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Metals
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Multifunctional Hard Coatings on Metals
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Multifunctional Hard Coatings on Metals

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 5011

Special Issue Editors

Dr. Cheng-Hsun Hsu

E-Mail Website
Guest Editor
Department of Mechanical and Materials Engineering, Tatung University, Taipei 104, Taiwan
Interests: metals and alloys; heat treatment; coating and surface treatment; microstructure; mechanical property; wear and corrosion behavior; antibacterial materials
Dr. Jung-Ting Tsai

E-Mail Website
Co-Guest Editor
Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Interests: additive manufacturing; cold spray coating; composite materials; Non-Destructive Testing (NDT); Structural Health Monitoring (SHM); CFRP fabrication; polymer testing

Special Issue Information

Dear Colleagues,

Metals is launching a new Special Issue entitled “Multifunctional Hard Coatings on Metals”. The Special Issue will provide a platform for presenting the latest experimental and theoretical results in the innovative field of surface coatings on metals and alloys exhibiting excellent mechanical, wear, corrosion, and  antibacterial properties, and other unusual microstructural features. 

I am pleased to invite you to contribute an original or review article to this Special Issue.

Dr. Cheng-Hsun Hsu
Dr. Jung-Ting Tsai
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. Metals 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

  • coating and surface treatment
  • microstructure
  • mechanical property
  • wear and corrosion behavior
  • antibacterial materials

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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Research

13 pages, 3686 KiB  
Article
Hot Corrosion Behavior of Inconel 625 in Na2SO4 and V2O5 Molten Salt System
by Liang Li, Lanfeng Li, Guofeng Zhang, Hongdi Xue, Maomao Cui, Wenxu Wang and Dexue Liu
Metals 2023, 13(6), 1069; https://doi.org/10.3390/met13061069 - 2 Jun 2023
Cited by 3 | Viewed by 2111
Abstract
This study aimed to examine the corrosion behavior of Inconel 625 in a molten salt system of sodium sulfate and vanadium pentoxide at varying temperatures and durations. The corrosion products, microstructure, and element distribution of hot extruded Inconel in Na2SO4 [...] Read more.
This study aimed to examine the corrosion behavior of Inconel 625 in a molten salt system of sodium sulfate and vanadium pentoxide at varying temperatures and durations. The corrosion products, microstructure, and element distribution of hot extruded Inconel in Na2SO4 and V2O5 molten salt systems were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) analyses. This study demonstrates that corrosion of the alloy increases with time at a constant temperature. During the initial stage of corrosion, the surface of the alloy is primarily composed of a dense oxide layer consisting of Cr2O3 and NiO. However, after exposure to the salt bath for 24 h, a chemical reaction occurs between the alloy and vanadium (V), resulting in the formation of CrVO4 and Ni3V2O8. Furthermore, the intrusion of sulfur (S) element into the matrix leads to the formation of internal sulfides, including Ni-, Cr-, and Mo-based sulfides, which accelerate intergranular and intracrystalline corrosion. As the corrosion temperature rises, the surface microstructure of the corrosion layer transforms from powder to salt particles and then to massive particles. The corrosion products exhibit a clear stratification, while the alloy undergoes simultaneous oxidation and vulcanization processes. Full article
(This article belongs to the Special Issue Multifunctional Hard Coatings on Metals)
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14 pages, 5334 KiB  
Article
Wear and Corrosion Performance of Ti-6Al-4V Alloy Arc-Coated TiN/CrN Nano-Multilayer Film
by Cheng-Hsun Hsu, Chun-Yin Lin and Jian-Xun Chen
Metals 2023, 13(5), 907; https://doi.org/10.3390/met13050907 - 7 May 2023
Cited by 5 | Viewed by 1722
Abstract
The objective of this study was to investigate the effect of varying bias parameters (−50 V, −100 V, and −150 V) on the properties of TiN/CrN multilayer films deposited on Ti-6Al-4V alloy using the cathodic arc deposition (CAD) technique. The deposited films were [...] Read more.
The objective of this study was to investigate the effect of varying bias parameters (−50 V, −100 V, and −150 V) on the properties of TiN/CrN multilayer films deposited on Ti-6Al-4V alloy using the cathodic arc deposition (CAD) technique. The deposited films were characterized for their composition, structure, morphology, thickness, adhesion, and hardness. Wear and polarization tests were also conducted to determine the optimal bias condition for wear and corrosion resistance. The results showed that the TiN/CrN films possessed a nano-multilayered structure comprising TiN and CrN phases. The hard coating significantly increased the surface hardness of Ti-6Al-4V alloy up to three–five times. The coated specimens demonstrated superior wear resistance compared to the uncoated, with the −150 V specimen exhibiting the least wear rate. Furthermore, the −150 V specimen had the highest polarization impedance value, indicating the best corrosion resistance compared to the other bias conditions. In short, the use of CAD-coated TiN/CrN multilayer film enhanced the surface properties of Ti-6Al-4V alloy, with the best wear and corrosion resistance achieved at −150 V bias. These novel findings have significant implications for improving the performance and durability of Ti-6Al-4V alloy components in various industrial applications. Full article
(This article belongs to the Special Issue Multifunctional Hard Coatings on Metals)
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