Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
3.6
2.7
Journals
Crystals
Special Issues
Thermal Sprayed Coatings
share announcement

Thermal Sprayed Coatings

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Metals and Alloys".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 2681

Special Issue Editors

Dr. Daniela-Lucia Chicet

E-Mail Website
Guest Editor
Materials Science Department, Materials Science and Engineering Faculty, Gheorghe Asachi Technical University of Iasi, 700050 Iasi, Romania
Interests: thermal spray coating; microstructure; phase transformation; electronic microscopy; splat formation
Dr. Ştefan-Lucian Toma

E-Mail Website
Guest Editor
Faculty of Science and Materials Engineering, Technical University Gheorghe Asachi from Iasi, 700050 Iași, Romania
Interests: thermal spray coating; electric arc spray; CFD simulations; tribological characterisation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Thermal spraying has become one of the well-known processing technologies, now used in a wide range of industries, from automotive to medical, chemical and even aerospace, to provide wear and corrosion resistance, biocompatibility, and thermal insulation (TBC). Its versatility is due both to the multitude of methods and equipment developed since 1909 when Max Ulrich Schoop laid the foundations of this process, and to the variety of materials that can be deposited: ceramics, metals, cermets, and multi-component alloys, in single or multi-layer. The way coatings are formed is unique and is based on the superposition of individual particles that impact and adhere to the substrate, representing the 'bricks' that form the layers. The unique properties of these coatings thus depend on a multitude of working parameters that influence both how the coating adheres to the substrate and how the splats interact with each other. It becomes very clear that the study of splat morphology and particles phase transformations that occur during deposition and rapid solidification is crucial for the understanding of the coating’s formation and behaviour in operation.

For these reasons, I invite you all to contribute with your valuable studies on obtaining, properties and applications, to complete such a complex picture, which will help other researchers and industrial engineers who want to use thermal spray deposited coatings in various applications.

Dr. Daniela-Lucia Chicet
Dr. Ştefan-Lucian 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 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. Crystals 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 coatings
  • splat morphology
  • phase transformation
  • scanning electron microscopy characterization
  • rapid solidification
  • surface functionalization
  • wear behavior
  • corrosion resistance
  • coatings bio-compatibility

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

16 pages, 13395 KiB  
Article
Mechanical Properties and Thermal Shock Behavior of Al2O3-YSZ Ceramic Layers Obtained by Atmospheric Plasma Spraying
by Marian Luțcanu, Ramona Cimpoeșu, Mărioara Abrudeanu, Corneliu Munteanu, Sorin Georgian Moga, Margareta Coteata, Georgeta Zegan, Marcelin Benchea, Nicanor Cimpoeșu and Alice Mirela Murariu
Crystals 2023, 13(4), 614; https://doi.org/10.3390/cryst13040614 - 3 Apr 2023
Cited by 3 | Viewed by 1233
Abstract
Ceramic coatings have many advantages for industrial and medical applications due to their exceptional properties. Ceramic coatings with a thickness of approximately 45 μm, after grinding, were grown using a robotic arm that used the atmospheric plasma spraying procedure. The thermal shock stresses—a [...] Read more.
Ceramic coatings have many advantages for industrial and medical applications due to their exceptional properties. Ceramic coatings with a thickness of approximately 45 μm, after grinding, were grown using a robotic arm that used the atmospheric plasma spraying procedure. The thermal shock stresses—a common situation in applications but difficult to reproduce under laboratory conditions—of the ceramic layers on top of the metal substrate was achieved using solar energy focused by a concentrating mirror, based on experiments conducted in the CNRS-PROMES laboratory, UPR 8521, belonging to the French National Centre for Scientific Research (CNRS). The ceramic layers showed excellent stability at 1000 °C, even at high heating or cooling rates. At high temperatures (above 1800 °C), the exfoliation of the complex ceramic layer was observed. No differences in the structural, phase, mechanical or adhesion properties of the ceramic layer were observed after the thermal shock cycles (in the literature, there have been quite few reports regarding the properties of the ceramic layers after the thermal shock application). Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), atomic force microscopy (AFM) and X-ray diffraction (XRD) techniques were used to characterize the complex ceramic coating and the effects of thermal shock cycling. The phases and chemical composition of the complex coatings remained similar, insensitive to thermal shock at 1000 °C, consisting of a mixture of crystalline yttrium zirconium oxide and α and γ alumina. For all cases, the main residual stress state was tensile. After 5 or 10 cycles of thermal shocks, a smoothing of the residual stress state was observed in the investigated area. A higher temperature (above 1800 °C), applied as thermal shock, led to higher residual stresses and resulted in large cracks and the spallation of the coating layer. Full article
(This article belongs to the Special Issue Thermal Sprayed Coatings)
►▼ Show Figures

Figure 1

17 pages, 6504 KiB  
Article
Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes
by Mariana Henriette Staia, Alberto Mejias, Stephania Kossman and Eli Saul Puchi-Cabrera
Crystals 2023, 13(3), 457; https://doi.org/10.3390/cryst13030457 - 6 Mar 2023
Cited by 1 | Viewed by 1130
Abstract
WC-12Co HVOF-sprayed coatings (~400 µm in thickness) reinforced with multiwalled carbon nanotubes (MWCNTs), were deposited on a steel substrate. The aim of this work is to provide and analyze data from HVOF WC-12Co sprayed coatings, concerning the influence of the addition of MWCNTs [...] Read more.
WC-12Co HVOF-sprayed coatings (~400 µm in thickness) reinforced with multiwalled carbon nanotubes (MWCNTs), were deposited on a steel substrate. The aim of this work is to provide and analyze data from HVOF WC-12Co sprayed coatings, concerning the influence of the addition of MWCNTs on their tribocorrosion performance, in a 3.5% NaCl electrolyte. Electrochemical data (current density and corrosion potential from potentiodynamic polarization curves) and wear data (coefficients of friction, coating volume losses and wear constants) are reported for the coatings, with and without the addition of MWCNTs (labeled WCCNT and WCAS-RECEIVED, respectively), considering the synergistic effects of wear and corrosion coupling. Scanning electron microscopy (SEM) and profilometry are used to explain both the wear and corrosion mechanisms that account for each coating’s performance in this environment. During the tribocorrosion tests, similar wear constants, of the order of approximately 10−12 m3/Nm, were found for all samples, with an increase of ~20% due to the MWCNTs presence. However, for the coatings reinforced with MWCNTs, a remarkable increase in icorr, representing almost 3 times the icorr of the WCAS-RECEIVED coating, was determined. The above results illustrate the complex mechanisms that occur when these coatings are tested under tribocorrosion conditions, which give rise to concurrent interacting phenomena, involving both electrochemical and mechanical responses. Full article
(This article belongs to the Special Issue Thermal Sprayed Coatings)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop