Персона: Бородако, Кирилл Анатольевич
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Кирилл Анатольевич
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- ПубликацияОткрытый доступApplication of laser radiation for creation of metamaterial based on rapidly quenched shape memory TiNiCu alloy(2020) Sitnikov, N. N.; Irzhak, A. V.; Tabachkova, N. Yu.; Koledov, V. V.; Borodako, K. A.; Shelyakov, A. V.; Ivanov, A. A.; Бородако, Кирилл Анатольевич; Шеляков, Александр Васильевич; Иванов, Андрей Анатольевич© 2020 IOP Publishing Ltd.The work deals with application of laser radiation for creation of metamaterial - layered structural composite based on rapidly quenched TiNiCu thin ribbon. Structural properties of the composite were examined by transmission and scanning electron microscopy. Considerable two-way shape memory effect was achieved and studied.
- ПубликацияОткрытый доступFormation of structure of TiNiCu alloys with high copper content upon producing by planar flow casting(2020) Shelyakov, A. V.; Sevryukov, O. N.; Sitnikov, N. N.; Borodako, K. A.; Khabibullina, I. A.; Шеляков, Александр Васильевич; Севрюков, Олег Николаевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич© Published under licence by IOP Publishing Ltd.The rapidly quenched alloys of the quasibinary intermetallic TiNi-TiCu system with a high copper content (more than 25 at.%) are of great interest as shape memory materials due to the possibility of a significant decrease in the temperature and deformation hysteresis in comparison with the binary TiNi alloy. To obtain alloys with a copper content of 25 to 40 at.%, the planar flow casting technique was used. The alloys were fabricated at a melt cooling rate of about 106 K/s in the form of ribbons 30-50 µm thick and wide in the range from 7 to 20 mm. The study of the structure of the alloys was carried out using X-ray diffraction analysis, scanning and transmission electron microscopy. It was shown that from the ribbon side, contacting the quenching wheel, all alloys are amorphous, while on the non-contact side of the ribbons of alloys with 25 and 30 at.% Cu, a thin surface crystalline layer with a B2 structure is observed. Using energy dispersive X-ray spectroscopy, it was found that the content of the alloy components in the amorphous and crystalline phases coincides.
- ПубликацияТолько метаданныеDesign of microgrippers based on amorphous-crystalline TiNiCu alloy with two-way shape memory(2020) Shelyakov, A.; Sitnikov, N.; Borodako, K.; Koledov, V.; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Бородако, Кирилл АнатольевичFunctional layered composites of the shape memory alloys are recently recognized as promising basic active element for microsystem technology and microrobotics. Amorphous-crystalline TiNiCu alloy ribbons at around 40 mu m of thickness with an interface separating the amorphous and crystalline phases into layers were produced by melt spinning technique. It is shown that a decrease in the cooling rate of the melt from 8.9 center dot 10(5) to 4.2 center dot 10(5) K/s leads to an increase in the thickness of the crystalline layer from 2 to 10 mu m. The ratio of the thicknesses of the amorphous d(am) and crystalline d(cr) layers was also varied by an electrochemical polishing method. The composite ribbons have exhibited the two-way shape memory effect (TWSME) of thermal induced bending deformation without additional thermomechanical training. It was established that when the ratio d(cr)/d(am) is changed from 0.06 to 0.35, the minimum bending radius of the ribbon decreases from 37.1 to 6.3 mm, and the maximum reversible strain increases by 0.05% to 0.27%. The minimum time of the shape recovery of the composite ribbons when heated by an electric current pulse was 14 ms, and the force generated by the ribbon with a length of 3 mm in bending reached 1.2 mN. A series of the microgrippers (microtweezers) were fabricated on the basis of the composite ribbons with TWSME. Complete technological process of manipulating graphite filaments with a diameter of 5 to 25 mu m using developed microgrippers was demonstrated.
