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Current Updates in High-Entropy Alloys

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (20 April 2025) | Viewed by 448

Special Issue Editors


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Guest Editor
Pittsburgh Supercomputing Center, Pittsburgh, PA 15213, USA
Interests: ab initio electronic structure calculation methods; density functional theory; multiple scattering theory; high entropy alloys; electronic and spin transport calculations; dynamical mean field theory; high performance computing

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Guest Editor
Department of Physics and Astronomy, Middle Tennessee State University, Murfreesboro, TN 37132, USA
Interests: condensed matter theory; computational many-body physics; strongly correlated electrons; quantum criticality; disordered systems and localization; metal-Insulator transitions; superconductivity

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Guest Editor
Institute for Applied Physics, University of Science and Technology Beijing, Beijing 100083, China
Interests: materials physics; computer physics
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Special Issue Information

Dear Colleagues,

High-entropy alloys (HEAs) are alloys with five or more principal metallic elements, resulting in a large entropic contribution to free energy at high temperatures that stabilizes a single phase solid solution over potentially competing intermetallic compounds. Since their introduction in 2004, they have become a highly active area of both experimental and theoretical research due to the desirable functional and mechanical properties that HEAs may possess. More recently, the field of high-entropy materials has broadened to include different groups of nonmetallic elements. For example, “High-entropy oxides” (HEOs), referring to multicationic oxide systems, exhibit intriguing magnetic properties. In some cases, such HEO materials display extraordinary room temperature superior ionic conductivity that promises significant application in solid-state batteries. On the other hand, studying disordered semiconductors from the perspective of HEAs allows us fundamental insight into the structure–property relationships of these semiconductors. These high-entropy semiconductors serve as promising thermoelectric materials with the capability of generating electricity from temperature gradients.

In this Special Issue, we are interested in articles that explore the functional properties of high-entropy materials. Topics of interest will include, but need not be limited to:

  • Computational investigations of high-entropy alloys, including high-entropy oxides, semiconductors, and superconductors, employing a variety of techniques such as ab initio methods and machine learning;
  • The synthesis and characterization of the functional high-entropy alloys;
  • High-entropy alloys in electronics and energy applications.

Dr. Yang Wang
Dr. Hanna Terletska
Prof. Dr. Fuyang Tian
Guest Editors

Manuscript Submission Information

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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. Applied Sciences is an international peer-reviewed open access semimonthly 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 2400 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
  • high-entropy oxides
  • high-entropy semiconductors
  • high-entropy superconductors
  • electronic transport
  • phonon transport
  • thermoelectric materials

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Published Papers (1 paper)

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Research

15 pages, 1154 KiB  
Article
Development of a Partial Clustering Model of Alloy Viscosity
by Aristotel Issagulov, Astra Makasheva, Vitaliy Malyshev, Svetlana Kvon, Vitaliy Kulikov, Lazzat Bekbayeva and Saniya Arinova
Appl. Sci. 2025, 15(7), 3601; https://doi.org/10.3390/app15073601 - 25 Mar 2025
Viewed by 184
Abstract
The purpose of this paper is to obtain a partial clustering model of viscosity including the influence of clusters. This paper also establishes a quantitative correlation between the dynamic viscosity of alloys and temperature of liquidus in isotherms. The research methods are a [...] Read more.
The purpose of this paper is to obtain a partial clustering model of viscosity including the influence of clusters. This paper also establishes a quantitative correlation between the dynamic viscosity of alloys and temperature of liquidus in isotherms. The research methods are a theoretical substantiation of possibility of the isolated use of the Boltzmann distribution (energy spectrum) for the kinetic energy of the chaotic (thermal) motion and particle collisions as applied to a condensed state of matter. In this paper, the author’s concept of chaotic particles is applied to substantiate the existence of an energy class of particles present in the liquid in the form of clusters. The novelty of the paper is that it obtains a quantitative physical and mathematical model of temperature dependences of the dynamic viscosity based on destruction of clusters as the temperature increases. The mathematical model is compared with viscosity data from the state diagram, starting from the liquidus barrier. This approach was developed first and allows constructing viscosity isotherms based on the thermochemical initial data with extrapolation to the region of ultra-high temperatures. The proposed new model is verified in an example of a Cu-Sn alloy. The high correlation coefficient indicates the correctness of the derived equations and possibility of predicting the distribution of the viscosity of the alloy at high temperatures based on its state diagram. But the main fundamental novelty of the work is the discovery of the relationship between the activation energy of viscous flow and the barrier of randomization, which is present in the partial clustering model. The application of the new partial clustering viscosity model can be utilized across various fields involving fluid dynamics. In our study, the practical implementation of this novel partial clustering viscosity model will ensure the effective execution of metallurgical processes designed using these values at extremely high temperatures, determine optimal operating conditions, and provide more substantiated requirements for metal and alloy production technologies. Full article
(This article belongs to the Special Issue Current Updates in High-Entropy Alloys)
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