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Каталог книг и брошюр библиотеки ИФ СО РАН

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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Osipova I.V.
Заглавие : Recording of nitrogen-contained carbon-helium plasma parameters by emission spec?troscopy method and investigation of obtained nanosized substances
Коллективы : "Diagnostics of carbon nanostructures", One day conference, School for young scientists
Место публикации : One day conference / School for young scientists "Diagnostics of carbon nanostructures". - P.22
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpov I.V., Fedorov L. Yu, Abkaryan A.K., Zharkov S. M., Molokeev M. S., Ivanenko A. A., Nemtsev I. V., Irtyugo L.A.
Заглавие : Resistive switching properties of a nanostructured layer of mixed ZrO2 phases obtained in low-pressure arc discharge plasma
Колич.характеристики :9 с
Место публикации : Vacuum. - 2024. - Vol. 227. - Ст.113375. - ISSN 0042207X (ISSN), DOI 10.1016/j.vacuum.2024.113375. - ISSN 18792715 (eISSN)
Примечания : Cited References: 34. - The work was performed with a support of the grant of the Russian Science Foundation (Project No. 24-29-00374, https://rscf.ru/project/24-29-00374/)
Аннотация: The controlled vacuum-arc synthesis of zirconium dioxide (ZrO2) nanoparticles is considered, which makes it possible to regulate the percentage ratio of the monoclinic and tetragonal phases. The samples were characterized using XRD analysis, SEM, HRTEM analysis, FT-IR analysis, TG/DTA analysis and EPR spectroscopy. It has been established that the formation of the tetragonal phase is associated with the formation of a large number of oxygen vacancies formed due to high-speed quenching of nanoparticles. Reducing the operating gas pressure in a vacuum chamber from 180 Pa to 30 Pa makes it possible to obtain nanoparticles up to 2 nm in size. The synthesized ZrO2 nanoparticles do not contain foreign impurities and when heated, the weight loss is up to 7 %. The process of local resistive switching in the contact of an atomic force microscope (AFM) probe to a nanostructured ZrO(2-x) layer on a conducting substrate has been studied. Cyclic current-voltage characteristics demonstrate the existence of stable states of high and low resistance, switched by changing the polarity of the applied voltage. The coexistence of the m- and t-ZrO2 phases (and the resulting oxygen nonstoichiometry in the interboundary regions) provides conditions for the formation/destruction of a filament from oxygen vacancies, which determine the conductivity of the dielectric in the LRS state.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nikolaev N. S., Isakova V. G., Vnukova N. G., Elesina V. I., Glushenko G. A., Tomashevich Y. V., Churilov G. N.
Заглавие : Synthesis of Ni nanoclusters supported on diamond by plasma technique and their electrochemical properties
Колич.характеристики :6 с
Место публикации : Diam. Relat. Mater. - 2024. - Vol. 142. - Ст.110844. - ISSN 09259635 (ISSN), DOI 10.1016/j.diamond.2024.110844. - ISSN 18790062 (eISSN)
Примечания : Cited References: 35
Аннотация: In this study, particles of synthetic undoped diamond (DN) obtained via the high pressure – high temperature method were coated with a nickel shell using metallic nickel plasma in a two-jet plasma generator with gas vortex and magnetic flux stabilization. Through the use of scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, we observed the formation of a nickel diamond composite with a core-shell structure, where DN serves as the core and Ni nanoclusters form the shell (DN@Ni). The results of voltammetric analysis indicated that DN@Ni, when deposited on a graphite electrode, exhibited significant electrocatalytic activity in the oxidation of methanol and paracetamol in an alkaline electrolyte.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shalygina T. A., Rudenko M. S., Nemtsev I. V., Parfenov V. A., Voronina S. Yu.
