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Thermal Sprayed Coatings–Technology, Working Conditions, Durability

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (31 August 2020) | Viewed by 6102

Special Issue Editors


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Guest Editor
Politechnika Slaska w Gliwicach, Institute of Materials Engineering, Gliwice, Poland

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your recent work to this Special Issue on “Thermal Sprayed CoatingsTechnology, Working Conditions, Durability”.

Thermally sprayed protective coatings are widely used in order to protect substrate alloy, which is exposed to extremely difficult operating conditions related with high temperatures, aggressive environments, and mechanical load. High-efficiency solutions in the substrate-coating system are based on the proper recognition of operating conditions and environmental requirements, as well as selection of coating materials and a technological approach to the preparation of surface and protective coatings deposition. A proper selection of technology and type of coating as well as their appropriate preparation is the first step in guaranteeing the high durability of the system. Another aspect of this problem is the real operating conditions concerning industrial applications, which often differ from design assumptions. A correct recognition of working conditions together with appropriately selected material and technology can allow us to obtain a durable system and high efficiency coatings with, at last, low-cost production.

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

  • Description of issues connected with designing and modeling of coatings deposition processes by thermal spraying;
  • Characterization of feedstock powders: Designing, manufacturing, structural characterization, etc.;
  • Technological aspects characterization of thermal spraying;
  • Microstructural characterization of coatings as well as their properties and degradation processes;
  • Selection of regeneration processes and reproduction of usable properties of operated surfaces;
  • Methodology of research expertise and results interpretation;
  • Innovations in the area of thermally sprayed coatings.

Prof. Grzegorz Moskal
Dr. Marta Mikuśkiewicz
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. Materials is an international peer-reviewed open access semimonthly 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 spraying
  • Feedstock materials
  • Microstructure and properties
  • Degradation processes
  • Computational designing and modeling

Published Papers (2 papers)

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Research

28 pages, 24355 KiB  
Article
Oxidation Behavior of the Monolayered La2Zr2O7, Composite La2Zr2O7 + 8YSZ, and Double-Ceramic Layered La2Zr2O7/La2Zr2O7 + 8YSZ/8YSZ Thermal Barrier Coatings
by Anna Jasik, Grzegorz Moskal, Marta Mikuśkiewicz, Agnieszka Tomaszewska, Sebastian Jucha, Damian Migas and Hanna Myalska
Materials 2020, 13(14), 3242; https://doi.org/10.3390/ma13143242 - 21 Jul 2020
Cited by 9 | Viewed by 2612
Abstract
The degradation process of thermal barrier coatings (TBCs) such as monolayered La2Zr2O7, composite 50% La2Zr2O7 + 50% 8YSZ, and double-ceramic layer (DCL) La2Zr2O7/50% La2Zr [...] Read more.
The degradation process of thermal barrier coatings (TBCs) such as monolayered La2Zr2O7, composite 50% La2Zr2O7 + 50% 8YSZ, and double-ceramic layer (DCL) La2Zr2O7/50% La2Zr2O7 + 50% 8YSZ/8YSZ was investigated. Coatings were deposited using the atmospheric plasma spraying (APS) process (ceramic layer and bond-coat) on the Ni-based superalloy substrate with Ni-22Cr-10Al-1Y bond-coat. The thickness of the ceramic top-coats in all cases were 300 µm. In the case of La2Zr2O7/8YSZ, the internal sublayer was built from 8YSZ powder whereas the outer from La2Zr2O7. Between both sublayers’ “composite” a 50% La2Zr2O7 + 50% 8YSZ zone was present. The “composite” 50% La2Zr2O7 + 50% 8YSZ TBC system was sprayed from two different feedstock powders with equal weight ratios. In the first part of the investigation, the microstructural characterization of the TBCs was presented. The main goals were related to the characterization of the degradation processes in different TBC systems with special emphasis on the phenomenon in the thermally grown oxide (TGO) zone related to oxidation, and the phenomenon related to phase stability in ceramic top-coats as related to temperature influence. The oxidation test was carried out in air at 1100 °C for 500 h. In the second step of the investigation, the numerical simulation of the monolayered TBC 8YSZ and La2Zr2O7 systems was analyzed from the stress distribution point of view. Additionally, the two-layered TBC coating of the DCL type was also analyzed. Full article
(This article belongs to the Special Issue Thermal Sprayed Coatings–Technology, Working Conditions, Durability)
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14 pages, 6028 KiB  
Article
Microstructure and Selected Properties of Cr3C2–NiCr Coatings Obtained by HVOF on Magnesium Alloy Substrates
by Ewa Jonda, Leszek Łatka and Wojciech Pakieła
Materials 2020, 13(12), 2775; https://doi.org/10.3390/ma13122775 - 18 Jun 2020
Cited by 17 | Viewed by 2816
Abstract
In present work the Cr3C2–NiCr coating was deposited on magnesium alloy substrate with high velocity oxygen fuel (HVOF) spraying. The microstructure of the samples has been characterized by means of electron microscopy, SEM and phase composition analysis carried out. [...] Read more.
In present work the Cr3C2–NiCr coating was deposited on magnesium alloy substrate with high velocity oxygen fuel (HVOF) spraying. The microstructure of the samples has been characterized by means of electron microscopy, SEM and phase composition analysis carried out. The porosity of coatings has been also estimated. Finally, tests of selected mechanical properties, such as instrumented indentation, abrasive erosion have been performed. The results of the investigations confirmed that dense, homogeneous and well-adhered Cr3C2–NiCr cermet coating is possible to obtain onto the magnesium AZ31 alloy substrate. Moreover, the coatings exhibit high resistance to erosion. Full article
(This article belongs to the Special Issue Thermal Sprayed Coatings–Technology, Working Conditions, Durability)
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