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ФММН2012:Участники
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| Furelen | Дата: Среда, 26.09.2012, 15:25 | Сообщение # 16 |
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| ЭФФЕКТ СВЕРХСТЕХИОМЕТРИИ ПЛЁНОК ДИБОРИДОВ ПЕРЕХОДНЫХ МЕТАЛЛОВ
А.А. Гончаров
Донбасская государственная машиностроительная академия,
83013 г. Краматорск, Донецкой обл., Украина
In this paper present results of formation of nanocrystal over-stoichiometry films diborides transitional metals are defined. with a structure of growth (00.1) and columnarn structure. It is shown that over-stoichiometry coverings surpass in the indicators stoichiometry that gives the chance to judge a defining role of covalent communication В-В at their synthesis. The explanation of effect of "over-stoichiometry" arising thus is offered.
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| Furelen | Дата: Среда, 26.09.2012, 15:31 | Сообщение # 17 |
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| ВПЛИВ ІОННОЇ ІМПЛАНТАЦІЇ СІРКОЮ ТА ФОСФОРОМ НА ОПТИЧНІ ПАРАМЕТРИ КРИСТАЛІВ ТА ТОНКИХ ПЛІВОК Cu6PS5I
І.П. Студеняк1, В.Ю. Ізай1, P. Kúš2, A. Plecenik2,
M. Zahoran1, J. Greguš1, T. Roch1
1Ужгородський національний університет, Ужгород, Україна
2Comenius University, Bratislava, Slovakia
In this paper the implanted Cu6PS5I single crystals and thin films are studied. The implantation of crystals and thin films under investigations was carried out at the different values of fluence with the using the S+ and P+ ions; ions energy was 150 keV. Transmission spectra of thin films and influence of ion implantation on spectra and parameters of exponential absorption edge are analyzed. Dependences of the optical pseudogap and Urbach energy in implanted crystals and thin films on fluence values are investigated.
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| Furelen | Дата: Среда, 26.09.2012, 15:33 | Сообщение # 18 |
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| DEGRADATION OF EMITTING PROPERTIES OF GAP LIGHT EMITTING DIODES IN THE FIELDS OF RADIATION
O. Hontaruk, A. Kovalenko, I. Petrenko, M. Pinkovska, O. Pustovyi,
V. Tartachnyk, V. Valeshchuk,
Institute for Nuclear Research of NAS of Ukraine, 47 Pr. Nauky, Kyiv 03680, Ukraine,
Spectral state of GaP light emitting diodes depends on operating mode, thus to know the spectral peculiarities of devices, their stability and operational exploitation it means to improve the technology of creation and to optimise their use in power radiation fields. We studied luminescence spectra of industrial light emitting diodes (LEDs) at various loads, especially the influence of fast particle irradiation on emitting characteristics and time degradations of devices.
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| Furelen | Дата: Среда, 26.09.2012, 15:35 | Сообщение # 19 |
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| INFLUENCE OF HIGH-ENERGY α-PARTICLES ON ELECTROPHYSICAL CHARACTERISTICS OF GaP LIGHT EMITTING DIODES
V. Vorobiov, O. Hontaruk, V. Kochkin, V. Opilat, I. Petrenko, V. Tartachnyk, V. Shlapatska
Institute for Nuclear Research of NAS of Ukraine, 47 Pr. Nauky, Kyiv 03680, Ukraine
Modern epitaxy methods of creation of p-n junctions make it possible to obtain devices with minimal dislocation networks in junction. The networks are known to be the reason of time degradation of luminescence. Even low numbers of residual dark spots and dark lines in the places of temperature gradient, where Lenz-Joule heat is extracted, are the main source of non-radiative centers. Thus information about the defect structure of diode, and especially of its depleted region, allows improving emitting characteristics, stability and operational exploitation of LEDs.
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| Furelen | Дата: Среда, 26.09.2012, 15:39 | Сообщение # 20 |
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| SPECTRUM OF ELECTRON STATES AND PARAMETERS OF Si CRYSTAL WITH OXYGEN-SILICON PRECIPITATES, IRRADIATED BY FAST NEUTRONS
Groza A.A., Litovchenko P.G., Matveeva L.I.(1), Neliuba P.L. (1),
Pinkovska M.B., Starchyk M.I.
Institute for Nuclear Research of NAS of Ukraine, 47 Pr. Nauky, Kyiv 03680, Ukraine
(1) Institute for Semiconductor Physics by V.E. Lashkarev of NAS of Ukraine, 45 Pr. Nauky,
Kyiv 03028, Ukraine
The paper deals with properties of oxygen reach Si crystal irradiated with fast reactor neutrons. The spectra of electron states and electrical properties were studied by the method of modulation spectroscopy of light electrical reflection (ER).