Заглавие : Plasma-chemical method of silicon carbide modification to obtain particles with controlled surface morphology
Место публикации : Tech. Phys. Lett. - 2022. - Vol. 48, Is. 2. - P.57-60. - ISSN 10637850 (ISSN), DOI 10.21883/TPL.2022.02.53582.19042. - ISSN 10906533 (eISSN)
Примечания : Cited References: 9. - This study was conducted under state assignment from the Ministry of Science and Higher Education of the Russian Federation for the ”Smart Materials and Structures“ research laboratory (project No. FEFE-2020-0015 ”Development of Multipurpose Smart Materials and Structures Based on Modified Polymer Composite Materials Remaining Functional in Extreme Conditions“)
Аннотация: A plasma-chemical method for the modification of silicon carbide particles is presented, which makes it possible to obtain particles with a controlled surface morphology. The variable parameter of particle processing was the ratio of the fraction of plasma-forming (Ar) and additional (H) gases. It was shown that at Ar/H = 100/0, the formation of a carbon shell is observed; at Ar/H ratios of 91/9 and 84/16, the particles are characterized by a carbon shell decorated with silicon nanoparticles or nanowires, respectively. The modified particles were analyzed using scanning electron microscopy and Raman spectroscopy.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpov I. V., Ushakov A. V., Lepeshev A. A., Demin V. G., Fedorov L. Y., Goncharova E. A., Zeer G. M., Zharkov S. M., Akbaryan A. K.
Заглавие : Investigation of microstructural features, phase composition, and magnetic characteristics of YBCO-based composites and additives of CuO non-superconducting component prepared in low-pressure arc discharge plasma
Место публикации : Inorg. Mater.: Appl. Res. - 2021. - Vol. 12, Is. 1. - P.142-146. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113321010172
Примечания : Cited References: 12. - This work was supported by the Russian Science Foundation (project no. 16-19-10054)
Аннотация: A method making it possible to form HTS ceramics of non-superconducting coating consisting of self-organizing CuO crystals, whose sizes are less than the coherence length, i.e., within several tens of nanometers, has been developed. It has been shown that the combination of self-organizing structures in the form of whiskers and nanoparticles which arise as a result of combined sintering of YBa2Cu3O(7–x) powders and electric arc CuO nanopowders results in a significant increase in the current density and appearance of peak effect at high magnetic fields. Very high current density arises from the complex vortex pinning, where whisker defects provide high pinning energy and nanoparticles suppress flux creep. The morphology of such structures can be controlled by a simple change in the concentration of nanodisperse additives. It has been shown that 20 wt % of CuO additive is optimal.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Novikov P. V., Osipova I. V., Churilov G. N., Dudnik A. I.
Заглавие : Simulation of fullerene formation in a carbon-helium plasma
Место публикации : Fuller. Nanotub. Carbon Nanostruct. - 2021. - Vol. 29, Is. 5. - P.337-342. - ISSN 1536383X (ISSN), DOI 10.1080/1536383X.2020.1842738
Примечания : Cited References: 22
Аннотация: A kinetic model of fullerene formation in the carbon-helium plasma of an arc discharge was proposed. In the model, in addition to the coagulation of carbon clusters, the cluster isomerization and their cooling with a buffer gas were taken into account. The simulation results of the fullerene formation are in qualitatively agreement with the experimental data, i.e., the fraction of higher fullerenes increases at high pressures in the fullerene mixture.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Карпов И. В., Ушаков А. В., Лепешев, Анатолий Александрович, Дёмин В. Г., Федоров Л. Ю., Гончарова Е. А., Зеер Г. М., Жарков, Сергей Михайлович, Абкарян А. К.
Заглавие : Исследование микроструктурных особенностей, фазового состава и магнитных свойств композитов на основе YBCO и добавок несверхпроводящего компонента СuО, полученного в плазме дугового разряда низкого давления
Место публикации : Материаловедение. - 2020. - № 6. - С. 27-32. - ISSN 1684-579X, DOI 10.31044/1684-579X-2020-0-6-27-32
Примечания : Библиогр.: 12
Аннотация: Разработан метод, позволяющий формировать на поверхности дисперсных частиц порошка ВТСП-керамики несверхпроводящего покрытия, состоящего из самоорганизующихся кристаллов CuO, размеры которых менее длины когерентности, т.е. в пределах нескольких десятков нанометров. Показано, что сочетание самоорганизующихся структур в виде «усов» и наночастиц, появляющихся в результате совместного спекания порошков YBa2Cu3O7-x и электродуговых нанопорошков CuO, приводит к существенному увеличению плотности тока и появлению пик-эффекта в области сильных магнитных полей. Очень высокая плотность тока возникает из сложного пиннинга вихрей, где дефекты в виде «усов» обеспечивают большую энергию пиннинга, а наночастицы подавляют крип потока. Регулирование морфологии подобных структур возможно простым изменением концентрации нанодисперсных добавок. Показано, что наиболее оптимальной является добавка CuO в количестве 20% (мас.).A method has been developed, that allows one to form a non-superconducting coating on the surface of dispersed particles of an HTSC ceramic powder consisting of self-organizing CuO crystals whose sizes are less than the coherence length, i.e. within a few tens of nanometers. It was found out that the combination of self-organizing structures in the form of «whiskers» and nanoparticles resulting from the joint sintering of YBa2Cu3O7-x powders and CuO nanocrystals led to a significant increase in current density and the appearance of a peak effect in the region of strong magnetic fields. A very high current density arises from complex pinning of vortices, where defects in the form of «whiskers» provide a large pinning energy, and nanoparticles suppress creep flux. Morphology of such structures can be regulated by a simple change in the concentration of nanodispersed additives. It was determined that the addition of CuO in an amount of 20 wt.% was the most optimal.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ushakov A. V., Karpov I. V., Fedorov L. Y., Demin V. G., Goncharova E. A., Shaihadinov A. A., Zeer G. M., Zharkov S. M.
