High-Entropy Alloy Films and Coatings

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

Deadline for manuscript submissions: 31 July 2026 | Viewed by 2422

Special Issue Editors


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Guest Editor
Department of Metallurgy and Structural Integrity, Center for Research in Advanced Materials, Chihuahua 31136, Mexico
Interests: high-entropy alloys; Al-based alloys; metal matrix composite materials; microstructure–structure-mechanical properties relationships; powder metallurgy and casting
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Metallurgy and Structural Integrity, Center for Research in Advanced Materials, Chihuahua 31136, Mexico
Interests: metal matrix composite; aluminum alloys; high-entropy alloys; phase transformations; microstructure relation with mechanical properties
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A surface is a critical material component and can be associated with performances in industrial applications. Altering the composition and microstructure of a surface can considerably improve its qualities based on the service environment without impacting the bulk material's performance, thereby extending the equipment's service life. In this sense, high-entropy alloys comprise a new generation of materials with unique characteristics and properties, such as improved mechanical properties and superior resistance to corrosion and high temperatures. In addition, they have shown great potential in coating and film applications for demanding environments. In recent years, tremendous developments have been observed in the design and synthesis methods of high-entropy coatings and films, resulting in the microstructural evolution of these alloys and generating more versatile applications. However, this exciting field of coatings and films is still waiting to be explored by materials scientists and surface engineers. Thus, this Special Issue aims to strengthen the current understanding, design, synthesis, and development of such materials in order to provide a platform to combine high-quality research and innovative ideas and bridge the gap between fundamental research and technological applications, such as applications demanding high-performance protection in extreme conditions.

In particular, the topics of interest include but are not limited to the following:

  • High-entropy alloy films and coatings;
  • Film and coating technologies;
  • Composition design;
  • Synthesis and development;
  • Microstructure;
  • Mechanical Properties;
  • Technological applications.

Dr. Carlos G. Garay Reyes
Dr. Roberto Martínez Sánchez
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 250 words) can be sent to the Editorial Office for assessment.

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

  • high-entropy alloys
  • films
  • coatings
  • microstructure
  • mechanical properties.

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Published Papers (2 papers)

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Research

11 pages, 4620 KB  
Article
Effect of Pressure and Temperature on the Microstructure and Vickers Microhardness of the CoCrFeMnNiAl1.5 Alloy During Conventional Sintering and High-Frequency Induction Sintering
by Leonardo Baylón García, José Manuel Mendoza Duarte, Ivanovich Estrada Guel, Audel Santos Beltrán, Hansel Manuel Medrano Prieto, Gustavo Rodríguez Cabriales, Enrique Rocha Rangel, José Luis Hernández Rivera, Roberto Martínez Sánchez, Alfredo Martínez García and Carlos Gamaliel Garay Reyes
Coatings 2026, 16(3), 275; https://doi.org/10.3390/coatings16030275 - 26 Feb 2026
Viewed by 313
Abstract
This study evaluates the effects of sintering time and applied pressure on the microstructure and Vickers microhardness of the CoCrFeMnNiAl1.5 alloy during consolidation. Samples were obtained by mechanical alloying and consolidated using two routes: conventional sintering (CS) and high-frequency induction sintering followed [...] Read more.
This study evaluates the effects of sintering time and applied pressure on the microstructure and Vickers microhardness of the CoCrFeMnNiAl1.5 alloy during consolidation. Samples were obtained by mechanical alloying and consolidated using two routes: conventional sintering (CS) and high-frequency induction sintering followed by high-temperature heating (HFIHS + HTH). For both methods, the pressure (0.3–1.5 GPa) and holding time (1–4 h) were varied. The results show that the HFIHS + HTS route produces a finer microstructure, with notably more homogeneous Cr segregation at high pressures, resulting in higher Vickers hardness values (up to 770 HV). In addition, the pressure applied during HFIHS promotes a mechanism of forced atomic mobility. This mechanism facilitates the migration of atoms toward energetically favorable sites, such as grain boundaries. At the same time, it restricts precipitate growth and Cr-rich segregation and activates densification mechanisms without requiring sustained pressure. The optimal parameters (0.9 GPa and 1 h) produce the best microstructural and mechanical response, highlighting the potential of this alloy for use in coatings and structural components in the automotive and aerospace industries. Full article
(This article belongs to the Special Issue High-Entropy Alloy Films and Coatings)
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14 pages, 4315 KB  
Article
Study on Microstructure and Property Evolution of Heavily Deformed AlCoCrFeNi High Entropy Alloy at High Temperature
by Zhenyu Dou, Jingou Yin, Ming Wei, Baoguang Zhang, Jian Wang and Sujun Lu
Coatings 2025, 15(2), 128; https://doi.org/10.3390/coatings15020128 - 23 Jan 2025
Cited by 2 | Viewed by 1521
Abstract
High-temperature heat treatments can improve the element distributions and phase structures of AlCoCrFeNi high entropy alloys (HEAs). However, the long-term isothermal annealing at high temperatures will make the grains grow crazily. In this study, the problem of grain growth caused by high-temperature annealing [...] Read more.
High-temperature heat treatments can improve the element distributions and phase structures of AlCoCrFeNi high entropy alloys (HEAs). However, the long-term isothermal annealing at high temperatures will make the grains grow crazily. In this study, the problem of grain growth caused by high-temperature annealing at 1200 °C was solved by heavily deformed AlCoCrFeNi HEAs. The ultrafine grains formed by dynamic recrystallization will grow firstly during the subsequent annealing process, which inhibits the increase in the larger grains in the hot-extruded AlCoCrFeNi HEAs. The effect of high-temperature annealing on hot-extruded AlCoCrFeNi HEAs was also explored simultaneously in detail. After annealing at 1200 ℃ for 2 h, the compressive strength and fracture strain of the AlCoCrFeNi HEA reached an astonishing result of 3750 MPa and 43%, respectively. The results are attributed to the skeleton-liked FCC structures deeply interspersed into the grains and more importantly, the fine annealed grains which still maintained an average diameter of 20 μm. Additionally, the new nano-precipitates did not expand wildly at high temperatures either. Research on heavily deformed AlCoCrFeNi HEAs isothermally annealed at 1200 °C provides an available idea for further improving the properties of these HEAs. Full article
(This article belongs to the Special Issue High-Entropy Alloy Films and Coatings)
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