DEVELOPMENT OF COMPOSITE COPPER-MAGNESIUM CONDUCTORS

There were developed techniques to obtain high-strength Cu-Mg composite wires. Hydrostatic extrusion method was used to obtain the Cu-Mg composite wire with lots of magnesium fibers. Also there were conducted experiments to acquire a composite wire from the mixture of copper and magnesium powders. Electrical and mechanical properties of this composites were investigated.Работа выполнена в рамках государственного задания ФАНО России (тема «Деформация», № 01201463327)

STRUCTURE AND PROPERTIES OF Cu/Mg COMPOSITES

The composite Cu/Mg conductors were obtained by hydroextrusion. The microstructure was studied, the strength properties, density and resistivity of Cu/Mg composites were measured. The results show that as the amount of magnesium fibers in the copper matrix increases, the conductivity remains at a high level. It has been established that an increase in the amount of magnesium fibers positively affects the strength properties of composites.Работа выполнена в рамках государственного задания ФАНО России (тема "Давление") и при финансовой поддержке проекта УрО РАН №18-10-2-24

DEVELOPMENT OF HIGH STRENGTH COMPOSITE WIRES BASED ON CU-MG

Разработаны технологии по получению высокопрочных композитных проводов на основе Cu–Mg. Методом гидроэкструзии сформирован композитный провод с большим количеством волокон магния. Проведены эксперименты по получению композитного провода Cu–Mg путем введения смеси из порошков меди и магния. Исследована микроструктура полученных композитов. Проведены измерения электрических и механических свойств.The techniques to obtain high-strength Cu–Mg composite wires were developed. Hydrostatic extrusion method was used to obtain the Cu–Mg composite wire with lots of magnesium fibers. Also the experiments to acquire a composite wire from the mixture of copper and magnesium powders were conducted. The microstructure of obtained composites was investigated. The electrical and mechanical properties were measured.Работа выполнена в рамках государственного задания ФАНО России (тема «Деформация», № 01201463327)

STRUCTURE AND PROPERTIES OF TRIPLE ALUMINUM-COPPER-MAGNESIUM COMPOSITES

Ternary composites based on Al, Cu and Mg were obtained by hydrostatic extrusion. To analyze the influence of the interfaces, composites with different layer sequences were studied. The microstructure, mechanical and electrical properties of composites were investigated.Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта №19-33-90005

STRUCTURE AND PHYSICO-MECHANICAL PROPERTIES OF THE TERNARY Cu/Al/Mg-COMPOSITE

Ternary composite based on Cu-Al-Mg was obtained by hydroextrusion. To analyze the effect of interfaces on the properties of a composite, specimens with different heat treatments were studied. The mechanical and electrical properties of the composites have been studied.Работа выполнена в рамках государственного задания Минобрнауки РФ “Давление” № 122021000032-5

Abnormally high strength and low electrical resistivity of the deformed Cu/Mg-composite with a big number of Mg-filaments

Cu/Mg-composites, the copper matrix of which contains 1, 7 and 2730 magnesium filaments, were obtained by hyrdoextrusion at room temperature. The structure, mechanical and electrical properties of the deformed composite rods and thin wires were investigated. The yield strength and electrical resistivity were theoretically calculated and these estimations were compared with the experimental results. The XRD-method allowed discovering a change of the lattice constant of the Cu-matrix under deformation of the composites. It has been concluded that, under severe plastic deformation, a supersaturated Cu-based solid solution forms on the Cu/Mg-interface. As a result, the strength of the deformed Cu/Mg-composite with minimal volume fraction but maximal surface area of magnesium is abnormally high. A thick Cu-sleeve provides low electrical resistivity of this Cu/Mg-composite. The obtained results can be used for the development of high-strength Cu-based conductors. © 2019 The AuthorsUral Branch, Russian Academy of Sciences, UB RASThe work was carried out in the framework of a state task according to the theme ?Pressure? No. AAAA-A18-118020190104-3. The studies of structure and mechanical properties of the samples were carried out at the Electron Microscopy Department and Mechanical Test Department of the Collective-Use Center of the Institute of Metal Physics (Ural Branch, Russian Academy of Sciences). The X-ray diffraction studies were carried out in the ?Composition of Compounds? Center of Collaborative Access, Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences

Effect of Hydrostatic Pressure on Subsequent Development of Seedlings of Medicinal Plants

We investigated the effect of hydrostatic pressure pretreatment in the range from 10 to 200 MPa on Glycyrrhiza uralensis Fish. and Silybum marianum (L.) Gaertn seeds. The aim of the study is to improve the sowing of seeds and achieve possible positive changes in plants development.Исследование выполнено за счет гранта Российского научного фонда № 22-26-00346, https://rscf.ru/project/22-26-00346/

Quality Control of Radiotherapy for Determining the Absorbed Dose Rate in Various Environments for the Gamma Therapeutic Device Terabalt

This article presents the results of determining the absorbed dose rate in water for the gamma therapeutic device Terabalt in the Center of Nuclear Medicine and Oncology in Semey.Авторы выражают признательность руководству и сотрудникам Центра Ядерной Медицины и Онкологии города Семей (Республика Казахстан) за оказанную помощь при проведении исследования и подготовки данного материала. Авторы выражают благодарность Департамент технического сотрудничества, Международное агентство по атомной энергии за предоставленную возможность проведения данной работы

STRUCTURE AND PROPERTIES OF BINARY COMPOSITES CU/MG

Cu/Mg-binary composites were obtained. The structure, mechanical and electrical properties of composites were investigated. With increasing of Mg-fibers and deformation value, the Cu-peaks change its position towards to higher angles. A Cu-based solid solution is formed at the interface of Cu/Mg.Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта №19-33-90005