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Metals
Special Issues
Advances in Metal-Based Thermal Spray Coatings
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Advances in Metal-Based Thermal Spray Coatings

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Corrosion and Protection".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 4368

Special Issue Editors

Dr. Thomas Grund

E-Mail Website
Guest Editor
Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, 09107 Chemnitz, Germany
Interests: surface technology; surface treatment; coating technology; thermal spraying; gas dynamic cold spraying; materials engineering; interface engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Rico Drehmann

E-Mail Website
Guest Editor
Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, 09107 Chemnitz, Germany
Interests: coating technology; thermal spraying; gas dynamic cold spraying; interface analytics; high-speed effects; wear and tribology

Special Issue Information

Dear Colleagues,

We warmly invite you to submit your original research or review articles to the MDPI Special Issue “Advances in Metal-Based Thermal Spray Coatings”. This Special Issue will comprise well-selected publications on recent developments in the specific field of thermally sprayed metal coatings, with presentation of the state-of-the-art in spray processes, materials, and applications. This issue aims to be of high practical value to readers, i.e., submissions should focus on technologically motivated developments and should clearly describe and evaluate the addressed problems and solutions. The issue is open to all spray processes, metal-based feedstock materials and protective or functional applications.

We especially encourage researchers and developers to submit new results on the following topics:

  • Advanced wire arc, PTA, and wire flame spraying
  • Advanced high-velocity flame spraying
  • Gas dynamic cold spraying and warm spraying
  • New spray materials and coating properties
    • eg., high entropy and compositionally complex alloys (HEA, CCA)
    • eg., metal matrix composites (MMC)
    • eg., nanostructured coatings
  • Coating post-treatment and post-machining
  • Protective metal coatings
    • eg., wear, corrosion, and combined protection
    • eg., tribological coatings
  • Functional metal coatings
    • eg., surfaces with adapted physical or chemical properties
    • e.g., chemically and physically antimicrobial surfaces

Dr. Thomas Grund
Dr. Rico Drehmann
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. Metals 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

  • thermal spray
  • metals
  • wire arc spray
  • (high-velocity) flame spray
  • cold spray
  • high-entropy alloys (HEA)
  • compositionally complex alloys (CCA)
  • metal matrix composites (MMC)
  • wear and corrosion protection
  • antimicrobial coatings

Published Papers (2 papers)

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Research

13 pages, 5468 KiB  
Article
Influence of Current Modulation on Melting Behavior during Wire Arc Spraying
by Sebastian Weis, Stefan Brumm, Robin Grunert, Jan Morgenschweis, Jürgen Bosler and Thomas Grund
Metals 2022, 12(8), 1347; https://doi.org/10.3390/met12081347 - 13 Aug 2022
Viewed by 1546
Abstract
The atomizing gas dynamics and the applied process energy have a significant influence on the produced particles. The melting process of the two wires can be influenced by current modulation. As for arc welding processes, more and more electronic and software-controlled machines are [...] Read more.
The atomizing gas dynamics and the applied process energy have a significant influence on the produced particles. The melting process of the two wires can be influenced by current modulation. As for arc welding processes, more and more electronic and software-controlled machines are being used for arc spraying and will have replaced conventional power sources in the future. Due to the highly dynamic, fast regulating computing technology in the latest energy source, technology arcs can be operated with different current forms and types. The modern machines allow process-stable, reproducible variation of the particles and heat input into the substrate. Constant and pulsed current can be used as current forms. Usable current types are direct current (DC) and alternating current (AC). The electrical parameters must be analyzed to evaluate the process behavior. The consumable used is a wire-shaped iron-based alloy with a diameter of 1.6 mm. Relevant process parameters such as basic current Iground, pulse current Ipulse, pulse duration tpulse, impulse frequency fpulse, and alternating current frequency, fAC, are varied and recorded using appropriate measurement technology. The aim is to change the process performance and thereby the particle formation in a broad band. High-speed images are used to observe the arc and the deposition process. In addition, particle sizes are determined. Full article
(This article belongs to the Special Issue Advances in Metal-Based Thermal Spray Coatings)
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18 pages, 17412 KiB  
Article
Oxide Free Wire Arc Sprayed Coatings—An Avenue to Enhanced Adhesive Tensile Strength
by Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald and Hans Jürgen Maier
Metals 2022, 12(4), 684; https://doi.org/10.3390/met12040684 - 16 Apr 2022
Cited by 9 | Viewed by 1951
Abstract
Conventionally, thermal spraying processes are almost exclusively carried out in an air atmosphere. This results in oxidation of the particles upon thermal spraying, and thus, the interfaces of the splats within the coating are oxidized as well. Hence, a full material bond strength [...] Read more.
Conventionally, thermal spraying processes are almost exclusively carried out in an air atmosphere. This results in oxidation of the particles upon thermal spraying, and thus, the interfaces of the splats within the coating are oxidized as well. Hence, a full material bond strength cannot be established. To overcome this issue, a mixture of monosilane and nitrogen was employed in the present study as the atomising and environment gas. With this approach, an oxygen partial pressure corresponding to an extreme-high vacuum was established in the environment and oxide-free coatings could be realized. It is shown that the oxide-free particles have an improved substrate wetting behaviour, which drastically increases the adhesive tensile strength of the wire arc sprayed copper coatings. Moreover, the altered deposition conditions also led to a significant reduction of the coating porosity. Full article
(This article belongs to the Special Issue Advances in Metal-Based Thermal Spray Coatings)
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