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Регулярный выпуск 12 (3) 2022
The chemical composition and adjustment of pH value of the simulated body fluid exert a significant effect on the susceptibility of the alloy ZK60 to stress corrosion cracking

The effect of testing conditions on stress corrosion cracking of biodegradable magnesium alloy ZK60

The chemical composition and adjustment of pH value of the simulated body fluid exert a significant effect on the susceptibility of the alloy ZK60 to stress corrosion cracking
E.D. Merson, V.A. Poluyanov, P.N. Myagkikh, D.L. Merson, A.Y. Vinogradov
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 177-183


Thermoelectric materials are designed according to thermoelectric characteristics, which require good agreement with the Zeebeck coefficient, electronic conductivity, and thermal conductivity. This paper is presented the comparative data of thermal properties in five compounds of nanocrystalline copper sulfides KxCu1.85S (0<x <0.05) at the temperature zone from 300 K to 700 K. X-ray phase analysis shows a mixture different phases of copper sulfides such as Сu1.85S cubic phase, Cu2S cubic phase, Cu17S9 (Cu1.89S) rhombohedral phase, Cu2S tetragonal phase  in all investigated compounds at room temperature. The sizes of crystallites in the alloys estimated from half-width of X-ray lines are in range from 24 to 90 nm. The thermal conductivity of alloys decreases to 0.2 ÷ 0.6 W K-1m-1 in temperature range of 350 – 700 K due to increasing of the amount of potassium (for x = 0.04, 0.05). This guides the maximum thermoelectric characteristics of the material. The obtained results are important for semiconductor materials used in the field of thermoelectric devices.

Thermal properties of nanocrystalline copper sulfides KxCu1.85S (0 < x < 0.05)

Thermoelectric materials are designed according to thermoelectric characteristics, which require good agreement with the Zeebeck coefficient, electronic conductivity, and thermal conductivity. This paper is presented the comparative data of thermal properties in five compounds of nanocrystalline copper sulfides KxCu1.85S (0<x <0.05) at the temperature zone from 300 K to 700 K. X-ray phase analysis shows a mixture different phases of copper sulfides such as Сu1.85S cubic phase, Cu2S cubic phase, Cu17S9 (Cu1.89S) rhombohedral phase, Cu2S tetragonal phase in all investigated compounds at room temperature. The sizes of crystallites in the alloys estimated from half-width of X-ray lines are in range from 24 to 90 nm. The thermal conductivity of alloys decreases to 0.2 ÷ 0.6 W K-1m-1 in temperature range of 350 – 700 K due to increasing of the amount of potassium (for x = 0.04, 0.05). This guides the maximum thermoelectric characteristics of the material. The obtained results are important for semiconductor materials used in the field of thermoelectric devices.
K.A. Kuterbekov, M.K. Balapanov, M.M. Kubenova, R.S. Palymbetov, R.K. Ishembetov, S.M. Sakhabayeva, A.M. Kabyshev, B.M. Akhmetgaliev, K.Z. Bekmyrza, Y.T. Abseitov, S.G. Giniyatova
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 191-196


Typical view of the "Torque - angle of twist" diagrams during the torsion test of specimens with a diameter of 3 mm made from magnesium alloy Mg-Zn-Ca after annealing (1) and after ECAP (2)

Strength and fracture mechanism of a magnesium alloy for medical applications after equal-channel angular pressing

Typical view of the "Torque - angle of twist" diagrams during the torsion test of specimens with a diameter of 3 mm made from magnesium alloy Mg-Zn-Ca after annealing (1) and after ECAP (2)
G.V. Klevtsov, R.Z. Valiev, N.A. Klevtsova, M.V. Fesenyuk, O.B. Kulaysova, I.N. Pigaleva
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 203-208

the studies carried out show that by varying the nature of the solvent, the concentration and nature of the polymers in the initial solutions, it is possible to control the structure formation in mixed polymer solutions, and, therefore, the properties of the resulting composites.

Experimental evaluation of structure formation in solutions of biopolymer mixtures and prediction of the properties for biomedical materials obtained

the studies carried out show that by varying the nature of the solvent, the concentration and nature of the polymers in the initial solutions, it is possible to control the structure formation in mixed polymer solutions, and, therefore, the properties of the resulting composites.
A.S. Shurshina, V.V. Chernova, M.Yu. Lazdina, A.S. Titlova, E.I. Kulish
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 209-213

The figure shows a model used in a model experiment to study the interaction of modified boron-containing nanotubes with a carbon dioxide molecule

Sensory properties of carbon nanotubes containing impurity boron atoms

The figure shows a model used in a model experiment to study the interaction of modified boron-containing nanotubes with a carbon dioxide molecule
S.V. Boroznin, I.V. Zaporotskova
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SEM image of hybrid five-layered composite based on steel and aluminium alloy with interlayers of basalt fiber-reinforced polymer.