Заглавие : The effect of microstructural features on the ferromagnetism of nickel oxide nanoparticles synthesized in a low-pressure arc plasma
Место публикации : Physica E. - 2020. - Vol. 124. - Ст.114352. - ISSN 13869477 (ISSN), DOI 10.1016/j.physe.2020.114352
Примечания : Cited References: 31. - The work was performed with a support of the grant of the Russian Science Foundation (Project No. 16-19-10054 ). The electron microscopy investigations were conducted in the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation
Аннотация: Nickel oxide nanoparticles were first synthesized by sputtering high-purity nickel in an oxygen plasma of a low-pressure arc discharge. The structure, morphology, and optical and magnetic properties of NiO nanoparticles were studied by XRD, TEM, FTIR, UV-VIS, and VSM. TEM images showed that the obtained NiO nanoparticles have a narrow particle size distribution and an average particle size of 12 nm. The XRD results and the processing of diffractograms by the Rietveld method showed that the obtained nanoparticles have a face-centered cubic lattice with an average particle size of 13 nm. With decreasing temperature, residual stresses increase and peaks corresponding to the superstructure appear. The band gap of NiO was determined from the optical absorption spectrum and amounted to 3.21 eV. Magnetic measurements showed that, at temperatures of 200 and 300 K, NiO nanoparticles, unlike bulk particles, exhibit ferromagnetic behavior, and at 5 K a magnetic hysteresis loop appears. Based on the studies, a dendritic model of the nanoparticle microstructure is proposed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dudnik A. I., Osipova I. V., Nikolaev N. S., Churilov G. N.
Заглавие : Comparative analysis of two methods for synthesis of fullerenes at different helium pressures
Коллективы : RFBRRussian Foundation for Basic Research (RFBR) [18-32-20011]
Место публикации : Fuller. Nanotub. Carbon Nanostruct. - 2020. - Vol. 28, Is. 9. - P.697-701. - ISSN 1536-383X, DOI 10.1080/1536383X.2020.1746281. - ISSN 1536-4046(eISSN)
Примечания : Cited References: 16. - The reported study was funded by RFBR according to the research project No 18-32-20011
Предметные рубрики: PLASMA
YIELD
DISCHARGE
PARAMETERS
DEPENDENCE
C60
Аннотация: The results of the effect of helium pressure in the chamber on the amount and composition of the produced fullerenes (C60, C70, etc.) synthesized in the arc plasma with graphite electrodes are presented. The findings obtained when the arc is powered by a direct (DC) and alternating (AC) currents of low frequency were compared in the same chamber with the electrodes located at the same angle to each other. These two methods are drastically different. The complete conversion of graphite into fullerene soot in AC occurs, but a part of the graphite is converted into a cathode deposit that does not contain fullerenes in DC, the relative amount of which increases when decreasing the helium pressure in the chamber. The highest fullerene content in fullerene soot of 10.2 wt.% is produced at a pressure of 127.5 kPa in AC arc, but in DC arc, the highest content of fullerenes in fullerene soot of 8.3 wt.% is produced at a pressure of 33.3 kPa.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Orlov V. A., Patrin G. S., Orlova I. N.
