Comparative Analysis of the Characteristics of Amorphous, Nanocrystalline, and Crystalline Membrane Alloys

Полухин, В. А.; Sidorov, N. I.; Курбанова, Э. Д.; Belyakova, R. M.

doi:10.1134/s0036029522080110

Russ. Metall.

2022

DOI: 10.1134/s0036029522080110

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Comparative Analysis of the Characteristics of Amorphous, Nanocrystalline, and Crystalline Membrane Alloys

В. А. Полухин

N. I. Sidorov

Э. Д. Курбанова

et al.

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Cited by 3 publications

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Multicomponent Alloys and Laminated Composite Nanomaterials for Hydrogen Technologies

Polukhin,

Estemirova,

Kurbanova

2023

Russ. Metall.

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Multicomponent Alloys and Laminated Composite Nanomaterials for Hydrogen Technologies

Polukhin,

Estemirova,

Kurbanova

2023

Russ. Metall.

View full text Add to dashboard Cite

Multicomponent Alloys and Layered Composite Nanomaterials for Hydrogen Technologies

Polukhin,

Estemirova,

Kurbanova

2023

Rasplavy

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The stability of high entropy alloys (HEA) is of great importance for various applications in many areas. This review covers one of the most topical areas in this area – the creation of stable multicomponent membrane alloys with improved performance. The review presents an analysis of the results of studies of equiatomic and non-equiatomic four- and five-component alloys, which are successfully used as membrane alloys for hydrogen technologies. An effective method for increasing the strength of membrane alloys is a special heat treatment, as a result of which secondary strengthening phases are precipitated and superlattices are formed. In addition, an unusual morphology of micrograins is formed in the form of cuboid blocks with rounded tops, spheroidal and ellipsoidal grains, consisting of hardening thermodynamically stable γ' and γ-phases isolated during heat treatment. Alloying is an important factor in strengthening HEAs. The influence of alloying with Ni or Cr on the mechanical properties of a number of multicomponent compositions has been analyzed. It is shown that Al + Ti or Al + Nb alloying pairs, structured into matrices of solid solutions of membrane alloys, increase their strength, thermal stability, hydrogen kinetics, and resistance to hydrogen embrittlement. Within the framework of molecular dynamics, the effect of strain hardening of membrane HEAs by multiple deformation has been studied and the mechanism for creating a synergistic effect has been established. The review also presents relatively recently obtained hexa- and pentagonal two-dimensional structures with ultrahigh strength and increased thermal stability and excellent photocatalytic properties, such as MX2 dichalcogenides and their pentagonal configurations, as well as two-dimensional alloys Cu1 – xNix, Ti1 – xNix and compounds Bi1 – xSbx. All these materials are effective catalysts for water dissociation and hydrogen concentration. Particular attention is paid to neural network prediction of interatomic potentials as an effective method of theoretical research for the search for new membrane HEAs.

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Controlled synthesis of nanoparticles of high-etropy materials. Optimization of traditional and creation of innovation strategies

Polukhin,

Estemirova

2024

Rasplavy

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In the last decade, the diversity of high-entropy materials (HEMs) has increased sharply, including due to the expansion of research into the field of amorphous, nano- and heterostructures. Interest in nanoscale HEMs is primarily associated with their potential application in various fields, such as renewable and green energy, catalysis, hydrogen storage, surface protection and others. The development of nanotechnology has made it possible to develop an innovative design of nanoscale HEMs with fundamentally new structures with unique physical and chemical properties. Problems of controlled synthesis with precisely specified parameters of chemical composition, microstructure and morphology are solved. At the same time, traditional technologies such as fast pyrolysis, mechanical alloying, magnetron sputtering, electrochemical synthesis, etc. are being modernized. Along with this, innovative synthesis technologies have appeared, such as carbothermic shock, the method of controlled hydrogen spillover. The review discusses various methods for the synthesis of nanoscale HEMs that have been developed in the last few 6–7 years for various applications. Some of them are modernization of traditional methods for producing HEM or nano-sized materials, while another group of techniques represents innovative solutions stimulated and inspired by the HEM phenomenon.

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Comparative Analysis of the Characteristics of Amorphous, Nanocrystalline, and Crystalline Membrane Alloys

Cited by 3 publications

References 105 publications

Multicomponent Alloys and Laminated Composite Nanomaterials for Hydrogen Technologies

Multicomponent Alloys and Laminated Composite Nanomaterials for Hydrogen Technologies

Multicomponent Alloys and Layered Composite Nanomaterials for Hydrogen Technologies

Controlled synthesis of nanoparticles of high-etropy materials. Optimization of traditional and creation of innovation strategies

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