Tilda Publishing

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Tilda Publishing

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

2025, No. 1, CONTENTS

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Tilda Publishing

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

2025, No. 1, ABSTRACTS

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Electrical capacity of Al – C nanocomposites obtained by mechanical activation and short-pulse laser processing of powder materials

T. A. Pisareva, E. V. Kharanzhevskiy, S. M. Reshetnikov

Udmurt State University, 1 Universitetskya str., 426034 Izhevsk, Russia
E-mail: tatianaapisareva@gmail.com; eh@udsu.ru; smr41@mail.ru

The work investigates the possibility of obtaining the electrode material of supercondensers by mechanactivation and short-income laser processing of the Al – C system. After mechanical grinding, the obtained powder materials were subjected to short-pulse laser treatment on the surface of the substrate — aluminum foil. An increase in the concentration of graphite in the Al – C composite does not lead to an increase in specific capacity, which is associated with the content of graphite-like carbon located on the surface of the electrode. The obtained electrodes based on nanocomposite have a homogeneous porous structure with an average particle size of 20 microns and a specific surface of 31 m2/g. The analysis of the complex of modern research methods to determine the structural-phase composition showed that the mechanactivation and short-impulse laser processing of the Al – C system leads to the formation of aluminum and aluminum oxide, and the main part of the carbon on the electrodes is in a reduced state. X-ray diffraction analysis of the sintered layers reveals the appearance of crystalline aluminum carbide Al4C3. The maximum capacity of the electrodes of supercondensers from the material obtained corresponds to the composition of Al – 47 wt. % C – 12 wt. % Si and amounted to 23 F/g.

Keywords: supercapacitor, nanocomposite, mechanical activation, short-pulse laser treatment.

DOI: 10.30791/0015-3214-2025-1-5-17

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Investigation of the effect of electrolytic plasma treatment
on surface quality, structure and mechanical properties
of promising biomedical titanium alloys

S. A. Mikhlik^1, 2, S. V. Konushkin², M. A. Volchikhina^1, 2, M. A. Kaplan2,
A. D. Gorbenko², K. V. Sergienko², E. O. Nasakina², M. A. Sudarchikova²,
A. G. Kolmakov^1, 2, D. S. Artyugina¹, M. A. Sevostyanov 2

1 Bauman Moscow State Technical University,
5, p. 1, 2nd Baumanskaya str., 105005 Moscow, Russia
E-mail: mikhlik.sofia@yandex.ru; mashavolchihina2706@gmail.com; artyuginad03@bk.ru
2 Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Science (IMET RAS),
49 Leninsky prospect, 119334 Moscow, Russia
E-mail: venev.55@mail.ru; misha279@yandex.ru; shulf@yandex.ru; nacakina@mail.ru; mariahsudar@yandex.ru;
imetranlab10@mail.ru; cmakp@mail.ru

The results of the study of the effect of electrolytic plasma polishing (EPP) on the structure and chemical composition of surface layers, as well as the mechanical properties of wire samples of alloys 99,572 % Ti (VT1-00), Ti – 6 Al – 4 V (VT6), Nb 1, Ti – 26 at. % Nb and Ti – 23 at. % Nb – 5 at. % Zr with a diameter of 1.6 – 0.6 mm are presented. The removal of a largely defective surface layer in EPP leads to a decrease in roughness and strength indicators and an increase in plasticity. It is shown that EPP can be considered as a promising method of surface finishing of titanium alloys, especially new alloys of biomedical purpose Ti – 26 at. % Nb and Ti – 23 at. % Nb – 5 at. % Zr.

Keywords: biomedical alloy, microstructure, plasma electrolytic polishing, surface, niobium, titanium, electrolyte.

DOI: 10.30791/0015-3214-2025-1-18-32

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Structural and phase transformations in a copper-zinc coating
of the “brass” type applied by cold gas dynamic spraying

V. Е. Arkhipov, G. V. Moskvitin, М. S. Pugachev

Mechanical Engineering Research Institute of the Russian Academy of Sciences (IMASH RAN),
4 Maly Kharitonyevsky Pereulok, 101990 Moscow, Russia
E-mail: vearkhipov@mail.ru; gvmoskvitin@yandex.ru; pugachevmax@mail.ru

The paper considers the effect of the duration and temperature of gas-dynamic spraying of a mechanical mixture of Cu, Zn and Al2O3 particles on the phase composition of a copper-zinc coating of the “brass” type. It is shown that an increase in the deposition duration at 450 °C is accompanied by a significant decrease in the mass fraction of an electron-type solid solution based on Cu5Zn8 (γ-phase) from 33.0 % to 5.6 %, which is due to a significant increase in the size of the substructure of the coherent scattering region from 63.7 nm to 200 nm for zinc and from 89.8 nm to 200 nm for copper. An increase in the deposition temperature to 540 °C leads to a slight increase in the mass fraction of an electronic type solid solution based on CuZn3 (ε-phase) from 10.8 % to 12.9 % and the formation of a new phase — an electronic type solid solution based on CuZn (β′-phase) with a mass fraction of ≈ 1 %. The magnitude of microdeformations of copper and zinc increases significantly with an increase in the number of spraying cycles at an air flow temperature of 450 °C from 0.119 % to 0.166 % and from 0.004 % to 0.056 %, respectively. The formation of phases inherent in brasses is accompanied by a slight change in the size of the coherent scattering region in the ε-phase (86.5 nm and 71.1 nm) and an increase in it in the γ-phase from 62.0 nm to 200 nm and significant microdeformations up to 0.24 %.