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| Furelen | Дата: Среда, 26.09.2012, 15:44 | Сообщение # 21 |
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| Формування ультрадисперсної структури метастабільних залізонікелевих сплавів
В.Ю. Данільченко
Институт металлофизики им. Г.В. Курдюмова НАН Украины,
бульвар Академика Вернадского, 36, г. Киев
Data about an effect of cyclic martensite transformations on structure state of reverted austenite in Fe-Ni alloys are presented. The connection of degree of the phase components dispersion with mechanism of reverse transformation is analyzed. The conditions of structure refinement up to ultradispersive and nanocrystalline level as result of shear and diffusion character of martensite transformations are defined.
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| Furelen | Дата: Среда, 26.09.2012, 15:45 | Сообщение # 22 |
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| ИССЛЕДОВАНИЕ ПРОЦЕССОВ МОДИФИЦИРОВАНИЯ УГЛЕРОДНЫХ НАНОТРУБОК ПОЛИАНИЛИНОМ
Дьячкова Т.П., Аносова И.В., Дружина В.Н., Богаева К.Д., Ткачев А.Г.
Тамбовский государственный технический университет, Россия, Тамбов
The regularities of oxidative polymerization of aniline on the surface of carbon nanotubes (CNTs) were studied. It was shown the influence of degree of preliminary functionalization of CNTs on the change of temperature and pH of the reaction medium during the process. Electrical conductivity, capacitance and thermal stability of the composite materials obtained were studied.
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| Furelen | Дата: Среда, 26.09.2012, 15:49 | Сообщение # 23 |
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| Влияние фазового наклепа на устойчивость углеродистого твердого раствора
В.Е. Данильченко, В.В. Тарасов, В.Е. Яковлев
Институт металлофизики им. Г.В. Курдюмова НАН Украины, бульвар Академика Вернадского, 36, г. Киев
The crystalline structure changes of the carbon martensite Fe – 24,5 wt.% Ni – 0,5 wt. % C alloy as a result of annealing after the cyclic γ-α-γ- martensitic transitions were investigated using the X-ray method in single crystal specimens. As a result of carbon extraction from α-solid solution acceleration the martensite lattice ratio c/a have reduced during the heating up to 100 °C and partially tempered martensite with reduced carbon content down to 0,25wt.% was formed. The intensification of carbon martensite decomposition after γ-α-γ transitions associated with the influence of crystalline structure defects forming by the direct γ-α and the reverse α-γ transitions.
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| Furelen | Дата: Среда, 26.09.2012, 15:50 | Сообщение # 24 |
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| Інтенсифікація дифузійних процесів у залізомарганцевому сплаві циклічними γ-e-γ-мартенситними перетвореннями
В.Ю. Данільченко, В.Ф. Мазанко, О.В. Філатов, В.Є. Яковлев
Інститут металофізики ім. Г.В. Курдюмова НАН України, бульвар Академіка Вернадського, 36, г. Київ,
A significant cobalt diffusion mobility acceleration as a result of cyclic γ«e-martensitic transformations in iron-manganese alloy is determined by one- and two-dimensional structure defects of e-martensite with face-centered close-packed lattice. Such defects (dislocations, low angle subboundaries of dislocations, chaotic stacking faults) were formed during cyclic γ«e-martensitic transformations. Peak cobalt diffusion coefficient increase was observed under thermocycling when maximum quantity of lattice defects increase was fixed.
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| Furelen | Дата: Среда, 26.09.2012, 15:51 | Сообщение # 25 |
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| ЗЕРНОВА СТРУКТУРА СПЛАВУ Н31 ЗАГАРТОВАНОГО ІЗ РОЗПЛАВУ
Є.М. Дзевін
Інститут металофізики ім. Г.В. Курдюмова НАН України
Structure-and-phase state and characteristics of martensitic transformations in N31 Fe-Ni-alloy ribbons rapidly quenched from melt are investigated. X-ray investigations show the considerable texture of ribbon on the free surface. Structure state of rapidly quenched ribbon is considerable heterogeneous and different not only on the contact and free surfaces but and on the width and length of the ribbon. This fact defined its gradient properties which changed on the whole length of ribbon. Plastic deformation of ribbon at the room temperature (rolling) resulted in cracks formation between gas cavity zone and direct contact zone. Under the next deformation these cracks transform into the cells which were elongated in rolling direction and the ribbon become the entirely perforated grid. Formation of such grid became possible at the condition of considerable different plasticity of local areas of ribbon.
