different classes of HEMs such as high-entropy alloys (HEAs), high-entropy ceramics (HECs), and high-entropy intermetallic compounds (HEICs) with superior mechanical, wear, and corrosion properties.

The manufacture, design and surface properties of HEMs that are either self-passivating against oxidation and wear or are capable of serving as thermal/diffusion barrier layers or combination provide unprecedented scientific and technological opportunities to develop novel multifunctional bulk and coatings for a wide range of applications from aerospace to oil and gas technologies.

This scope of this Special Issue will serve as a forum for papers in the following concepts:

  • Thermodynamic modeling and experimental research aim at developing new HEMs with superior surface properties (corrosion, oxidation, wear, and biocompatibility);
  • Recent developments in multi-component coatings (HEAs, HECs, HEICs);
  • HEMs and nano-composite coatings produced by different processes, including but not limit to additive manufacturing processes, Friction stir processing, thermal spray, plasma processing, PVD, etc.;
  • Experimental investigation of high temperatures oxidation, wear and mechanical performance of HEMs and Nano-composite coatings under harsh environment conditions;
  • Understanding the surface degradation mechanisms of HEMs under friction, wear or other dynamic loading condition and corrosion;
  • Nanostructured high entropy materials and nanocomposites;
  • Functional properties of high entropy materials; radiation resistance, diffusion barrier, solar absorber coating etc.;
  • Modeling and simulation of fabricating HEMs thin layers and evaluating their properties.

Dr. Ahmad Ostovari Moghaddam
Dr. Nataliya Shaburova
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-entropy matrials
  • nanocomposites
  • surface properties
  • functional properties
  • thermodynamic modeling

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Published Papers (2 papers)

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Research

10 pages, 14921 KiB  
Article
Study of the Influence of V, Mo and Co Additives on the Carbide Formation and Microhardness during Thermal Diffusion Chrome Planting of X35CrNi2-3 Steel
by Nataliya Shaburova, Igor Pashkeev, Olga Samoilova, Vyacheslav Myasoedov and Ahmad Ostovari Moghaddam
Coatings 2023, 13(1), 70; https://doi.org/10.3390/coatings13010070 - 30 Dec 2022
Cited by 1 | Viewed by 1513
Abstract
Saturation diffusion with chromium has not been adequately studied among all the surface thermochemical treatment (STCT) processes of steels. Especially, the complex saturation behavior when several elements are added directly for chemical treatment needs to be systematically studied. This work aims at determining [...] Read more.
Saturation diffusion with chromium has not been adequately studied among all the surface thermochemical treatment (STCT) processes of steels. Especially, the complex saturation behavior when several elements are added directly for chemical treatment needs to be systematically studied. This work aims at determining the effect of V, Mo, and Co on the parameters of chromium thermal saturation diffusion (thickness, phase composition, microstructure, and microhardness) of the surface layer in X35CrNi2-3 steel. The process was carried out at a temperature of 1000 °C for 24 h. The results showed that complex structural chromium plating together with the addition of strong carbide-forming elements (V and Mo) has a significant effect on the phase composition of the fabricated layer, where the formation of VC and Mo2C carbides significantly increases the microhardness of the samples to 2000 HV and 2500 HV, respectively. On the other hand, the addition of Co with a less carbide-forming affinity has little effect on the phase composition of the coating, and nitride compounds predominated in the microstructure similar to the single-element chromium plating. The results indicate the possibility of improving and accelerating the traditional thermal chromium plating processes and opening up new horizons for obtaining gradient coatings with superior tribological properties. Full article
(This article belongs to the Special Issue Surface Properties of Multi-Component Materials)
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11 pages, 42446 KiB  
Article
Effect of Electromagnetic Pulses on the Microstructure and Abrasive Gas Wear Resistance of Al0.25CoCrFeNiV High Entropy Alloy
by Olga Samoilova, Nataliya Shaburova, Valeriy Krymsky, Vyacheslav Myasoedov, Ahmad Ostovari Moghaddam and Evgeny Trofimov
Coatings 2022, 12(5), 688; https://doi.org/10.3390/coatings12050688 - 16 May 2022
Cited by 4 | Viewed by 2146
Abstract
High entropy alloys (HEAs) are among the most promising materials, owing to their vast chemical composition window and unique properties. Segregation is a well-known phenomenon during the solidification of HEAs, which negatively affects their properties. The electromagnetic pulse (EMP) is a new technique [...] Read more.
High entropy alloys (HEAs) are among the most promising materials, owing to their vast chemical composition window and unique properties. Segregation is a well-known phenomenon during the solidification of HEAs, which negatively affects their properties. The electromagnetic pulse (EMP) is a new technique for the processing of a metal melt that can hinder segregation during solidification. In this study, the effect of an EMP on the microstructure and surface properties of Al0.25CoCrFeNiV HEA is studied. An EMP, with an amplitude of 10 kV, a leading edge of 0.1 ns, a pulse duration of 1 ns, a frequency of 1 kHz, and pulse power of 4.5 MW, was employed for melt treatment. It was found that the microstructure of Al0.25CoCrFeNiV HEA changes significantly from dendritic, for an untreated sample, to lamellar “pearlite-like”, for an EMP treated sample. Moreover, EMPs triggered the formation of a needle-like σ-phase within the solid solution grains. Finally, these microstructural and compositional changes significantly increased the microhardness of Al0.25CoCrFeNiV HEA, from 343 ± 10 HV0.3 (without the EMP) to 553 ± 15 HV0.3 (after the EMP), and improved its resistance against gas-abrasive wear. Finally, an EMP is introduced as an effective route to modify the microstructure and phase formation of cast HEAs, which, in turn, opens up broad horizons for fabricating cast samples with tailorable microstructures and improved properties. Full article
(This article belongs to the Special Issue Surface Properties of Multi-Component Materials)
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