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Coatings
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Hard Transition Metal Compound Coatings with Increased Flexibility
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Hard Transition Metal Compound Coatings with Increased Flexibility

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 5224

Special Issue Editors

Dr. Tomasz Mościcki

E-Mail Website
Guest Editor
Department of Experimental Mechanics, Institute of Fundamental Technological Research, Polish Academy of Science, Pawinskiego 5 B St., 02-106 Warsaw, Poland
Interests: magnetron sputtering; materials science of thin films and coatings (hard wear-resistant, heat-resistant, low-friction, tribological coatings, etc.); transition metal ceramics (borides, carbides, etc.)
Special Issues, Collections and Topics in MDPI journals
Dr. Justyna Chrzanowska-Giżyńska

E-Mail Website
Guest Editor
Department of Experimental Mechanics, Institute of Fundamental Technological Reseach Polish Academy of Science, Pawinskiego 5 B st., 02-106 Warsaw, Poland
Interests: superhard coatings; PVD structures; magnetron sputtering; pulsed laser ablation; mechanical properties of thin coatings; graphite nanostructures

Special Issue Information

Dear Colleagues,

Recent theoretical and experimental developments in multifunctional coatings as single or multilayered are among the most highly-exploited research systems in the field of material science and engineering of the flexible coatings which are simultaneously hard, tough, and resistant to cracking in bending. The thermal stability and oxidation resistance of the nanocomposite coatings at temperatures above 1000 °C are also very important. Spurred primarily by durability in demanding environmental conditions required by current applications ranging from aerospace and the automotive and tool industries to machining technologies. Driven by the current state of knowledge of hardening mechanisms, the structure of new materials and nanocomposites, and also the need to maintain structural material integrity, durability and reliability assets under harsh environments have become a huge demand on experimental, theoretical, and modeling activities.

Meeting these requirements are a relatively new class of materials with the potential to be used for many different applications ranging from superconductivity to wear and corrosion resistance: transition metal compounds, i.e., borides, oxides, carbides, and nitrides. Among them, coatings with tungsten, titanium, tantalum, and other metals from this group deserve special attention.

This scope of this Special Issue will serve as a forum for papers in the following concepts:

  • Theoretical and experimental research, knowledge, and new ideas in hard coatings with enhanced toughness and increased resistance to cracking.
  • Experiments with and processing of thermally stable films, protecting the substrate against oxidation in high temperature coatings.
  • The formation of single or multilayers composed of nano-bilayers with the aim to increase flexibility and adhesion to substrate.
  • High-rate deposition of simultaneous hardness, toughness, and resistance to cracking in bending coatings.
  • Coatings produced by different vacuum processes, including but not limited to magnetron sputtering, laser and plasma processing, CVD and also PVD hybrid method, etc.
  • Computer modeling, experimenting, and processing to predict coating properties, performance, durability, and reliability in service environments.

Dr. Tomasz Mościcki
Dr. Justyna Chrzanowska-Giżyńska
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. 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

  • plasma coatings
  • ceramic wear resistant coatings
  • flexible superhard coatings
  • vacuum coatings
  • protective coatings
  • transition metal ceramics

Published Papers (2 papers)

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Research

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15 pages, 3765 KiB  
Article
Properties of Spark Plasma Sintered Compacts and Magnetron Sputtered Coatings Made from Cr, Mo, Re and Zr Alloyed Tungsten Diboride
by Tomasz Mościcki, Rafał Psiuk, Joanna Radziejewska, Maria Wiśniewska and Dariusz Garbiec
Coatings 2021, 11(11), 1378; https://doi.org/10.3390/coatings11111378 - 10 Nov 2021
Cited by 6 | Viewed by 1822
Abstract
To enhance the properties of tungsten diboride, we have synthesized and characterized solid solutions of this material with chromium, molybdenum, rhenium and zirconium. The obtained materials were subsequently deposited as coatings. Various concentrations of these transition metal elements, ranging from 0.0 to 24.0 [...] Read more.
To enhance the properties of tungsten diboride, we have synthesized and characterized solid solutions of this material with chromium, molybdenum, rhenium and zirconium. The obtained materials were subsequently deposited as coatings. Various concentrations of these transition metal elements, ranging from 0.0 to 24.0 at.%, on a metals basis, were made. Spark plasma sintering was used to synthesize these refractory compounds from the pure elements. Elemental and phase purity of both samples (sintered compacts and coatings) were examined using energy dispersive X-ray spectroscopy and X-ray diffraction. Microindentation was utilized to measure the Vickers hardness. X-ray diffraction results indicate that the solubility limit is below 8 at.% for Mo, Re and Zr and below 16 at.% for Cr. Above this limit both diborides (W,TM)B2 are created. Addition of transition metals caused decrease of density and increase of hardness and electrical conductivity of sintered compacts. Deposited coatings W1−xTMxBy (TM = Cr, Mo, Re, Zr; x = 0.2; y = 1.7–2) are homogenous, smooth and hard. The maximal hardness was measured for W-Cr-B films and under the load of 10 g was 50.4 ± 4.7 GPa. Deposited films possess relatively high fracture toughness and for WB2 coatings alloyed with zirconium it is K1c = 2.11 MPa m1/2. Full article
(This article belongs to the Special Issue Hard Transition Metal Compound Coatings with Increased Flexibility)
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Review

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22 pages, 3765 KiB  
Review
Potential Applications of Geopolymer Cement-Based Composite as Self-Cleaning Coating: A Review
by Siti Norsaffirah Zailan, Norsuria Mahmed, Mohd Mustafa Al Bakri Abdullah, Shayfull Zamree Abd Rahim, Dewi Suriyani Che Halin, Andrei Victor Sandu, Petrica Vizureanu and Zarina Yahya
Coatings 2022, 12(2), 133; https://doi.org/10.3390/coatings12020133 - 24 Jan 2022
Cited by 23 | Viewed by 4395
Abstract
Nowadays, concepts of self-cleaning have received great attention in construction building materials. Self-cleaning with the presence of photocatalyst has been applied in building materials to overcome the problem of building surfaces becoming dirty after exposure for a long time in highly polluted areas. [...] Read more.
Nowadays, concepts of self-cleaning have received great attention in construction building materials. Self-cleaning with the presence of photocatalyst has been applied in building materials to overcome the problem of building surfaces becoming dirty after exposure for a long time in highly polluted areas. To date, the concept of green blending materials has led to the development of a new binding material for green materials, which is geopolymer with an addition of photocatalyst. This review focused on the development of conventional self-cleaning paste, including the method of preparation and the impact of adding photocatalyst on physical and mechanical properties. However, although self-cleaning has been widely applied in conventional cement paste, its applications in geopolymers are still in the early stages of development and require more research. Therefore, this paper also intended to review the current knowledge on properties of geopolymer cement-based composite and its potential to be applied as a self-cleaning coating. Full article
(This article belongs to the Special Issue Hard Transition Metal Compound Coatings with Increased Flexibility)
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