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Coatings
Special Issues
Coating Technologies Involving Surface Adsorption and Diffusion
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Coating Technologies Involving Surface Adsorption and Diffusion

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

Deadline for manuscript submissions: 30 July 2024 | Viewed by 2786

Special Issue Editors

Dr. Yang Yang

E-Mail Website
Guest Editor
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Ministry of Education), Anhui University of Technology, Maanshan 243002, China
Interests: diamond-like-carbon films; high entropy coatings; MAX phase coatings; thermal spray; nitriding; first-principles calculations; wear resistance; corrosion resistance
Special Issues, Collections and Topics in MDPI journals
Dr. Chengsong Zhang

E-Mail Website
Guest Editor
Faculty of Metal Materials Department, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
Interests: metal heat treatment; surface modification; computational materials science
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Many single (e.g., thermochemical treatments and film deposition) and composite coating technologies involve the process of surface adsorption and diffusion. Studying the scientific problems in this process is key to optimizing coating technology, improving coating properties and revealing various mechanisms, as well as being helpful in the design of composite coatings.

The aim of this Special Issue is to present the latest experimental and calculated developments in this field, through a combination of letters, research papers and review articles. It welcomes experimental investigations, simulations and modelling (first-principles calculations, molecular dynamics, etc.) of the physicochemical properties of coating technologies involving surface adsorption and diffusion. In particular, the topics of interest include, but are not limited to, the following:

  • Carburizing/carbonitriding/nitriding/nitrocarburizing;
  • Other thermochemical treatments;
  • Film deposition and related surface science;
  • Duplex treatments combining thermochemical treatment and film deposition;
  • Modeling of the adsorption and diffusion process.

Dr. Yang Yang
Dr. Chengsong Zhang
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

  • thermal chemical treatment
  • film deposition
  • duplex treatment
  • adsorption
  • diffusion
  • microstructure
  • surface properties
  • first-principles calculations

Published Papers (3 papers)

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Research

12 pages, 3620 KiB  
Article
In-Depth Understanding of the Chemical Stripping Mechanism of AlSiY Coatings on Nickel Superalloys by First-Principles Calculation
by Hongying Li, Chaoyong Luo, Ce Zhang, Lei Wu, Xiaolong Zhou, Chengsong Zhang, Yang Wang and Zhiwu Wang
Coatings 2024, 14(1), 135; https://doi.org/10.3390/coatings14010135 - 19 Jan 2024
Viewed by 634
Abstract
In order to repair a failed AlSiY coating on aeroengine turbine components, the AlSiY coating was stripped using a nitric acid-based removal reagent. The homogeneity of chemical stripping was evaluated and the stripping mechanism was clarified using first-principles calculations. The effects of hydrofluoric [...] Read more.
In order to repair a failed AlSiY coating on aeroengine turbine components, the AlSiY coating was stripped using a nitric acid-based removal reagent. The homogeneity of chemical stripping was evaluated and the stripping mechanism was clarified using first-principles calculations. The effects of hydrofluoric acid (HF) and chromium trioxide (CrO3) on the homogeneity of chemical stripping were investigated by calculating the electronic work functions (EWFs) of the stripped surfaces. The results showed that the stripped surfaces of the AlSiY coating exhibited a serrated appearance when it was etched by a single nitric acid solution, indicating severely inhomogeneous stripping. With the addition of HF and/or CrO3, the homogeneity of chemical stripping could be greatly improved, which was attributed to the increased EWF of the (200) surface and the decreased EWF of the (110) surface, causing the corrosion cathode to transition from the (110) surface to the (200) surface. The HF+CrO3+HNO3 mixed reagent was the optimal combination for the uniform stripping of the AlSiY coating, while the inner layer was not broken. The Al atoms on the surface could be preferentially removed due to the strong bonding with acid ions. The research method proposed in the present work will provide a new means to design chemical removal reagents. Full article
(This article belongs to the Special Issue Coating Technologies Involving Surface Adsorption and Diffusion)
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16 pages, 9256 KiB  
Article
High-Efficient Gas Nitridation of AISI 316L Austenitic Stainless Steel by a Novel Critical Temperature Nitriding Process
by Daodong Tang, Chengsong Zhang, Haoting Zhan, Wenao Huang, Zongkai Ding, Dazhi Chen and Guodong Cui
Coatings 2023, 13(10), 1708; https://doi.org/10.3390/coatings13101708 - 28 Sep 2023
Cited by 3 | Viewed by 1069
Abstract
To improve the surface properties of austenitic stainless steels, a thick S-phase layer was prepared by using a novel critical temperature nitriding (CTN) process. The properties of the thick S-phase layer were optimized by controlling the process parameters. The microstructures and phase compositions [...] Read more.
To improve the surface properties of austenitic stainless steels, a thick S-phase layer was prepared by using a novel critical temperature nitriding (CTN) process. The properties of the thick S-phase layer were optimized by controlling the process parameters. The microstructures and phase compositions of CTN-treated layers were characterized by the optical microscope, scanning electron microscope and X-ray diffraction, respectively. The surface properties, including corrosion and wear resistance, were systematically investigated by the electrochemical workstation, micro-hardness tester and ball-on-disk tribometer, respectively. The results showed that a thick S-phase layer with a thickness of 18 to 25 μm can be fabricated in a short time by critical temperature nitriding, which represented higher efficiency than conventional low-temperature nitriding. Although the most top surfaces of CTN-treated layers contain massive iron nitrides, there are no precipitates in the inner nitrided layer. The electronic work function calculated by first-principles method has confirmed that those iron nitrides had a slight influence on the corrosion resistance of nitrided layers. The optimized CTN-treated layer exhibited a comparable corrosion resistance and wear resistance as the low-temperature nitrided layer. The CTN process is considered a potentially highly efficient surface modification method for austenitic stainless steels. Full article
(This article belongs to the Special Issue Coating Technologies Involving Surface Adsorption and Diffusion)
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13 pages, 8179 KiB  
Article
Improvement of the Mechanical Properties of 30CrNi2MoVA through Ultrasonic-Milling in Certain Key Components
by Dan Liu, Yalin Shen, Erliang Wang, Hongjin Wang, Jianbin Liu, Kaizheng Wang and Jianhang Sun
Coatings 2023, 13(9), 1626; https://doi.org/10.3390/coatings13091626 - 16 Sep 2023
Cited by 1 | Viewed by 786
Abstract
To improve the fatigue life of the key component and the surface properties of the 30CrNi2MoVA steel material, advanced ultrasonic-milling composite superficial treatment was performed. The microstructure, surface roughness, friction and wear performance, surface hardness, fatigue life and environmental experiments of the steel [...] Read more.
To improve the fatigue life of the key component and the surface properties of the 30CrNi2MoVA steel material, advanced ultrasonic-milling composite superficial treatment was performed. The microstructure, surface roughness, friction and wear performance, surface hardness, fatigue life and environmental experiments of the steel with and without ultrasonic-milling have been carried out in detail. In comparison with those of the traditional dry cutting, the results show that the surface roughness of the samples after the advanced ultrasonic-milling surface modification fluctuates about 0.32 μm, and the surface hardness is increased by about 40% compared with the matrix hardness, and the fatigue life of the pump head connection shaft has been increased by more than 11 times. Advanced ultrasonic-milling surface modification technology can increase the local residual compressive stress and wear resistance on the material surface, which can make the material have better surface properties. Full article
(This article belongs to the Special Issue Coating Technologies Involving Surface Adsorption and Diffusion)
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