Заглавие : Interaction of a Magnetic Vortex with Magnetic Anisotropy Nonuniformity
Место публикации : J. Exp. Theor. Phys. - 2020. - Vol. 131, Is. 4. - P.589-599. - ISSN 10637761 (ISSN), DOI 10.1134/S1063776120090071
Примечания : Cited References: 51. - This study was supported by the Russian Foundation for Basic Research (project no. 18-02-00161)
Аннотация: The problem of propagation of a magnetic inhomogeneity in the form of a magnetic vortex near a defect simulated by a crystallite with uniaxial anisotropy has been solved theoretically. The defect (crystallite) is implanted into a homogeneous 2D ferromagnetic matrix. Apart from the anisotropy energy, the term responsible for the existence of a centrosymmetric potential is included into the total energy. For calculations, we have used the method of collective variables (Thiele equation). We have considered the variants of bidirectional and unidirectional anisotropy of the crystallite. Analysis of the equations of motion for different directions of the anisotropy axis of the implanted defect has revealed the variety in the behavior of the vortex core as a quasiparticle. The vortex core can be trapped by the defect with equilibrium position of the vortex at rest directly on the crystallite or during its motion at a certain distance from it. It is shown that for a small damping parameter and in the case when the defect anisotropy axis lies in the plane of the magnet, the vortex moves so as if its core experiences the action of the repulsive axially symmetric potential.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Осипова, Ирина Владимировна, Дудник, Александр Иванович, Глущенко, Гарий Анатольевич
Заглавие : Синтез фуллеренов в плазме дуги постоянного и переменного тока
Коллективы : "Функциональные наноматериалы и высокочистые вещества", международная конференция с элементами научной школы для молодежи (8; 2020 ; окт. ; 5-9; Суздаль)
Место публикации : VIII Международная конференция с элементами научной школы для молодежи "Функциональные наноматериалы": сб. материалов. - 2020. - С. 246-247. - ISBN 978-5-6043996-5-1
Примечания : Библиогр.: 4
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Осипова, Ирина Владимировна, Дудник, Александр Иванович, Глущенко, Гарий Анатольевич
Заглавие : Влияние давления гелия на синтез фуллеренов в плазме дуги переменного тока
Коллективы : "Функциональные наноматериалы и высокочистые вещества", международная конференция с элементами научной школы для молодежи (8; 2020 ; окт. ; 5-9; Суздаль)
Место публикации : VIII Международная конференция с элементами научной школы для молодежи "Функциональные наноматериалы": сб. материалов. - 2020. - С. 248-249. - ISBN 978-5-6043996-5-1
Примечания : Библиогр.: 6
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13.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Denisova E. A., Nemtsev I. V., Telegin S. V., Iskhakov R. S., Kuzovnikova L. A., Shepeta N. A.
Заглавие : Microstructure and magnetic properties of Co58Ni10Fe5B16Si11 and Co58Ni10Fe5B16Si11-Al2O3 bulk amorphous coatings prepared by plasma spraying
Коллективы : International Conference on High-Tech and Innovations in Research and Manufacturing
Место публикации : J. Phys.: Conf. Ser. - 2020. - Vol. 1582, Is. 1. - Ст.012078. - DOI 10.1088/1742-6596/1582/1/012078
Примечания : Cited References: 18. - This work was funded by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Regional Fund for the Support of Scientific and Technical Activities (project no. 18-42-240006 Nanomaterials with magnetic properties determined by the topological features of the nanostructure). The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” for the provided equipment
Аннотация: The bulk soft magnetic glassy Co58Ni10Fe5B16Si11 alloy specimens have been prepared by plasma spray deposition. In order to increase resistivity of the material, the bulk Co58Ni10Fe5B16Si11-Al2O3 composite materials were fabricated. The investigations of structure and magnetic properties of the bulk samples were carried out by X-ray diffraction, electron microscopy and magnetic measurements. The relation of the structural features and magnetic characteristics of the bulk coating to the main parameters of the deposition regimes was determined. Optimized plasma spray deposition parameters allowed obtaining bulk glassy samples with magnetic parameters that are not inferior to the characteristics of a thermally treated rapidly quenched ribbon with the same composition. It was found that the bulk amorphous coatings can be characterized as a heterophase system. The relaxation annealing of the Co58Ni10Fe5B16Si11 bulk coating leads to a phase transition in this alloy in the precrystallization temperature range. The magnetic properties of the both kinds of coatings are correlated with changes in the microstructure. The appearance of nanocrystalline phase with TC640 K during relaxation heat treatment leads to a decrease of the coercivity and to an increase of the permeability. A comparison between the magnetic properties of the CoNiFe-BSi coating and (CoNiFe-BSi)-Al2O3, composite coating is carried out.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ushakov A. V., Karpov I. V., Lepeshev A. A., Petrov M. I., Fedorov L. Y., Gokhfel'd D. M., Zharkov S. M., Zeer G. M., Demin V. G., Abkaryan A. K.
