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Advanced Spray Coatings
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Advanced Spray Coatings

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

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 11008

Special Issue Editor

Prof. Dr. Yasutaka Ando

E-Mail Website
Guest Editor
Division of Mechanical Engineering, Ashikaga University, 268-1 Omaecho, Ashikaga, Tochigi 326-0845, Japan
Interests: thermal spray technology; photocatalysis; CVD; diamond; nitriding, XRD
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As a thin-film or thick-coating deposition process, spray technologies such as thermal spray, spray pyrolysis, and so on have been practically used for over 20 years due to their high deposition rate and low equipment cost in comparison with those of the conventional CVD and PVD processes, etc. In addition, since new spray technologies, such as HVOF (high-velocity oxygen fuel flame spraying), cold spraying, and SPS (suspension plasma spraying), in the field of thermal spray technology were developed and have been practically used recently, the utility of spray technologies are still widely spread. Therefore, information on the latest and prominent research on spray technologies are very important for engineers and researchers in this research field.

This Special Issue of Coatings on “Advanced Spray Technology” is intended to cover original research and critical review articles on recent advances in all aspects of spray technologies.

In particular, the topic of interest includes but is not limited to the following:

  • Fundamentals and new concepts of spray technology;
  • Spray coatings for electronics devices;
  • Modeling and simulation of chemical reactions during film deposition;
  • Diagnostics of spray flow during film deposition.

Prof. Dr. Yasutaka Ando
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

  • thermal spray
  • spray pyrolysis
  • HVOF
  • suspension plasma spray
  • solution precursor plasma spray

Published Papers (3 papers)

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Research

23 pages, 4812 KiB  
Article
Effect of Harvesting Stages and Calcium Chloride Application on Postharvest Quality of Tomato Fruits
by Mohammad Nurun Nabi Mazumder, Azizah Misran, Phebe Ding, Puteri Edaroyati Megat Wahab and Azhar Mohamad
Coatings 2021, 11(12), 1445; https://doi.org/10.3390/coatings11121445 - 24 Nov 2021
Cited by 6 | Viewed by 3933
Abstract
Tomatoes are a good source of vitamins, minerals, antioxidants, and enzymes, which are beneficial to human health. They are one of the most commercially high-value vegetable crops that experience a huge postharvest loss after harvest. The present experiment is conducted to investigate the [...] Read more.
Tomatoes are a good source of vitamins, minerals, antioxidants, and enzymes, which are beneficial to human health. They are one of the most commercially high-value vegetable crops that experience a huge postharvest loss after harvest. The present experiment is conducted to investigate the effect of different maturity stages (mature green, breaker, and half-ripe stage), pre- and post-harvest treatment with different concentrations (0.0%, 1.0%, 1.5%, and 2.0%, w/v) of calcium chloride (CaCl2) on the postharvest performance, antioxidant and enzymatic activity of lowland tomato fruits, stored at ambient temperature (28 ± 2  °C and 75 ± 5% RH). Tomato fruit of mature green stage treated with 2% CaCl2 significantly (p = 0.05) declined the ethylene production (15.53%), weight loss (16.43%), and delayed color development by slowly synthesizes the lycopene content as well as extended the shelf life. The maximum amount of total phenolic content (TPC) was demonstrated at the highest level of CaCl2 (2%) after 20 days of storage life at ambient conditions. The concentration of CaCl2 influenced the activity of different plant defense enzymes, and the higher doses of CaCl2 (2%) accelerated the activity of peroxidase (POD) (13%), polyphenol oxidase (POP) (7.3%), and phenylalanine ammonia-lyase (PAL) (8.5%) relative to that of the control samples. Therefore, the tomato producers and traders could extend the storage duration of tomato fruits by harvesting at the mature green stage and applying 2% CaCl2 in both pre-and postharvest at ambient storage conditions. Full article
(This article belongs to the Special Issue Advanced Spray Coatings)
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18 pages, 8689 KiB  
Article
The Dual Character of MAX Phase Nano-Layered Structure Highlighted by Supersonic Particles Deposition
by Alberto Ion, Pierre Sallot, Victor Badea, Patrice Duport, Camelia Popescu and Alain Denoirjean
Coatings 2021, 11(9), 1038; https://doi.org/10.3390/coatings11091038 - 29 Aug 2021
Cited by 1 | Viewed by 1700
Abstract
MAX phase compounds offer an attractive mixture of ceramic–metallic properties due to their covalent ionic–metallic nature. Since their discovery, a great interest was attributed to their synthesis and potential applications, but the processing of pure compounds as coatings for industrial large-scale application is [...] Read more.
MAX phase compounds offer an attractive mixture of ceramic–metallic properties due to their covalent ionic–metallic nature. Since their discovery, a great interest was attributed to their synthesis and potential applications, but the processing of pure compounds as coatings for industrial large-scale application is still considered a challenge. To date, a limited number of papers have evaluated the build-up of MAX phase coating by cold spray (CS), a novel cost-effective and productive spray technology used in both areas of research and industry. Employing CS, the hot gas-propelled material particles have ballistic impingement on a substrate where they undergo plastic deformation. Because of the brittleness, internal delamination, and limited deformability, the deposition of the pure MAX phase is rather challenging. This paper presents the building-up ability of dense MAX-phase coatings by CS with retained structures and compositions, in close relation with the substrate characteristics and phase composition that influences the dual character ceramic–metallic behaviour. Besides recent literature, the originality of this research consists of pioneering deposition of Ti3AlC2 that emphasizes the ceramic–metallic character influenced by the particle speed and the mechanical properties of both substrate and compound. Full article
(This article belongs to the Special Issue Advanced Spray Coatings)
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11 pages, 3755 KiB  
Article
Low-Temperature Plasma Nitriding for Austenitic Stainless Steel Layers with Various Nickel Contents Fabricated via Direct Laser Metal Deposition
by Shinichiro Adachi, Motoo Egawa, Takuto Yamaguchi and Nobuhiro Ueda
Coatings 2020, 10(4), 365; https://doi.org/10.3390/coatings10040365 - 07 Apr 2020
Cited by 14 | Viewed by 4078
Abstract
In this study, low-temperature plasma nitriding is applied to austenitic stainless steels at temperatures below 450 °C. This enhances the wear resistance of the steels with maintaining corrosion resistance, by producing expanded austenite (known as the S-phase), which dissolves excessive nitrogen. Austenitic stainless [...] Read more.
In this study, low-temperature plasma nitriding is applied to austenitic stainless steels at temperatures below 450 °C. This enhances the wear resistance of the steels with maintaining corrosion resistance, by producing expanded austenite (known as the S-phase), which dissolves excessive nitrogen. Austenitic stainless steels contain nickel, which has the potential to play an important role in the formation and properties of the S-phase. In this experiment, austenitic stainless steel layers with different nickel contents were processed using direct laser metal deposition, and subsequently treated using low-temperature plasma nitriding. As a result, the stainless steel layers with high nickel contents formed the S-phase, similar to the AISI 316L stainless steel. The thickness and Vickers hardness of the S-phase layers varied with respect to the nickel contents. Due to lesser chromium atoms binding to nitrogen, the chromium content relatively decreased. Moreover, there was no evident change in the wear and corrosion resistances due to the nickel contents. Full article
(This article belongs to the Special Issue Advanced Spray Coatings)
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