Special Issue "Thermal Spray Processes: The Evolution of Equipment, Technology and Feedstock"

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 31 August 2018

Special Issue Editors

Guest Editor
Prof. Dr. Lech Pawlowski

University of Limoges, SPCTS, 12, rue Atlantis 87068 Limoges, France
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Interests: thermal spray technology of powders and suspension; nanometric coatings technology, in particular suspension plasma spray metal oxide coatings (hydroxyapatite, titania, zirconia); laser treatment of materials (laser heating, glazing and engraving); films technologies by laser ablation; characterization techniques by TEM, SEM, XRD, Raman microscopy
Guest Editor
Prof. Dr. Andreas Killinger

Institute for Manufacturing Technologies of Ceramic Components and Composites, University of Stuttgart, Allmandring 7b, D-70569 Stuttgart, Germany
Website | E-Mail
Phone: 0049 173 6546854
Interests: Thermal spraying; Suspension and solution spraying; plasma and high velocity oxy fuel flame spraying; ceramic; cermet and metal coatings; composite coatings; Industrial applications: automotive, biomedical, paper and printing, energy conversion
Guest Editor
Dr. Filofteia-Laura Toma

Fraunhofer Institute for Material and Beam Technology (IWS), Group Manager Thermal Spraying, Business Unit Thermal Surface Technology, Winterbergstrasse 28, D-01277 Dresden, Germany
Website | E-Mail
Interests: research and development of ceramic; hardmetal and metal coatings by various thermal coating processes and their industrial applications; thermal spraying with suspensions from the development of appropriate hardware components to the tailored coating solutions and technology transfer

Special Issue Information

Dear Colleagues,

Thermal spraying is one of most versatile technologies in coatings deposition. Its attractiveness results from its high efficiency of deposition of a broad range of materials, including ceramics, metals, and alloys. In the last few years, new emerging spray technologies, mainly cold spraying and thermal spraying with liquid feedstocks, have become of increasing interest. The torches used to spray use cold or warm gases accelerated in a De Laval nozzle; hot gases or plasmas being heated by gas combustion or by an electric arc. The evolutions in torches design include the ways of feedstock injection and methods of gas heating. The use of liquid feedstock, such as suspensions and solution precursors, enabled the achievement of new coating architectures and the achievement of promising mechanical or thermophysical properties. On the other hand, development of metal-cladded ceramic powders paves the way to obtain cermet coatings with the use of the cold spray technique.

The proposed Special Issue of Metals invites the authors of papers that are active in the development of these new thermal spray processes, as well as on the design of new concepts for feedstock.

Prof. Dr. Lech Pawlowski
Prof. Dr. Andreas Killinger
Dr. Filofteia-Laura Toma
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 papers will be 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 1200 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

  • Cold gas spraying
  • Suspension thermal spraying
  • Solution precursor thermal spray
  • Plasma spray torches evolution
  • Metal cladded ceramic powder for cold spray

Published Papers (2 papers)

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Research

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Open AccessArticle The Properties of Arc-Sprayed Aluminum Coatings on Armor-Grade Steel
Metals 2018, 8(2), 142; https://doi.org/10.3390/met8020142
Received: 3 December 2017 / Revised: 14 February 2018 / Accepted: 17 February 2018 / Published: 22 February 2018
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Abstract
This article presents the results of an examination of the properties of arc-sprayed aluminum on alloyed armor-grade steel. Thermal arc spraying was conducted with a EuTronic Arc Spray 4 wire arc sprayer. Aluminum wire 1.6 mm in diameter was used to produce dense,
[...] Read more.
This article presents the results of an examination of the properties of arc-sprayed aluminum on alloyed armor-grade steel. Thermal arc spraying was conducted with a EuTronic Arc Spray 4 wire arc sprayer. Aluminum wire 1.6 mm in diameter was used to produce dense, abrasion- and erosion-resistant coatings approx. 1.0 mm thick with and without nickel/5% aluminum-buffered subcoating. Aluminum coatings were characterized in accordance with ASTM G 65-00 abrasion resistance test, ASTM G 76-95 erosion resistance tests, ASTM C 633-01 adhesion strength, HV0.1 hardness tests and metallographic analyses. Results demonstrate properties of arc-sprayed aluminum and aluminum-nickel material coatings that are especially promising in industrial applications where erosion-, abrasion- and corrosion-resistant coating properties are required. Full article
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Review

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Open AccessReview Current Progress in Solution Precursor Plasma Spraying of Cermets: A Review
Metals 2018, 8(6), 420; https://doi.org/10.3390/met8060420
Received: 1 May 2018 / Revised: 16 May 2018 / Accepted: 1 June 2018 / Published: 4 June 2018
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Abstract
Ceramic and metal composites, known also as cermets, may considerably improve many material properties with regards to that of initial components. Hence, cermets are frequently applied in many technological fields. Among many processes which can be employed for cermet manufacturing, thermal spraying is
[...] Read more.
Ceramic and metal composites, known also as cermets, may considerably improve many material properties with regards to that of initial components. Hence, cermets are frequently applied in many technological fields. Among many processes which can be employed for cermet manufacturing, thermal spraying is one of the most frequently used. Conventional plasma spraying of powders is a popular and cost-effective manufacturing process. One of its most recent innovations, called solution precursor plasma spraying (SPPS), is an emerging coating deposition method which uses homogeneously mixed solution precursors as a feedstock. The technique enables a single-step deposition avoiding the powder preparation procedures. The nanostructured coatings developed by SPPS increasingly find a place in the field of surface engineering. The present review shows the recent progress in the fabrication of cermets using SPPS. The influence of starting solution precursors, such as their chemistry, concentration, and solvents used, to the micro-structural characteristics of cermet coatings is discussed. The effect of the operational plasma spray process parameters such as solution injection mode to the deposition process and coatings’ microstructure is also presented. Moreover, the advantages of the SPPS process and its drawbacks compared to the conventional powder plasma spraying process are discussed. Finally, some applications of SPPS cermet coatings are presented to understand the potential of the process. Full article
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