Заглавие : The Influence of CuO Dopant Nanoparticles, Prepared via the Arc Plasma Synthesis Method, on the Critical Current of YBa2Cu3O7–δ Composites
Место публикации : Inorg. Mater.: Appl. Res. - 2019. - Vol. 10, Is. 4. - P.999-1002. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113319040439
Примечания : Cited References: 13. - This work was supported by the Russian Science Foundation (project no. 16-19-10054).
Аннотация: YBa2Cu3O7 – δ–CuO composites with CuO particle contents of 0.5, 1.0, 2.0, 5.0, 10, 15, 20, and 24% were produced via arc plasma synthesis. Their magnetic properties were analyzed in the context of the expanded critical state model. In comparison with a reference sample, the critical current intragranular density increased in composites with CuO concentrations of 0.5, 1, 20, and 24%. The mechanisms of the influence of nanodopants on the change in the critical current density at various volume contents of nano-CuO were proposed as well.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Churilov G. N., Nikolaev N. S., Osipova I. V., Cherepakhin A. V., Nemtsev I. V., Velikanov D. A., Andyuseva V. G.
Заглавие : Core-shell Nanosize Particles Mg@Ni: Synthesis and Properties
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2019. - Vol. 12, Is. 1. - P.28-35. - ISSN 1997-1397, DOI 10.17516/1997-1397-2019-12-1-28-35; \b Журнал СФУ. Математика и физика. - ISSN 2313-6022(eISSN)
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): core-shell--nanopartials--nickel-magnesium--synthesis in plasma--surface coating--частицы ядро–оболочка--наночастицы--никель-магниевые частицы--плазмохимический синтез--покрытие поверхности частицы
Аннотация: In this paper, we study particles with metallic core (magnesium) - metal shell (nickel) structure, synthesized in metal-containing plasma of high frequency arc discharge. X-ray diffraction analysis, X-ray fluorescence analysis and scanning electron microscopy show that the particles have a uniform nickel shell, which is also indirectly confirmed by comparing the results of hydrogenation of Mg and Mg@Ni particles. Measurement of volume magnetization indicates that shell thickness of most particles is not more than 22 nm.В данной работе исследованы частицы со структурой металлическое ядро (магний) - металлическая оболочка (никель), полученные в металлсодержащей высокочастотной плазме дугового разряда. Методами рентгенофазового анализа, рентгенофлуоресцентного анализа, сканирующей электронной микроскопии показано, что частицы имеют сплошную никелевую оболочку, что также косвенно подтверждается сравнением результатов гидрирования частиц Mg и Mg@Ni. С помощью измерений объемной намагниченности установлено, что наибольшая часть частиц имеет толщину оболочек не более 22 нм.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Dudnik A. I., Osipova I. V., Nikolaev N. S., Churilov G. N.
Заглавие : Process control of fullerene synthesis by the influence of a magnetic field on the plasma of a high-frequency carbon arc
Коллективы : "Advanced carbon nanostructures", International conference, Физико-технический институт им. А.Ф. Иоффе РАН, Национальный исследовательский центр "Курчатовский институт", Санкт-Петербургский государственный технологический институт (технический университет)
Место публикации : 14th Int. Conf. "Adv. Carbon Nanostructures": Book of abstracts. - 2019. - Poster session 1: Fullerenes and Nanodiamond Particles. - Ст.P1-12. - P.79. - ISBN 978-5-93634-060-4
Примечания : Cited References: 3
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Denisova E. A., Kuzovnikova L. A., Nemtsev I. V., Kuzovnikov A. A., Iskhakov R. S., Lepeshev A. A., Telegin S. V., Yurkin G. Yu., Shepeta N. A.