- ПубликацияТолько метаданныеTwo-Way Shape Memory Effect in Rapidly-Quenched High-Copper TiNiCu Alloys Deformed in the Martensitic State(2020) Shelyakov, A. V.; Sitnikov, N. N.; Borodako, K. A.; Sevryukov, O. N.; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич; Севрюков, Олег Николаевич© 2020, Pleiades Publishing, Ltd.Abstract: The effect of martensitic deformation on the two-way shape-memory effect (SME) of quasi-binary high-copper TiNi–TiCu alloys (with 25–40 at % Cu) is studied. The alloys are prepared by rapid quenching from the melt in an amorphous state in the form of ribbons 30–50 μm in thickness. The alloys crystallize during isothermal annealing, the time of which is varied from 100 to 300 s, and during a single current pulse 10 ms in duration. The relatively low bending strains (1.5–3%) are shown to cause two-way SME in TiNiCu alloys; as the strain of martensite increases, the reversible strain in the martensitic transformation range increases markedly. An increase in the copper content is found to cause a substantial decrease in the value of two-way SME, which is related to the formation of the brittle TiCu phase. At the same time, a decrease in the heat treatment time causes an increase in the reversible strain, which reaches the maximum value (2.35%) for the alloy with 25 at % Cu subjected to high-rate electric pulse treatment.
- ПубликацияОткрытый доступВлияниe механических нагрузок на сверхпроводящие свойства ВТСП лент и сборок(НИЯУ МИФИ, 2024) Бородако, К. А.; Осипов, М. А.; Покровский, С. В.; Абин, Д. А.; Веселова, С. В.; Стариковский, А. С.; Руднев, И. А.; Руднев, Игорь Анатольевич; Стариковский, Александр Сергеевич; Осипов, Максим Андреевич; Покровский, Сергей Владимирович; Веселова, Светлана Владимировна; Абин, Дмитрий Александрович; Бородако, Кирилл АнатольевичПроведено исследование деформационной стойкости высокотемпературных сверхпроводящих (ВТСП) лент при различных параметрах деформации. С помощью четырехконтактного метода измерялся критический ток в образцах, деформированных на инденторах диаметрами 5–20 мм растягивающими усилиями до 200 Н. Исследованы повреждения сверхпроводящего слоя и локальные сверхпроводящие свойства подвергнутых механическим воздействиям образцов при помощи сканирующей электронной микроскопии и сканирующей Холловской магнитометрии.
- ПубликацияТолько метаданныеInfluence of copper content and thermal treatment on shape memory effect in rapidly quenched TiNiCu alloys(2021) Borodako, K. A.; Shelyakov, A. V.; Sitnikov, N. N.; Zaletova, I. A.; Sevryukov, O. N.; Бородако, Кирилл Анатольевич; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Севрюков, Олег Николаевич© 2021 Institute of Physics Publishing. All rights reserved.Amorphous alloys of the TiNi - TiCu system with a copper content of 25 to 40 at.% were prepared by planar flow casting at a melt cooling rate of 106 K/s. Crystallization of the alloys was carried out by isothermal annealing and by action of single electric pulse with a duration of 5 ms. Shape memory behavior and structure of the alloys was investigated by means of bending tests and X-ray phase analysis. It was found that increasing the copper content to above 30 at.% considerably reduces the plasticity and shape memory effect of the alloys. However, abrupt decreasing the annealing duration significantly improves the shape memory performance due to prevention of the formation of brittle Ti-Cu phases in the alloys structure.
- ПубликацияТолько метаданныеLocal atomic and crystal structure of rapidly quenched TiNiCu shape memory alloys with high copper content(2021) Veligzhanin, A.; Sundeev, R.; Chernysheva, O.; Shelyakov, A.; Sitnikov, N.; Borodako, K.; Чернышева, Ольга Викторовна; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич© 2020 Elsevier B.V.This study aims to reveal features of the local crystal structure and environment in the quasi-binary TiNi–TiCu alloys containing 25–40 at.% Cu, by X-ray diffraction and EXAFS spectroscopy. The alloys were produced in an amorphous state by the melt-spinning technique and then crystallised by isothermal and electropulsing treatment. It was shown that Ni local structure is more disordered in comparison with Cu local environment, which is closer to the conventional crystallographic structure. An increase in the Cu content resulted in the magnification of the disordering in the nearest local environment, around both the Ni and Cu atoms, consisting of Ti atoms. No noticeable effect of the annealing rate on the local structure was found.