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| Furelen | Дата: Среда, 26.09.2012, 15:55 | Сообщение # 26 |
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| МОДЕЛИРОВАНИЕ ПРОЦЕССОВ ЭЛЕКТРОПРОВОДНОСТИ В НАНОКОМПОЗИТАХ НА ОСНОВЕ СЕТЧАТЫХ ПОЛИМЕРОВ И КАРБОНАНОТРУБОК
В.Б. Долгошей1, В.В. Корсканов2, И. Л. Карпова2, Л.В.Бардаш2
1 Киевский национальный университет строительстива и архитектуры, Киев, Воздуфлотский проспект, 31
2Институт химии высокомолекулярных соединений НАН Украины Харьковское шосе 48, Киев 02160
The dependences of electric conductivities of thermosetting polymer nanocomposites based on epoxy polymer and polycyanurate filled by carbon nanotubes were investigated. Low values of percolation threshold at volume fraction of carbon nanotubes from 0,001 to 0,002 were observed for all samples. Absolute values of the percolation threshold are in good agreement with the results of mathematical modeling. It is established that electrical properties of thermosetting polymer nanocomposites can be characterized in the frame of the same theoretical model despite difference in polymers properties.
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| Furelen | Дата: Среда, 26.09.2012, 15:58 | Сообщение # 27 |
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| ВЛИЯНИЕ ТЕМПЕРАТУРЫ НА КИНЕТИКУ РОСТА И СТРУКТУРНЫЕ ХАРАКТЕРИСТИКИ ЛЕГИРОВАННЫХ АЗОТОМ НАНОСТРУКТУРНЫХ АЛМАЗНЫХ ПОКРЫТИЙ
Грицына В.И., Дудник С.Ф., Кошевой К.И., Опалев О.А., Решетняк Е.Н., Василенко Р.Л., Стрельницкий В.Е.
Национальный научный центр «Харьковский физико-технический институт»
г. Харьков, Украина
The experimental results of investigations of influence of the substrate temperature on the kinetics of growth and structure of nitrogen-doped nanocrystalline diamond coatings have been discussed. It is established that the activation energy of process of diamond nanocrystalline coatings synthesis changes near 1190 K. Structure of nanocrystalline diamond coatings, synthesized lower and higher this temperature, also essentially differs. Totality of the data obtained testifies the difference in mechanism of formation of nanostructured diamond coatings for different temperature range of synthesis.
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| Furelen | Дата: Среда, 26.09.2012, 16:15 | Сообщение # 28 |
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| ТУННЕЛИРОВАНИЕ ЭЛЕКТРОНОВ ЧЕРЕЗ ПОТЕНЦИАЛЬНЫЕ БАРЬЕРЫ ТРЕУГОЛЬНОЙ ФОРМЫ
О. Г. Жевняк
Белорусский государственный университет
In this paper the expression for calculation of coefficient of electron quantum transport through triangular potential barriers is obtained. This expression is based on direct decision of Schrodinger equation by using infinite mathematical rows. The dependencies of coefficient of electron tunneling on electron energy for some triangular potential barriers are calculated.
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| Furelen | Дата: Среда, 26.09.2012, 16:16 | Сообщение # 29 |
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| МОДЕЛИРОВАНИЕ МЕТОДОМ МОНТЕ-КАРЛО ВЛИЯНИЯ ГЛУБИНЫ ЗАЛЕГАНИЯ СТОКА НА ТОК СТОКА В КОРОТКОКАНАЛЬНЫХ
МОП-ТРАНЗИСТОРАХ
О. Г. Жевняк
Белорусский государственный университе т
In this paper the effect of drain region depth on electron current in short channel MOSFETs is considered. The dependencies of electron energy as well as drain current on drain region depth are calculated by Monte Carlo simulation of electron transport. Obtained data prove that increasing of drain region depth leads to additional electron heating.
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| Furelen | Дата: Среда, 26.09.2012, 16:18 | Сообщение # 30 |
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| Влияние индия на структурно-фазовые особенности никелевых электрохимических систем
Звягинцева А.В.
Воронежский государственный технический университет, Воронеж, Россия
Phase composition of nickel-indium systems, obtained by electrochemical method, depending on the soleplate content of indium in the electrolyte by X-ray analysis. When the content of the electrolyte In2(SO4)3 in an amount less than 2 g / l of nickel is deposited on the cathode, the presence of pure indium and its compounds with nickel were detected. With the increase in soleplate content of indium (III) in a solution of 2 g / l or higher at the cathode is deposited pure nickel and inter metallic compounds::InNi2, InNi3, In3Ni2, η-In27Ni10. In nickel electrochemical systems revealed the presence of the phase η – In27Ni10, the existence of which there are data in the tables ASTM, but not specified in the existing literature charts the equilibrium state of the system Ni - In
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