Заглавие : Magnetic properties of bulk amorphous composite coating Co58Ni10Fe5B16Si11–Al2O3, Co58Ni10Fe5B16Si11–ZrO2 and Co58Ni10Fe5B16Si11–SiO2 produced by plasma spray deposition and dynamic compaction
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст.J.P42. - P.261. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Dudnik A. I., Osipova I. V., Novikov P. V., Churilov G. N.
Заглавие : Fullerene formation in plasma at different rates of temperature and electron concentration change
Коллективы : "Advanced carbon nanostructures", International conference, Физико-технический институт им. А.Ф. Иоффе РАН, Национальный исследовательский центр "Курчатовский институт", Санкт-Петербургский государственный технологический институт (технический университет)
Место публикации : 14th Int. Conf. "Adv. Carbon Nanostructures": Book of abstracts. - 2019. - Poster session 1: Fullerenes and Nanodiamond Particles. - Ст.P1-14. - P.81. - ISBN 978-5-93634-060-4
Примечания : Cited References: 6
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Churilov G. N., Nikolaev N. S., Cherepakhin A. V., Dudnik A. I., Tomashevich E. V., Trenikhin M. V., Bulina N. G.
Заглавие : Thermal oxidation of a carbon condensate formed in high-frequency carbon and carbon-nickel plasma flow
Коллективы : Russian Foundation for Basic Research; Government of Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation for the Support of Scientific and RD Activities [16-43-242148]
Место публикации : Tech. Phys. - 2018. - Vol. 63, Is. 2. - P.216-219. - ISSN 1063-7842, DOI 10.1134/S1063784218020093. - ISSN 1090-6525(eISSN)
Примечания : Cited References:12. - Transmission electron microscopy investigations were carried out on equipment of the Omsk Regional Center of Collective Use of the Siberian Branch of the Russian Academy of Sciences. This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for the Support of Scientific and R&D Activities, project no. 16-43-242148.
Предметные рубрики: FULLERENES
OXIDE
METAL
Аннотация: We have reported on the comparative characteristics of thermal oxidation of a carbon condensate prepared by high-frequency arc evaporation of graphite rods and a rod with a hollow center filled with nickel powder. In the latter case, along with different forms of nanodisperse carbon, nickel particles with nickel core-carbon shell structures are formed. It has been found that the processes of the thermal oxidation of carbon condensates with and without nickel differ significantly. Nickel particles with the carbon shell exhibit catalytic properties with respect to the oxidation of nanosized carbon structures. A noticeable difference between the temperatures of the end of the oxidation process for various carbon nanoparticles and nickel particles with the carbon shell has been established. The study is aimed at investigations of the effect of nickel nanoparticles on the dynamics of carbon condensate oxidation upon heating in the argon-oxygen flow.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Usenko A., Moskovskikh D., Korotitskiy A., Gorshenkov M., Zakharova E., Fedorov A. S., Parkhomenko Y., Khovaylo V.
Заглавие : Thermoelectric properties and cost optimization of spark plasma sintered n-type Si0.9Ge0.1 - Mg2Si nanocomposites
Место публикации : Scripta Mater. - 2018. - Vol. 146. - P.295-299. - ISSN 13596462 (ISSN), DOI 10.1016/j.scriptamat.2017.12.019
Примечания : Cited References: 28. - This work was supported by Russian Science Foundation (project No. 16-13-00060). Part of the work (structural characterization of the samples) was carried out with financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST “MISiS”. Partial support by Act 211 Government of the Russian Federation, contract # 02.A03.21.0011, is also acknowledged.
Ключевые слова (''Своб.индексиров.''): cost optimization--lattice thermal conductivity--magnesium silicides--spark plasma--thermo-electric materials--thermoelectric figure of merit--thermoelectric performance--thermoelectric properties
Аннотация: We report on thermoelectric properties of low Ge content n-type Si0.9Ge0.1–Mg2Si nanocomposite. Introduction of the Mg2Si phase into a SiGe matrix resulted in a dramatic drop of the lattice thermal conductivity beyond the previously reported lowest limit for SiGe alloys due to intensification of phonon scattering on SiGe–Mg2Si grain boundaries. For a sample doped with 1 at.% of Mg2Si, the peak value of thermoelectric figure of merit ZT reached ~ 0.8 at 800 °C. Sintered nanocomposites still exhibit high thermoelectric performance while being almost two times cheaper than Si0.8Ge0.2.
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