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Advanced Modification Methods to Improve the Performance of Thin Films and Coatings

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 6142

Special Issue Editor


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Guest Editor
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, Poland
Interests: surface functionalization; light-weight alloys; shape memory materials; hybrid coatings; anti-wear coatings; chemical vapour deposition; physical vapour deposition; immersion method; bioengineering
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Special Issue Information

Dear Colleagues,

Designing technologies, particularly those based on physicochemical processes, are an important part of current studies in the field of surface engineering of materials. In the case of constructional materials there is the growing need for novel surface strategies that assure increased wear resistance, a low friction coefficient, and biocompatibility. For instance, thin-layer deposition technologies allow for obtaining coatings on structural elements with complex shapes and simultaneously ensure that a coating will exhibit good adhesion to the substrate, as well as a homogeneous chemical composition and a precisely defined thickness on the entire surface. In this regard, technologies carried out in reduced pressure conditions involving physical phenomena and chemical reactions in plasma have excellent prospects. The latter processes can, on the one hand, improve the adhesion of obtained coverings and, on the other hand, enable achieving homogeneous layers with the required chemical composition. These methods enable as well obtaining not only simple, but also complex coatings with regards to their structure, phase composition, and diffusion layers. Such a functionalization can meet requirements for operating in the working conditions of a given structural element.

In view of the foregoing, we invite you to present your valuable research focused on perspective possibility to prepare the material surface as well as obtain an inter-layers of modified metallic, polymeric or ceramic substrates in the Special Issue of Materials entitled: “Advanced Modification Methods to Improve the Performance of Thin Films and Coatings”.

In particular, the topics of interest include, but are not limited to: (i) diffusion layers, (ii) plasma modified surfaces, (iii) heat-treatment methods, and (iv) pre-functionalization processes.

Dr. Karol Kyzioł
Guest Editor

Manuscript Submission Information

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Keywords

  • surface modification
  • chemical treatments
  • mechanical treatments
  • diffusion layers
  • functional coatings

Published Papers (3 papers)

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Research

12 pages, 3298 KiB  
Article
The Optical and Thermo-Optical Properties of Non-Stoichiometric Silicon Nitride Layers Obtained by the PECVD Method with Varying Levels of Nitrogen Content
by Stanisława Kluska, Maria Jurzecka-Szymacha, Natalia Nosidlak, Piotr Dulian and Janusz Jaglarz
Materials 2022, 15(6), 2260; https://doi.org/10.3390/ma15062260 - 18 Mar 2022
Cited by 6 | Viewed by 1989
Abstract
In this paper, we investigated the optical and thermo-optical properties of a-SiNx:H layers obtained using the PECVD technique. SiNx:H layers with different refractive indices were obtained from silane and ammonia as precursor gases. Surface morphology and chemical composition studies [...] Read more.
In this paper, we investigated the optical and thermo-optical properties of a-SiNx:H layers obtained using the PECVD technique. SiNx:H layers with different refractive indices were obtained from silane and ammonia as precursor gases. Surface morphology and chemical composition studies were investigated using atomic force microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and energy dispersive spectrometry methods. Spectroscopic ellipsometry was used to determine the optical indexes, thicknesses and optical bandgap of the films. The main purpose was to identify the thermo-optical characteristics of layers with different refractive indexes. Thermo-optical studies were performed to determine the temperature hysteresis of optical parameters. These measurements showed that after annealing up to 300 °C and subsequent cooling, the value of optical parameters returned to the initial values. Full article
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16 pages, 6473 KiB  
Article
The Effect of Annealing Temperatures on Selected Properties of WC/C Coatings, Deposited Using Hexacarbonyl Wolfram in an N2-SiH4 Atmosphere
by Peter Horňák, Daniel Kottfer, Karol Kyzioł, Marianna Trebuňová, Mária Kaňuchová, Lukasz Kaczmarek, Jozef Jasenák, Ján Hašuľ and Lukáš Rusinko
Materials 2021, 14(16), 4658; https://doi.org/10.3390/ma14164658 - 18 Aug 2021
Cited by 1 | Viewed by 1609
Abstract
In this paper, we present the results of an experimental study on WC/C coatings, deposited by using plasma-enhanced chemical vapor deposition in an N2-SiH4 atmosphere, annealed at temperatures of 200, 500 and 800 °C, in which the hexacarbonyl of W [...] Read more.
In this paper, we present the results of an experimental study on WC/C coatings, deposited by using plasma-enhanced chemical vapor deposition in an N2-SiH4 atmosphere, annealed at temperatures of 200, 500 and 800 °C, in which the hexacarbonyl of W was used as a precursor. During the experiments, the topography, chemical composition, morphology, as well as selected mechanical properties, such as hardness, Young’s modulus, and coefficient of friction of the WC/C coatings were analyzed. Annealing without the protective atmosphere in the mentioned temperatures caused a decrease in hardness (up to 15 ± 2.7 GPa). In addition, the coefficient of friction value increased only to 0.37 ± 0.03. Full article
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11 pages, 3994 KiB  
Article
Growth and Investigation of Annealing Effects on Ternary Cd1−xMgxO Nanocomposit Thin Films
by Khalid Bashir, Nasir Mehboob, Muhammad Ashraf, Abid Zaman, Fozia Sultana, Abdul Faheem Khan, Asad Ali, Muhammad Mushtaq, Sarir Uddin and Khaled Althubeiti
Materials 2021, 14(16), 4538; https://doi.org/10.3390/ma14164538 - 12 Aug 2021
Cited by 4 | Viewed by 1988
Abstract
Thin films of Cd1−xMgxO (CdMgO) (0 ≤ x ≤ 1) were investigated by depositing the films on glass substrates using the co-evaporation technique. The structural, surface morphological, optical, and electrical characteristics of these films were studied as a function [...] Read more.
Thin films of Cd1−xMgxO (CdMgO) (0 ≤ x ≤ 1) were investigated by depositing the films on glass substrates using the co-evaporation technique. The structural, surface morphological, optical, and electrical characteristics of these films were studied as a function of Mg content after annealing at 350 °C. The XRD analysis showed that the deposited films had an amorphous nature. The grain size of the films reduced as the Mg concentration increased, as evidenced by the surface morphology, and EDAX supported the existence of Mg content. It was observed that as the films were annealed, the transmittance of the CdMgO films saw an increase of up to 85%. The blue shift of the absorption edge was observed by the increase of Mg content, which was useful for enhancing the efficiency of solar cells. The optical band gap increased from 2.45 to 6.02 eV as the Mg content increased. With increased Mg content, the refractive index reduced from 2.49 to 1.735, and electrical resistivity increased from 535 Ω cm to 1.57 × 106 Ω cm. Full article
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