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Plasma-Sprayed Thermal Metal Matrix Composite Coatings
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Plasma-Sprayed Thermal Metal Matrix Composite Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Plasma Coatings, Surfaces & Interfaces".

Deadline for manuscript submissions: 16 July 2024 | Viewed by 3041

Special Issue Editor

Dr. Tomasz Dyl

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Guest Editor
Department of Marine Maintenance, Faculty of Marine Engineering, Gdynia Maritime University, 81-225 Gdynia, Poland
Interests: machining; production engineering; plastic working; mechanical and materials engineering; burnishing; shipbuilding; maritime industry; 3D printing; additive manufacturing; Industry 4.0; specialized in mechanical and materials engineering as well as in production engineering, plastic working, machining and burnishing; surface and coatings technology

Special Issue Information

Dear Colleagues,

Composite coatings of ceramic metals are used primarily to enhance the durability of machine parts. Therefore, new materials and technology are permanently searched for, which has resulted in the past in the development of composite materials. The dispersed coatings are consisting of metallic matrix (metals and their alloys) and small non-metallic particles. The deposition of ceramic particles simultaneously with metallic matrix often leads to composite coatings possessing properties much better than those of metallic coating. Metal matrix composites are used in such fields of technology, such as aerospace, electronics, energy, industry, defense, automotive, aviation, shipbuilding, and more.

The welding technology of applying alloy and composite coatings is widely used. The technology of the thermal plasma spraying of metal matrix composites and alloy coatings have been proposed. It is a simple technology and a very useful one in machinery regeneration and production.

The aim of this Special Issue is to present the latest achievements in the theoretical and experimental investigations of the composition and microstructural changes in various materials and coatings subjected to different processing methods and of their performance. In conclusion, it is my pleasure to invite all researchers from the community of alloy and composite coatings to submit a manuscript in the field for this Special Issue.

In this Special Issue, original research articles and reviews are welcome.

We look forward to receiving your contributions.

Dr. Tomasz Dyl
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

  • surface and coatings technology
  • maintenance, repair, and overhaul
  • welding technology
  • plastic working
  • machining and burnishing
  • additive manufacturing
  • 3D printing

Published Papers (2 papers)

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Research

13 pages, 4201 KiB  
Article
After-Machining Surface Layer of Composite Coatings Obtained by Thermal Spraying
by Robert Starosta and Tomasz Dyl
Coatings 2022, 12(7), 956; https://doi.org/10.3390/coatings12070956 - 06 Jul 2022
Viewed by 1204
Abstract
The surface of machine elements is changed to improve their mechanical properties. Ceramic-metal composite coatings are mainly used to increase the durability of machine parts. Therefore, new materials are constantly searched for application in the future development of metal and ceramic composites. The [...] Read more.
The surface of machine elements is changed to improve their mechanical properties. Ceramic-metal composite coatings are mainly used to increase the durability of machine parts. Therefore, new materials are constantly searched for application in the future development of metal and ceramic composites. The nickel and iron elements are usually used as a base and Al2O3 as tough particles. The welding technology for applying alloy and composite coatings is widely used. The common technology used to apply composite coatings is thermal spraying. It is a simple technology and very useful for the production or regeneration of machines. The surface layer is very rough and porous after applying the coating by thermal spraying. In order to obtain the proper surface quality of alloy and composite coatings, after-machining should be used. Many parts of machines strive to achieve an accurate surface. Therefore, a certain roughness is often required. The arithmetic mean of the ordinates of the surface roughness profile was (Ra = 0.16–1.25 μm). The article presents the influence of finishing on the roughness of the surface layer of the coating. After plastic working and machining, the roughness of the surface layer of the coating was reduced. However, it can be seen that, after plastic working, there is a strengthening of the surface layer of the coating and most of the pores were closed. Full article
(This article belongs to the Special Issue Plasma-Sprayed Thermal Metal Matrix Composite Coatings)
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12 pages, 6419 KiB  
Article
Influence of Plasma Torch Power on the Plasma Jet Properties and Microstructure of Alumina Coatings
by Airingas Šuopys, Viktorija Grigaitienė, Liutauras Marcinauskas, Romualdas Kėželis, Rolandas Uscila and Mindaugas Aikas
Coatings 2022, 12(7), 934; https://doi.org/10.3390/coatings12070934 - 01 Jul 2022
Viewed by 1251
Abstract
In this study, alumina coatings were formed using atmospheric plasma spraying, increasing the torch power from 29.4 to 45.1 kW. The surface morphology of the coatings was determined using scanning electron microscopy; the elemental composition was examined using energy-dispersive X-ray spectroscopy (EDS); phase [...] Read more.
In this study, alumina coatings were formed using atmospheric plasma spraying, increasing the torch power from 29.4 to 45.1 kW. The surface morphology of the coatings was determined using scanning electron microscopy; the elemental composition was examined using energy-dispersive X-ray spectroscopy (EDS); phase composition was investigated using X-ray diffraction; and surface roughness was determined using a profilometer. The steel surface temperature was measured using a type-K thermocouple, and the plasma jet temperature, at a distance of 70 mm, using a type-B thermocouple. Alumina particle velocity was calculated by analyzing high-speed camera footage using ImageJ software. The results indicate that plasma jet temperature, speed, and in-flight particle velocity increased with plasma torch power. Furthermore, the amount of γ-Al2O3 phase in the coating increased, and the α-Al2O3 decreased with increasing plasma power. The surface roughness (Rq) of the Al2O3 coatings decreased from 7.13 to 5.54 μm, with an increase in torch power. The EDS measurements indicate that the increase in torch power did not affect the elemental composition of as-sprayed coatings. The results provide a wider understanding of an atmospheric plasma spray technique, optimizing and controlling the parameters using air as a primary gas. Full article
(This article belongs to the Special Issue Plasma-Sprayed Thermal Metal Matrix Composite Coatings)
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