A. G. Fazlitdinova

Chelyabinsk State University

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V. A. Tyumentsev

Chelyabinsk State University

Dmitriy Bataev

Chelyabinsk State University

Maxim Ulyanov

Chelyabinsk State University

M. A. Orshulevich

Chelyabinsk State University

Sergey Taskaev

Chelyabinsk State University

M. V. Utarbekova

Chelyabinsk State University

Konstantin Skokov

Technical University of Darmstadt

D. Karpenkov

European Organization for Nuclear Research

Vladimir Khovaylo

National University of Science and Technology

СА

С. А. Подкопаев

Bauman Moscow State Technical University

Cooperative Institutions

Chelyabinsk State University

South Ural State University

Lomonosov Moscow State University

National University of Science and Technology

Russian Academy of Sciences

Moscow State University

Helmholtz-Zentrum Dresden-Rossendorf

A. N. Nesmeyanov Institute of Organoelement Compounds

Institute of Solid State Chemistry

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MAGNITOCALORIC EFFECT IN R3AL2 (R = GD, TB, DY, HO) ALLOYS

Челябинский физико-математический журнал (2024)

M. V. Utarbekova M. A. Orshulevich Dmitriy Bataev A. G. Fazlitdinova Sergey Taskaev

Experimental studies of magnetic and magnetocaloric properties of polycrystalline alloys Gd3Al2, Tb3Al2, Dy3Al2, Ho3Al2 in external magnetic fields up to 3 Tesla have been carried out, and the change of the magnetic part of entropy in high magnetic fields generated by superconducting magnetic systems has been calculated. Magnetic measurements have shown that these compounds have low coercivity and reach saturation in low fields. It is found that the magnetocaloric effect in the studied compounds is observed in a wide temperature range, and for the intermetallides Gd3Al2, Tb33Al2, Dy3Al2, Ho3Al2 has several existence regions comparable in the magnitude of the effect. The presence of several intervals of FEM existence is conditioned by a series of magnetic phase transitions in these ferrimagnetic compounds.

10.47475/2500-0101-2024-9-3-501-513

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Влияние температуры термомеханической обработки на гетерогенную структуру углеродного волокна

Журнал технической физики (2019)

В.А. Тюменцев A. G. Fazlitdinova С.А. Подкопаев

The change in the fine structure of carbon fibers with increasing temperature of thermomechanical treatment was studied by X-ray diffraction analysis. It is shown that the fiber material is heterogeneous, its component composition is determined by the modes of thermomechanical treatment, and also depends on the angle of the orientation of the coherent scattering regions relative to the fiber axis

Component (thermodynamics)

10.21883/jtf.2019.12.48483.429-18

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Особенности фазового превращения материала полиакрилонитрильной нити в структуру термостабилизированного волокна

A. G. Fazlitdinova В.А. Тюменцев

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Structural transformations of graphite during dispersion

Челябинский физико-математический журнал (2022)

A. G. Fazlitdinova V. A. Tyumentsev

10.47475/2500-0101-2022-17311

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X-Ray Diffraction Application for the Study of the Fine Structure of Carbon Fibers

Materials science forum (2016)

V. A. Tyumentsev A. G. Fazlitdinova

The fine structure of carbon fibers, obtained according to specific preparation techniques, has been studied. It has been shown that the fiber material is heterogeneous, its component composition is determined by thermomechanical treatment conditions and addition of boron; also it depends on the angle φ of coherent scattering domain orientation relative to the thread axis. The mean coherent scattering domain sizes increase in transition to the components corresponding to smaller d 002 values. Increase in temperature and duration of heat treatment, as well as the presence of a boron-containing additive, ensures formation of the components corresponding to smaller interplanar spacing d 002 values in the carbon material. The observed influence of temperature and duration of heat treatment, as well as the angle of coherent scattering domain orientation relative to the thread axis, upon the component composition makes it possible to assume that the process of carbon fiber material transformation into a state of greater stability presumably develops through a number of metastable stages.

Metastability

Small-angle X-ray scattering

10.4028/www.scientific.net/msf.845.243

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The effect of plastic deformation on magnetic and magnetocaloric properties of Gd-B alloys

Journal of Magnetism and Magnetic Materials (2017)

Sergey Taskaev Konstantin Skokov D. Karpenkov Vladimir Khovaylo Maxim Ulyanov

Magnetic refrigeration

10.1016/j.jmmm.2017.06.077

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Citations (19)

Structure of sp2-carbon fiber prepared by high-temperature thermomechanical treatment of polyacrylonitrile fiber: a Raman and X-ray diffraction study

Russian Chemical Bulletin (2018)

S. S. Bukalov L. A. Leites Alexander S. Goloveshkin V. A. Tyumentsev A. G. Fazlitdinova

Polyacrylonitrile

Carbon fibers

10.1007/s11172-018-2171-y

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Citations (9)

Magnetocaloric Effect of RCo5 (with R = Gd, Tb, Dy, and Ho) Alloys

The Physics of Metals and Metallography (2023)

M. V. Utarbekova M. A. Orshulevich Dmitry S. Bataev A. G. Fazlitdinova Sergey Taskaev

Magnetic refrigeration

10.1134/s0031918x2360152x

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Citations (2)

Influence of the isothermal treatment conditions on the phase transformation of the polyacrylonitrile yarn material into the structure of thermostabilized fiber

Russian Journal of Applied Chemistry (2014)

V. A. Tyumentsev A. G. Fazlitdinova E. A. Danilina

Polyacrylonitrile

Isothermal process

Texture (cosmology)

10.1134/s1070427214090249

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Corrosion of diffusion zinc coatings in neutral chloride solutions

International Journal of Corrosion and Scale Inhibition (2024)

A. Biryukov Dmitry Zakharyevich R. G. Galin T Batmanova Д. Е. Живулин

The corrosion behavior of the diffusion zinc coatings based on the δ-phase FeZn7-10 in a solution of 3 wt.%NaCl in water was studied using electrochemical and physicochemical methods.Initial corrosion of the coatings involves selective dissolution of zinc from the δ-phase.As exposure duration increases, both components of the coating alloy dissolve.The physicochemical nature and electrochemical properties of the corrosion product layer were studied under conditions of simultaneous dissolution of the coating components.Iron can accumulate in the layer of corrosion products during prolonged corrosion of the coatings.In this case, the chemical composition of the electrolyte near the electrode and the structural and phase state of the corrosion products change.After long-term corrosion, the layer of products consisted of zinc oxide and amorphous hydroxide compounds of zinc and iron.

10.17675/2305-6894-2024-13-1-17

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Citations (1)