Вестник НЯЦ РК 1(93) 2023

Махдипур, Мамун Медрадж Нанесено покрытие WC-10Co-4Cr методами HVOF и HVAF, изучены его микроструктура и свойства. Это считалось одним из основных микроструктурных различий между методами HVAF и HVOF, а также наличием значительного количества расплавленного материала вокруг частично расплавленных частиц WC в покрытии HVOF, см. Для стали Х12МФ основными механизмами изнашивания были: пластическая деформация и окисление, а для покрытия WC-10Co-4Cr — экструзионная деформация и абразивный износ при нагрузках 30 и 50 Н.

Не будем забывать, что в данной работе авторы провели исследования с различными системами осаждения HVOF, используя семь различных порошков WC-Co и WC-Co-Cr. Кроме того, покрытие WC/Co-Cr было более твердым, имело более низкий коэффициент трения и меньшую пористость по сравнению с покрытием WC/Cr3C2/Ni. В аналогичном исследовании [57] анализировались свойства эрозионного износа образцов подложек SS304, покрытых WC-10Co-4Cr и Ni-20Cr2O3.

Однако по литературным данным можно сказать, что модели формирования структурно-фазовых состояний HVOF-покрытий на основе WC-10Co-4Cr недостаточно изучены. По твердости, износостойкости и микроструктуре покрытия WC-Co-Cr были сопоставимы с покрытиями WC-Co, но коррозионная стойкость WCCo-Cr была значительно выше. Напыленное покрытие WC/Co-Cr имело лучшую коррозионную стойкость, чем покрытие WC/Cr3C2/Ni при 3,5 мас.%.

Поэтому авторы данной статьи полагают, что за счет совершенствования системы HVOF, выбора оптимальных методов и состава порошков можно улучшить трибологические и коррозионные свойства покрытий WC-Co-Cr и использовать их для продления срока службы задвижек. .

Formation of HEA

A schematic illustration of the effect of lattice distortion on the intensity of X-ray diffraction peaks is shown in Figure 2. A similar phenomenon is observed in the distortion of the crystal lattice, leading to the distortion of atomic planes. Schematic illustration of the effect of lattice distortion and temperature on the intensity of the XRD peaks [36].

In HEA, the potential energy between the nodes of the crystal lattice varies due to the heterogeneity of the atoms. In [40], the calculation of the activation energy of the diffusion of elements in different CoCrFeMnNi HEA matrices is presented. Fluctuations in interatomic bond potential energy are known to affect the kinetics and activation energy of diffusion.

Both the atoms of the individual elements and the phases formed contribute to the properties of HEA, which is the "cocktail" effect. In addition to the properties of the individual elements, the interaction between the constituent elements should also be considered.

Thermodynamics of HEA

Changes in temperature are known to affect the oscillations of atoms; as the temperature increases, the amplitude of the oscillations increases, leading to a decrease in the intensity of the reflected X-rays [37-39]. Depending on the composition, method of production and processing of the alloy in HEA, ordered and disordered solid solution phases are formed. The increase in strength of AlxCoCrCuFeNi alloys is due to the formation of a solid BCC phase and a stronger cohesive bond between Al and other elements.

For pure elements, the entropy depends only on the vibrational (thermal) motion of the atoms. The required parameter for mismatch between the atomic radii of the elements for the formation of a solid solution agrees well with the Hume-Rothery rule. Then in [63] it was proposed to introduce an additional thermodynamic parameter Ω, to predict the formation of the HEA structure.

It is assumed that local lattice distortions caused by the addition of elements can lead to lattice instability of the solid solution, hence the formation of other phases. It has been shown that the VEC can be used to quantitatively predict the phase stability of the FCC and BCC phases in the HEA.

Figure 4. Entropy of mixing of alloys with the equiatomic ratio depending on the number of components [49]

Methods for the preparation of HEA powders

Laser coating provides a metallurgical bond strength between the coating and the substrate, which is higher than that of the thermal spray method. The coatings consisted of FCC, BCC and Laves phases due to the high entropy effect. In MS, the main parameters affecting the coating properties are the target composition, the bias voltage and the gas flow rate.

In [113] the results of the research on FeCrNiTiZrAl coating obtained by MS, the coating properties are not inferior to those of high-entropy equiatomic alloys. In [120], the use of the pulsed electrochemical deposition method successfully led to the synthesis of thin films of the highly entropic CoCrFeMnNi alloy. The uniform solid solution structure of FCC type was identified by X-ray diffraction analysis.

