New Trends in the Field of Surface Treatment of Thermal Spraying in the Present and Future

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (10 September 2021) | Viewed by 2317

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Guest Editor
1. Institute of Electrical Engineering, Automation, Informatics and Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
2. Institute of Technology and Business in České Budějovice, Okružní 10, 370 01 České Budějovice, Czech Republic
Interests: advanced materials; mechanical properties; surface engineering; coatings; applied physics; modelling
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Special Issue Information

Dear Colleagues.

Thermal spraying technology enables the application and creation of metal, metal–ceramic, and ceramic coatings on all types of metal construction materials, regardless of the state of their heat treatment. For the application of thermal spraying, the chemical composition of the base material of the component to be coated and its heat treatment condition are not essential. Coatings cannot be applied only to parts with existing layers—for example, created in nitriding or chrome plating processes.

The purpose of applying spray coatings is to modify or restore functional areas with specific properties on machine parts while reducing production and operating costs. This technology can be used in primary production as well as in repairs and renovations (e.g., in the automotive field).

Coatings prepared by thermal spraying technologies are used in virtually all industries that place increased demands on quality and durability, i.e., in the automotive, aerospace, agricultural, engineering, and biomedical engineering sectors. Individual material properties such as hardness, breaking strength, ductility, and elasticity vary depending on the technology and spraying parameters. Coatings resistant especially to friction and corrosion are applied mainly to functional surfaces of machine parts, i.e., shafts, bearings, piston rods, blades of water turbines, harvesters, etc. Coatings resistant to high temperatures are applied to aircraft machine surfaces, high-performance turbines, and combustion chambers. Coatings resistant to electrical discharge are selected for bearings, pulleys, and contacts of heavy current breakers. Biocompatible coatings are highly appreciated on dental implants or orthopaedic implants, especially on implants of the heavily loaded knee and hip joints.

New solutions for surface finish, in particular, hard protective coatings, are currently being investigated in order to improve the properties of materials used in the most demanding applications. Most modern coatings require a guarantee of adequate quality, even after they have been applied.

Interest topics in the field:

  • Metal, metal–ceramic, and ceramic coatings in terms of novelty and benefit in basic and applied research, as well as in practice;
  • The identification of changes in mechanical properties of coatings due to wear in various applications using thermal spraying;
  • Physicomathematical methods as a means of simulating the coating formation based on the analysis of real technological processes applied under precisely defined conditions of thermal spraying;
  • Creation of predictive mathematical–physical models of thermal spraying, mainly based on identification of surface topography, adhesion, and stress–strain states of the interaction of the base material with the coating;
  • Intelligent thermal spray systems with an emphasis on optimizing and controlling production technology.

Assoc. Prof. Ing. Jan Valíček
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 spraying
  • mechanical properties
  • mathematical–physical models
  • surface topography
  • adhesion

Published Papers (1 paper)

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Research

17 pages, 3000 KiB  
Article
Milling of Complex Surfaces of EN 10060 Steel after HVOF Sprayed NiCrBSi Coatings
by Jan Valíček, Marta Harničárová, Jan Řehoř, Milena Kušnerová, Jaroslava Fulemová, Miroslav Gombár, Ludmila Kučerová, Jan Filipenský and Jan Hnátík
Coatings 2020, 10(8), 744; https://doi.org/10.3390/coatings10080744 - 30 Jul 2020
Cited by 2 | Viewed by 1800
Abstract
The high-velocity oxy-fuel spraying process was used to investigate and improve the surface properties of a workpiece. The research was focused on the spherical surface of a workpiece made of high-strength steel, a ball and socket assembly. After spraying with a nickel alloy, [...] Read more.
The high-velocity oxy-fuel spraying process was used to investigate and improve the surface properties of a workpiece. The research was focused on the spherical surface of a workpiece made of high-strength steel, a ball and socket assembly. After spraying with a nickel alloy, the surface was machined by milling. The coating was carried out as a process in which a very thin layer of coating of the required thickness and the required specific properties, i.e., high Vickers hardness, adhesion to the surface, wear resistance and other important characteristics, which must be respected in other machining methods, was applied to the already finished, heat-prepared metal substrate. This article deals with the milling of complex surfaces of steel substrate EN 10060 after spraying with NiCrBSi alloy. After spraying, a total of 15 milling experiments were performed in order to determine precisely the optimal cutting parameters of milling and surface adhesion, based on newly acquired prediction relations. The main presented results are new relations for the determination of optimal technological milling conditions based on the identification of adhesive sections using derived equations. The new relations were verified and also compared with the current literature in the field. Full article
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