- ПубликацияТолько метаданныеShape memory behavior of rapidly quenched high-copper tinicu alloys(2021) Shelyakov, A.; Sitnikov, N.; Khabibullina, I.; Borodako, K.; Sevryukov, O.; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич; Севрюков, Олег Николаевич© 2021, Universidade do Porto - Faculdade de Engenharia. All rights reserved.Rapidly quenched quasibinary TiNi–TiCu system alloys with high copper contents (above 20 at.%) exhibit excellent shape memory effect and have considerably narrower hysteresis as compared with the TiNi binary alloy, this advantage being of special importance for cyclic load applications, e.g. for microelectromechanics (MEMS). The aim of this work is to study the effect of annealing parameters and copper content on the shape memory effect in TiNiCu alloys. Thin amorphous ribbons of TiNi-TiCu alloys with copper contents of 25 to 40 at.% were produced by planar flow casting at a melt cooling rate of about 106 K/s. The alloys were crystallized by isothermal annealing with variable duration and by exposing specimens to a short (10 ms) electric pulse. Increasing the copper content to above 30 at.% considerably reduces the plasticity and shape memory effect of the alloys. However, significant reduction of annealing duration greatly improves the shape memory performance due to prevention of the formation of brittle Ti-Cu phases in the alloys structure.
- ПубликацияТолько метаданныеEffect of Electric Pulse Treatment under Tensile Stress on the Properties of Rapidly Quenched Ti50Ni20Cu30 Alloy(2021) Shelyakov, A. V.; Sitnikov, N. N.; Zaletova, I. A.; Borodako, K. A.; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич© 2021, Allerton Press, Inc.Abstract: Amorphous ribbons from a rapidly quenched alloy of the TiNi–TiCu quasi-binary system with copper content of 30 at % are crystallized via electric pulse treatment with variable durations of impact in the range of 1 to 100 ms at external tensile stress of up to 250 MPa. It is shown that the formed bimorph structure of columnar and coarse crystals is characterized by considerable differences when compared to a rapidly quenched alloy with 25 at % copper. An increase in tensile stress does not affect the phase composition or microstructure of the alloy, but it does lower the critical temperatures of martensitic transformation.
- ПубликацияОткрытый доступStructure and functional properties of rapidly quenched TiNiCu alloys with high copper contents(2021) Shelyakov, A. V.; Sitnikov, N. N.; Borodako, K. A.; Khabibullina, I. A.; Dyadechko, A. A.; Шеляков, Александр Васильевич; Ситников, Николай Николаевич; Бородако, Кирилл Анатольевич© Published under licence by IOP Publishing Ltd.Thin materials exhibiting the shape memory effect, with a narrow temperature hysteresis, are required to create miniature and high-speed devices. Quasi-binary intermetallic TiNi-TiCu alloys with high copper contents (more than 10 at %) demonstrate the reversible martensitic transformation with a small (4-6 K) hysteresis. Alloys of the TiNi-TiCu system with a copper content of 30-40 at.% were fabricated in an amorphous state by the planar flow casting technique at a melt cooling rate of106 K/s in the form of ribbons 30-50 μm thick. The alloy samples were subjected to dynamic crystallization using a single electric current pulse with duration of 5 ms. X-ray diffraction studies revealed almost fully martensitic state of the alloys with B19 structure at room temperature. TEM examination showed their structure to contain typical B19-martensite plates with a mean size of 20-80 nm. At the same time, the alloys exhibit a one-stage phase martensitic transformation B2↔B19 in the temperature range of (55 75) C, as well as pronounced shape memory effect, whose properties are largely determined by the structural parameters of the alloys.