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Coatings
Special Issues
High-Temperature Protective Coatings
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High-Temperature Protective Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: 30 December 2024 | Viewed by 2073

Special Issue Editors

Dr. Jinlong Wang

E-Mail Website
Guest Editor
Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China
Interests: high-temperature oxidation; high-temperature protective coatings; hot corrosion
Dr. Zehao Chen

E-Mail Website
Guest Editor Assistant
Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China
Interests: high-temperature oxidation; high-temperature protective coatings; hot corrosion

Special Issue Information

Dear Colleagues,

The oxidation resistance of high-temperature alloys is often limited at elevated temperatures, leading to issues such as peeling and failure after prolonged service. Applying high-temperature coatings can significantly improve the oxidation resistance of alloys and provide long-term reliability for high-temperature components. Numerous surface protection methods, including metal and non-metal coatings, can provide long-term reliable protection. The protective mechanisms and degradation behavior of these coatings have been a hot topic in the field of high-temperature protective coating research.

In this Special Issue, recent advances in advanced coatings and surface treatments for high-temperature applications in power industries are elaborated. In particular, topics of interest include, but are not limited to, the following:

  • Research on oxidation resistance mechanisms;
  • High-performance protective coatings;
  • Studies on coating degradation mechanisms;
  • Advanced metal/non-metal coatings;
  • The design of coating composition and structure.

Dr. Jinlong Wang
Guest Editor

Dr. Zehao Chen
Guest Editor Assistant

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

  • oxidation
  • superalloy
  • high-temperature protective coatings
  • high-temperature organic silicon coating
  • high-temperature inorganic silicon coating
  • thermal barrier coatings (TBC)

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Published Papers (2 papers)

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Research

20 pages, 20027 KiB  
Article
First Principles Calculation of the Influence of Alloying on the Phase Stability, Elasticity, and Thermodynamic Properties of the MoNbTiVX (X = Al/Cr) Refractory High-Entropy Alloy
by Lin Chen, Weijun Li, Weihe Shi, Liuqing Liang, Jinghui Sun, Chengchu Yin, Jiafei Yi, Xuming Zhang, Peilin Qing, Alin Cao, Xiaowei Zhang and Hongxi Liu
Coatings 2024, 14(11), 1399; https://doi.org/10.3390/coatings14111399 - 4 Nov 2024
Viewed by 840
Abstract
In response to the poor wear resistance and high-temperature oxidation resistance of titanium alloys during service, a series of lightweight refractory high-entropy alloys (RHEAs) can be designed for the laser cladding coating of titanium alloy surfaces, with due consideration of the compositional and [...] Read more.
In response to the poor wear resistance and high-temperature oxidation resistance of titanium alloys during service, a series of lightweight refractory high-entropy alloys (RHEAs) can be designed for the laser cladding coating of titanium alloy surfaces, with due consideration of the compositional and structural characteristics of titanium alloys. Firstly, the structural stability, mechanical and thermal properties of four lightweight RHEAs (MoNbTiV, AlMoNbTiW, CrMoNbTiV, and AlCrMoNbTiV) with equal atomic ratios were designed and calculated using first principles combined with quasi-harmonic approximation (QHA). The results indicate that all four RHEAs are stable BCC, exhibiting elastic anisotropy and ductility. The lightest density is 6.409 g/cm3. Adding Al/Cr can cause structural distortion and affect its mechanical properties. Their Young’s moduli are in the following order: AlCrMoNbTiV > MoNbTiV > CrMoNbTiV > AlMoNbTiV. The thermal expansion coefficients of the four RHEAs and titanium alloys are very close, with a difference in linear expansion coefficient of less than 1.16 × 10−5/K. Meanwhile, the metallurgical bonding of four types of RHEA coatings was successfully achieved on a Ti-6Al-4V(TC4) substrate through laser cladding technology, and all coatings exhibited a unique BCC solid solution phase. Full article
(This article belongs to the Special Issue High-Temperature Protective Coatings)
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19 pages, 10073 KiB  
Article
Predictive Modeling and Optimization of Layer-Cladded Ti-Al-Nb-Zr High-Entropy Alloys Using Machine Learning
by Ruirui Dai, Hua Guo, Jianying Liu, Marco Alfano, Junfeng Yuan and Zhiqiang Zhao
Coatings 2024, 14(10), 1319; https://doi.org/10.3390/coatings14101319 - 16 Oct 2024
Viewed by 819
Abstract
In this work, the influence of laser power (LP), scanning speed (SS), and powder feeding speed (PF) on the porosity, dilution, and microhardness of lightweight refractory high-entropy alloy (RHEA) coatings produced via laser cladding (LC) was investigated. Variance analysis (ANOVA) was deployed to [...] Read more.
In this work, the influence of laser power (LP), scanning speed (SS), and powder feeding speed (PF) on the porosity, dilution, and microhardness of lightweight refractory high-entropy alloy (RHEA) coatings produced via laser cladding (LC) was investigated. Variance analysis (ANOVA) was deployed to ascertain the effect of LP, SS, and PF on performance metrics such as porosity, dilution, and microhardness. The Non-dominated Sorting Genetic Algorithm II (NSGA-II) was then applied to optimize these processing parameters to minimize porosity, achieve suitable dilution, and maximize microhardness, enhancing the mechanical properties of RHEA coatings. Finally, machine learning models—Random Forest (RF), Gradient Boosting Decision Tree (GBDT), and Genetic Algorithm-enhanced GBDT (GA-GBDT)—were developed using orthogonal experimental data, with GA-GBDT demonstrating superior predictive accuracy. The proposed approach integrates statistical analysis and advanced ML techniques, providing a better understanding into optimizing LP, SS, and PF for improved RHEA coatings performance in industrial applications, thereby advancing laser cladding technology. Full article
(This article belongs to the Special Issue High-Temperature Protective Coatings)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

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