Keywords: copper-zinc coatings, phase composition, parameters of gasdynamic sputtering, diffusion, structure, microdeformations, lattice parameters, transformations.

DOI: 10.30791/0015-3214-2025-1-33-43

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Effect of pretreatment temperature and activating agent concentration on structural characteristics of porous metal-carbon nanocomposites with FeCo bimetallic nanoparticles

A. A. Vasilev¹, E. L. Dzidziguri², D. V. Bindiug², D. G. Muratov¹, G. P. Karpacheva<sup>2

1</sup> Topchiev Institute of Petrochemical Synthesis of the Russian Academy of Sciences, 29 Leninsky prospect, 119991 Moscow, Russia
² National University of Science and Technology “MISiS”, 4 Leninsky prospect, 119049 Moscow, Russia
E-mail: raver.vasiljev@mail.ru; avrore@gmail.com; muratov@ips.ac.ru; gpk@ips.ac.ru

The methods for preparing metal-carbon nanocomposites based on a porous carbon support and dispersed bimetallic Fe–Co nanoparticles were proposed. The features of metal nanoparticle formation depending on the pretreatment temperature (150 and 600 °C) and the amount of alkali utilized as the activation agent were studied. It was shown that the alkaline activation of precursors precarbonized at 150 °C led to the formation of materials with a specific surface area of 973 – 1236 m2/g and highly aggregated metal nanoparticles in a carbon matrix. In contrast, composites prepared by alkaline activation of materials formed at 600 °C were characterized by a homogeneous distribution of nanoparticles and a specific surface area of 456 – 648 m2/g.

Keywords: metal-carbon nanocomposites, Fe–Co nanoparticles, chemical activation, chitosan, IR heating.

DOI: 10.30791/0015-3214-2025-1-44-60

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Thermal stability of the microstructure of rapidly solidified eutectic Al – Si alloy alloyed with metals

V. G. Shepelevich¹, O. V. Gusakova², S. V. Husakova<sup>1

1</sup> Belorusian State University (BSU), 4 Nezavisimosti Avenue, 220030 Minsk, Republic of Belarus
E-mail: Shepelevich@bsu.by; husakova@bsu.by
² International Sakharov Environmental Institute of Belorusian State University (ISEI BSU),
23/1 Dolgobrodskaya str., 220070 Minsk, Republic of Belarus
E-mail: ol.gusakova@gmail.com

The results of a study of the microstructure, elemental and phase composition of the eutectic alloy Al – 12.5 wt. % Si – 0.8 wt. % Mg – 0.4 wt. % Mn – 0.7 wt. % Fe – 0.9 wt. % Ni – 1.8 wt. % Cu during isochronous annealing at temperatures of 300, 400 and 500 °C for 1 hour are presented. It has been shown that annealing at a temperature of 300 °C does not lead to significant changes in the microstructure and phase composition of the foil. Increasing the annealing temperature to 400 °C causes enlargement of nanosized globular Si inclusions, as well as fragmentation and spheroidization of thin silicon plates. Using X-ray spectroscopy and X-Ray diffraction analysis, the formation of intermetallic inclusions Mg5Si6, Al17(NiFeMn)Si2, Al3Cu2 was established. The mechanism of diffusion processes leading to a change in phase composition is considered.

Keywords: silumin, magnesium, iron, manganese, nickel, copper, microstructure, phase composition, rapid solidification, isochronous annealing.ю

DOI: 10.30791/0015-3214-2025-1-61-72

ПЕРСПЕКТИВНЫЕ МАТЕРИАЛЫ

Ultra-high molecular weight polyethylene modification with ZnO/Ag nanoparticles for creation of photocatalytic membranes with high antibacterial activity

V. R. Chzhou, O. V. Bakina, M. I. Lerner

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences (ISPMS SB RAS),
2/4, pr. Akademicheskii, 634055 Tomsk, Russia
E-mail: chzhou.vr@ispms.ru; ovbakina@ispms.ru; lerner@ispms.ru

Nowadays photocatalytic membranes are considered the most effective system for water treatment. Chemically stable ultra-high molecular weight polyethylene (UHMPE) can be used as a polymer carrier for nanoparticles mobilization for photocatalytic membranes creation. As photocatalyst nanoparticles, the use of heterophase nanoparticles, such as zinc oxide/base metal, is promising. In the present work, UHMWPE@ZnO/Ag samples were prepared with nanoparticles content ranging from 1 to 7 wt. %. Nanoparticles with 12 wt. % silver content obtained by electrical explosion of wires in an oxygen-containing atmosphere were used for the modification. The study of the nanoparticles absorption spectra has shown that the creation of heterojunction allows to effectively shift the absorption band edge to the visible region of the spectrum (450 nm for the studied nanoparticles). The photochemical activity of the obtained samples was investigated at continuous supply of model dye Methylene blue through photocatalytic cell for 6 hours. The best results were obtained with the sample containing 5 wt. % nanoparticles, the highest photodegradation efficiency was achieved and the shape of the sample was preserved. Antibacterial activity of the samples was investigated against the culture of Staphylococcus aureus strain ATCC 6538-P according to the standard GOST R ISO 20743-2012. For all samples the suppression of bacterial growth was more than 98 %.

Keywords: ultra-high molecular weight polyethylene, photocatalysts, antibacterial activity, photocatalytic membranes.

DOI: 10.30791/0015-3214-2025-1-73-83