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Coatings
Special Issues
Electron-Beam Deposition and Modification of Functional Coatings
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Electron-Beam Deposition and Modification of Functional Coatings

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 7962

Special Issue Editor

Prof. Dr. Nikolay Koval

E-Mail Website
Guest Editor
Institute of High Current Electronics of Siberian Branch of the Russian Academy of Sciences, Tomsk 634055, Russia
Interests: electron beams; electron; ion and plasma sources; electron-ion-plasma modification of material surface; physics of high-current electron beam; physics of plasma; physics of vacuum discharges; plasma emission electronics; generation of low-temperature plasma; film and coating deposition; PVD-methods; nitriding
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 “Electron-beam deposition and modification of functional coatings.”

As electron beams are highly efficient both in their formation and use, they find increasing application in science and technology. The number of such applications is increasing as electron-beam equipment is developed and the irradiation processes of electron beams on materials are studied. The purpose of the present Special Issue is to highlight the current state of and trends in research and technology, development, and use of electron beams with the widest range of their parameters, from continuous to pulsed, from low- to high-current, and from low- to high-energy. Electron beams are widely and efficiently used to create various kinds of functional coatings as well as to improve the properties of coatings produced by other methods.

One characteristic of electron-beam deposition is the high purity and reproducibility of the process due to the use of high vacuum. The produced coatings are non-porous and high-density; they can be multi-component.

The trend of modern technologies is to use a hybrid method, combining the coatings deposition and electron-beam treatment (for example) to improve their properties in a single vacuum cycle. It is possible to achieve results that are not realized using spatially separated processes (deposition and electron-beam treatment). These processes and the results of their use are intended to be covered in the Special Issue.

In particular, the topics of interest include but are not limited to:

  • Equipment for an electron-beam deposition and modification of material surface
  • Processes of electron-beam deposition
  • Electron-beam modification of material surface
  • Properties of electron-beam coatings
  • Complex electron-beam and ion-plasma engineering of material surface

This Special Issue is seeking original and review articles presented by the leading collectives and scientists of the world scientific community in the field of electron-beam equipment and technologies. We hope these papers will demonstrate some of the most significant works performed in recent years as well as trends in the development of this promising scientific and technological direction and its interaction with related areas.

Prof. Nikolay Koval
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

  • electron beams
  • electron-beam deposition
  • electron-beam modification
  • functional coatings
  • coating properties
  • combined processes of surface modification
  • coating application

Published Papers (3 papers)