Alloy design strategies and future trends in high entropy alloys / Yeh J-W // The journal of the Minerals, Metals & Materials Society. Thermodynamic analysis of a simple microstructure of a high-entropy AlCrFeNiCu alloy with several main elements / A. DEVELOPMENT OF SOFTWARE FOR THE HEATER CONTROL SUBSYSTEM AND LIQUID SODIUM PARAMETER MONITORING SUBSYSTEM OF THE EAGLE TEST STAGE.

As a result of the data analysis, the use of a multifactorial experimental method was revealed. In each failure case, individual and general conclusions were made about the refrigerator processes. Peaceful nuclear explosions on the territory of Kazakhstan / С.А. Development of measures to limit the negative impacts of the "Atomic" lake on the population and the environment / S.B. al.] // Journal of Environmental Radioactivity.

Development of measures to limit negative impacts of the «Atomic» lake on population and environment / S.B. al.] // Journal of Environmental Radioactivity. ASSESSMENT OF DOSE LOADS FOR DIFFERENT BEHAVIORAL SCENARIOS IN THE TERRITORY OF THE "ATOMIC LAKE". In this regard, the calculation of the radiation dose received by a person on the "Atomic Lake" under conditions of high radiation is relevant.

Opportunities for Advanced Ceramics and Composites in the Nuclear Sector // Journal of the American Ceramic Society. Irradiation response of Al2O3-ZrO2 ceramic composite under He ion irradiation // Journal of the European Ceramic Society.

Излучение в межэлектродном промежутке Для синхронизации сигналов с фотодетекторов с

Атомарные линии

Молекулярные полосы и непрерывный спектр

A system for the extraction and transport of light radiation from the radiation chamber and protective box of the INURA accelerator was developed. The system was tested during the registration of light radiation from the interelectrode gap of the diode assembly. Hydrogen atom and oxygen atom lines associated with the decay of absorbed water vapor and discharge across the dielectric surface at the anode of the high-current accelerating diode are registered.

Studies of behavior of the fuel compound based on the U-Zr micro-heterogeneous quasialloy during cyclic thermal tests // Journal of Physics: Conference Series. Mukhame-diyev Methods of studying power density distribution in the IVG.1M research reactor after conversion // Applied radiation and isotopes. Before the commissioning of the IVG.1M reactor with low-enriched uranium fuel, experimental studies of reactor properties were carried out on physical and energy start-ups, which should confirm the results of preliminary calculation studies and the operability of the reactor.

This article is devoted to the study of the axial and radial energy release profile in the IVG.M reactor fuel assemblies using in-reactor dosimetry techniques. Assessment of the distribution of tritium in the vegetation cover in the areas of underground nuclear explosions at the Semipalatinsk test site / Ye. Characteristics of radioactive soil contamination in places of underground nuclear tests in the Semipalatinsk test site / P.

Определение фоновых концентраций трития (HTO, TFWT и OBT) в почве и растениях Онтарио, Канада / Ким С.Б., Бредлоу М., Руссель Х., Бонд М., Стюарт М. Определение путей миграции техногенных радионуклидов за пределы территории Балапан-испытательный полигон / С. Романенко [и др.] // Актуальные вопросы радиоэкологии Казахстана / Институт радиационной безопасности и экологии РГП НЯЦ РК. Определение фоновых концентраций трития (HTO, TFWT и OBT) в почве и растениях Онтарио, Канада / Ким С.Б., Бредлоу М., Руссель Х., Бонд М., Стюарт М. Выявление путей миграции техногенных радионуклидов за пределы исследовательской площадки «Бала-пан» / С. Романен-ко [и др.] //Актуальные вопросы радиоэкологии Казахстана / Ин-т радиационной безопасности и экологии РГП НЯЦ РК. ИЗУЧЕНИЕ РАСТИТЕЛЬНОГО ПОКРОВА И СОДЕРЖАНИЯ ТРИТИЯ НА ОБЪЕКТЕ «ЛАЗУРИТ» СЕМИПАЛАТИНСКОГО ПОЛИГОНА.

The paper presents the characteristics of the plant cover at the 'Lazurit' object, including the content of tritium (3Н): tissue-free water tritium (TFWT) and organically bound tritium (OBT). The content of OBT in the plant cover of the study area was found to be insignificant and in most cases below the detection limit of the methodological instrumentation used. The results of research on the application of the method of measurement of gross alpha, beta activity in water using the liquid scintillation counter (LSC) Quantulus 1220 are presented.

Testing and validation of the technique was performed on model solutions with different concentrations and compositions of alpha and beta emitters, as well as by participating in interlaboratory comparisons. The results showed that the use of LSS allows for a sufficiently fast and accurate estimation of the gross alpha and beta activity in water below the regulated limits without the use of labour-intensive sample preparation.