Персона: Михальчик, Владимир Валерьевич
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Владимир Валерьевич
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- ПубликацияТолько метаданныеSpecial aspects of uranium oxide non-stoichiometry measurement by thermogravimetric analysis(2020) Tenishev, A.; Kuzmin, R.; Matvenov, M.; Mikhalchik, V.; Shornikov, D.; Тенишев, Андрей Вадимович; Матвенов, Максим Евгеньевич; Михальчик, Владимир Валерьевич; Шорников, Дмитрий Павлович© Published under licence by IOP Publishing Ltd.Thermogravimetric analyses for determining uranium dioxide non-stoichiometry have been reviewed. Parameters of oxidation in air at various temperatures have been examined. The key parameters affecting accuracy of the obtained results have been evaluated. Oxidation parameters have been proposed, both for pure uranium dioxide as well as for uranium dioxide with added gadolinium oxide, which makes it possible to determine oxygen to metal (O/M) ratio with at least ±0.002 accuracy in weighed sample portions of approximately 3 g.
- ПубликацияТолько метаданныеDetermination of Density and Pore Size Distribution in Uranium Dioxide Fuel Pellet by Image Analysis of its Cross-Sectional Structure(2019) Devyatko, Yury N.; Khomyakov, Oleg V.; Tenishev, Andrey V.; Mikhalchik, Vladimir V.; Shornikov, Dmitry P.; Хомяков, Олег Владимирович; Тенишев, Андрей Вадимович; Михальчик, Владимир Валерьевич; Шорников, Дмитрий ПавловичThe paper proposes a method for reducing the true pore size in oxide nuclear fuel using a well-known histogram for the distribution of the pores cross sections across the polished section. It is shown that the problem of constructing a continuous pore size distribution function from the pore size distribution histogram is incorrect. Histograms showing pore distributions across the polished sections of oxide nuclear fuel sintered under various conditions are obtained. The Scheil-Saltykov method was used to reduce histograms for 3D pore size distributions in uranium oxide fuel.
- ПубликацияТолько метаданныеRegularities of Thermal Expansion of Cladding Tubes and Rods Made of E110opt Alloy within the Temperature Range of 273–1473 K (20–1200°C)(2021) Fedotov, P. V.; Kuznetsov, V. I.; Isaenkova, M. G.; Tenishev, A. V.; Perlovich, Y. A.; Stolbov, S. D.; Mikhalchik, V. V.; Novikov, V. V.; Исаенкова, Маргарита Геннадьевна; Тенишев, Андрей Вадимович; Михальчик, Владимир Валерьевич; Новиков, Владимир Владимирович© 2021, Pleiades Publishing, Ltd.Abstract: The regularities of the thermal expansion of cladding tubes and rods from the E110opt alloy, as well as the anisotropy of their thermal properties in the case of layer-by-layer texture inhomogeneity are studied. The thermal linear expansion coefficients (TLEC) of rods and cladding tubes were measured in the axial, radial and tangential directions during heating and cooling in the temperature range of 293–1473 K (20–1200°C). It is shown that as a result of α → β → α phase transformations in the samples, a stable texture of phase transformations is formed which is preserved during subsequent heating and cooling cycles. Analytical expressions are obtained that describe the temperature dependence of the thermal expansion coefficient in the first cycle of heating products from the E110opt alloy, taking into account possible α → β phase transformations and the resulting α-Zr crystal lattice deformation along the a and c axes. It was established that the presence of layer-by-layer inhomogeneity in the samples leads to the appearance of stresses between layers with different crystallographic textures and, as a result, affects the orientation dependence of phase transformations that are sensitive to the stress state in the material. The results obtained indicate the need to take into account the internal stresses arising in textured anisotropic materials during heating and cooling, and to separate the contributions of thermal expansion and plastic deformation when analyzing data from dilatometric measurements of sample sizes.
- ПубликацияТолько метаданныеHydrogen Solubility in Zirconium Alloys E110opt and E635(2022) Plyasov, A. A.; Tenishev, A. V.; Isaenkova, M. G.; Mikhalchik, V. V.; Fedotov, A. V.; Saburov, N. S.; Mikheev, E. N.; Тенишев, Андрей Вадимович; Исаенкова, Маргарита Геннадьевна; Михальчик, Владимир Валерьевич
- ПубликацияТолько метаданныеDifferential Scanning Calorimetry Determination of the Hydrogen Solubility in E110opt and E635 Zirconium Alloys(2022) Tenishev, A. V.; Petrov, M. I.; Isaenkova, M. G.; Mikhal’chik, V. V.; Fesenko, V. A.; Тенишев, Андрей Вадимович; Петров, Марк Игоревич; Исаенкова, Маргарита Геннадьевна; Михальчик, Владимир Валерьевич; Фесенко, Владимир Александрович
- ПубликацияТолько метаданныеEffect of the Stressed State on the Phase Transformations in Zirconium-Based Alloys(2022) Korotitskii, A. V.; Stolbov, S. D.; Isaenkova, M. G.; Tenishev, A. V.; Mikhal'chik, V. V.; Krymskaya, O. A.; Fesenko, V. A.; Исаенкова, Маргарита Геннадьевна; Тенишев, Андрей Вадимович; Михальчик, Владимир Валерьевич; Крымская, Ольга Александровна; Фесенко, Владимир Александрович© 2022, Pleiades Publishing, Ltd.Abstract: The crystallographic aspects of the phase transformations in zirconium alloys under compressive stresses are studied, and the changes in the sizes of cladding tubes, rods, and rings made of E110opt and E125 alloys at compressive stresses and without them are determined. The temperature of the onset of the phase transformation on heating is found to shift toward low temperatures under a load applied to a cladding tube ring in the diametral direction, and a noticeable strain leading to the appearance of ellipticity of the rings are detected. Some of the versions of the Burgers orientation relationship are operative during the reverse β‒α phase transformation under compressive stresses, which manifests itself in the suppression of growth of texture maxima in the applied load direction during cooling. Deformation is shown to be accelerated on heating in the two-phase α + β region under compressive stresses, and the parameters of high-temperature creep are calculated using the temperature dependences of the strain.