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Research

15 pages, 7260 KiB  
Article
Experimental Study and Mathematical Modeling of the Processes Occurring in ZrN Coating/Silumin Substrate Systems under Pulsed Electron Beam Irradiation
by Nikolay N. Koval, Tamara V. Koval, Olga V. Krysina, Yurii F. Ivanov, Anton D. Teresov, Pavel V. Moskvin, My Kim An Tran, Nikita A. Prokopenko and Elizaveta A. Petrikova
Coatings 2021, 11(12), 1461; https://doi.org/10.3390/coatings11121461 - 28 Nov 2021
Cited by 2 | Viewed by 1557
Abstract
This paper presents a study of a combined modification of silumin, which included deposition of a ZrN coating on a silumin substrate and subsequent treatment of the coating/substrate system with a submillisecond pulsed electron beam. The local temperature on the samples in the [...] Read more.
This paper presents a study of a combined modification of silumin, which included deposition of a ZrN coating on a silumin substrate and subsequent treatment of the coating/substrate system with a submillisecond pulsed electron beam. The local temperature on the samples in the electron-beam-affected zone and the thickness of the melt zone were measured experimentally and calculated using a theoretical model. The Stefan problem was solved numerically for the fast heating of bare and ZrN-coated silumin under intense electron beam irradiation. Time variations of the temperature field, the position of the crystallization front, and the speed of the front movement have been calculated. It was found that when the coating thickness was increased from 0.5 to 2 μm, the surface temperature of the samples increased from 760 to 1070 °C, the rise rate of the surface temperature increased from 6 × 107 to 9 × 107 K/s, and the melt depth was no more than 57 μm. The speed of the melt front during the pulse was 3 × 105 µm/s. Good agreement was observed between the experimental and theoretical values of the temperature characteristics and melt zone thickness. Full article
(This article belongs to the Special Issue Electron-Beam Deposition and Modification of Functional Coatings)
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12 pages, 8643 KiB  
Article
Enhancing the Oxidation Resistance of NiCrAlY Bond Coat by High-Current Pulsed Electron Beam Irradiation
by Xianxiu Mei, Xiaonan Zhang, Lisong Zhang, Na Li, Peng Zhang, Yuting Guo and Nikolai N. Koval
Coatings 2021, 11(8), 912; https://doi.org/10.3390/coatings11080912 - 29 Jul 2021
Cited by 3 | Viewed by 1751
Abstract
The bond coat of a NiCrAlY thermal barrier coating plays an important role in solving the thermal expansion mismatch between a metal matrix and a ceramic layer and in improving the oxidation resistance of the whole thermal barrier coating. However, the NiCrAlY bond [...] Read more.
The bond coat of a NiCrAlY thermal barrier coating plays an important role in solving the thermal expansion mismatch between a metal matrix and a ceramic layer and in improving the oxidation resistance of the whole thermal barrier coating. However, the NiCrAlY bond coat prepared by low-pressure plasma spraying is not conducive to its oxidation resistance because its lamellar structure is loose, porous and the surface is rough. To improve the oxidation resistance of the bond coat, the NiCrAlY bond coat prepared by plasma spraying was modified by high-current pulsed electron beam with different energy densities. Under the electron beam irradiation, the surface of the coating became smooth, and there was a 3–5 μm thick remelting layer on the surface. Under the irradiation, the thickness of the thermal growth oxide layer decreased, and the oxidation resistance was significantly improved, the oxidation product being mainly Al2O3. Full article
(This article belongs to the Special Issue Electron-Beam Deposition and Modification of Functional Coatings)
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12 pages, 4156 KiB  
Article
Raman Study of Nanocrystalline-Doped Ceria Oxide Thin Films
by Nursultan Kainbayev, Mantas Sriubas, Darius Virbukas, Zivile Rutkuniene, Kristina Bockute, Saltanat Bolegenova and Giedrius Laukaitis
Coatings 2020, 10(5), 432; https://doi.org/10.3390/coatings10050432 - 28 Apr 2020
Cited by 43 | Viewed by 3825
Abstract
Samarium-doped ceria (SDC) and gadolinium-doped ceria (GDC) thin films were formed by e-beam vapor deposition on SiO2 substrate, changing the deposition rate and substrate temperature during the deposition. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-Ray spectrometry (EDS) were [...] Read more.
Samarium-doped ceria (SDC) and gadolinium-doped ceria (GDC) thin films were formed by e-beam vapor deposition on SiO2 substrate, changing the deposition rate and substrate temperature during the deposition. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-Ray spectrometry (EDS) were employed in order to investigate the structure ad morphology of the films. A single Raman peak describing the structure of undoped CeO2 was observed at a frequency of 466 cm−1. Doping of cerium oxide with rare-earth elements shifted the peak to lower frequencies (for Sm—462 cm−1). This shift occurs due to the increased number of oxygen vacancies in doped cerium oxide and it depends on the size and concentration factor of the dopant. It was found that wavenumbers and their intensity differed for the investigated samples, even though the peaks resembled each other in shape. The indicated bands for doped ceria originated as a result of the Raman regime (F2g) of fluorite dioxide associated with the space group (Fm3m). The observed peak‘s position shifting to a lower frequency range demonstrates the symmetric vibrations of oxygen ions around Ce4+ ions in octahedra CeO8. Raman shift to the lower frequencies for the doped samples has two reasons: an increase in oxygen vacancies caused by doping cerium oxide with rare-earth materials and the size factor, i.e., the change in frequency Δω associated with the change in the lattice constant Δa. Full article
(This article belongs to the Special Issue Electron-Beam Deposition and Modification of Functional Coatings)
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