Adhesive and impact strength of hybrid layered metal-polymer composites reinforced by basalt fiber

SEM image of hybrid five-layered composite based on steel and aluminium alloy with interlayers of basalt fiber-reinforced polymer.
S.V. Kuteneva, S.V. Gladkovsky, D.I. Vichuzhanin, P.V. Kosmachev, P.D. Nedzvetsky
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 225-230

Terbium oxide nanopowder with an average particle size of 13 nm and a record high content of magnetoactive Tb3+ ions was successfully synthesized for the first time by laser ablation of solid target in Ar gas flow

Synthesis of Tb2O3 nanoparticles by laser ablation in Ar gas flow

Terbium oxide nanopowder with an average particle size of 13 nm and a record high content of magnetoactive Tb3+ ions was successfully synthesized for the first time by laser ablation of solid target in Ar gas flow
R.N. Maksimov, V.V. Platonov, A.S. Yurovskikh, V.A. Shitov, V.V. Osipov
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 231-236

The energy dispersive analysis showed an increase in the chromium concentration in the coating with an increase in the chromium oxide content in the electrode materials. With an increase in the concentration of Cr2O3 in the coatings, the friction coefficient and wear rate were decreased.

Formation of electric spark WC-Co coatings with modifying Cr2O3 additives

The energy dispersive analysis showed an increase in the chromium concentration in the coating with an increase in the chromium oxide content in the electrode materials. With an increase in the concentration of Cr2O3 in the coatings, the friction coefficient and wear rate were decreased.
A.A. Burkov, L.A. Konevtsov, V.K. Khe
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 237-242


The mechanism of formation of the cellular crystallization structure consists in the occurrence of combined thermocapillary,
concentration-capillary, evaporative-capillary and thermoelectric instability

Modeling the mechanism of micro / nanostructured surface formation in Al-Co-Cr-Fe-Ni and Co-Cr-Fe-Mn-Ni high-entropy alloys treated with a high current pulsed electron beam

The mechanism of formation of the cellular crystallization structure consists in the occurrence of combined thermocapillary, concentration-capillary, evaporative-capillary and thermoelectric instability
S.A. Nevskii, V.D. Sarychev, S.V. Konovalov, K.A. Osintsev, Y.F. Ivanov, I.A. Panchenko, V.E. Gromov
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 249-254

Friction stir processing mode (ω = 2000 rpm, ν = 8 mm/min) and hardening T6 heat treatment were developed, which makes it possible to achieve the formation of a monolithic defect-free structure in the AK12D (Al–12.8Si–1.67Cu–1.03Ni–0.84Mg–0.33Mn–0.23Co–0.24Fe) alloy with a high level of mechanical properties.

Surface hardening of an Al-Si-Cu-Ni-Mg aluminum alloy by friction stir processing and T6 heat treatment

Friction stir processing mode (ω = 2000 rpm, ν = 8 mm/min) and hardening T6 heat treatment were developed, which makes it possible to achieve the formation of a monolithic defect-free structure in the AK12D (Al–12.8Si–1.67Cu–1.03Ni–0.84Mg–0.33Mn–0.23Co–0.24Fe) alloy with a high level of mechanical properties.
G.R. Khalikova, G.R. Zakirova, A.I. Farkhutdinov, E.A. Korznikova, V.G. Trifonov
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 255-260

The method of confocal laser scanning microscopy (CLSM) has demonstrated significantly higher sensitivity for assessing of corrosion damages than standard gravimetric method. 
Moreover, the CLSM method has enabled to obtain the quantitative assessment of average corrosion rate, as well as localized one.

On the quantitative assessment of corrosion damages of aluminum at the early stages using confocal laser scanning microscopy

The method of confocal laser scanning microscopy (CLSM) has demonstrated significantly higher sensitivity for assessing of corrosion damages than standard gravimetric method. Moreover, the CLSM method has enabled to obtain the quantitative assessment of average corrosion rate, as well as localized one.
V.A. Danilov, D.L. Merson
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Год: 2022 Том: 12     Выпуск: 3 Стр.: 261-265