22 research outputs found

    Modification of multi-profile surfaces by compression plasma flows action of quasistationary high-current plasma accelerator

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    The results of investigations into the action of compression plasma flows generated by the gas-discharge twostage quasistationary high-current plasma accelerator (QHPA) on multi-profile details are presented. Efficiency of the QHPA application to hardening treatment of samples from low- and medium-carbon steels with sufficient for practical purposes depth and microhardness of modified surface layer is shown

    Radiation effects in nanosized clusters

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    In this communication we present results of computer simulation of radiationenhanced processes in nanosized ferromagnetic clusters under the irradiation by elementary particles and ions. Dynamic defects and possibility of their experimental monitoring are considered. Radiation resistance of nanostructured materials is characterized by the size of instability region for knocked-out atom. Heating and thermoelastic effects on defect structure and materials functionality are discussed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2085

    Formation of silicon-based nanostructures by compression plasma flows

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    The use of compression flows (CPF) for the formation of metal and silicide nanostructures for data storage devices, thermoelectric materials and solar cells is presented. The action of CPF with injected metallic powder results in the formation of coatings composed of spherical clusters with complex structure: each submicron cluster (0,1-0,2 ΞΌm radius) is formed from a number of nanosized ones (10-25 nm radius). The action of CPF on binary β€œmetal-silicon” systems provides formation of branched silicon dendrites (tip radius ~ 200 nm, primary spacing ~ 1,2 ΞΌm); interdendritic space is filled with nanostructured (50-100 nm) β€œsilicide-silicon” and β€œmonosilicide-disilicide” composite due to melting of the surface layer, rapid solidification (~ 10-3 m/s) and constitutional overcooling. Mechanisms of formation of nanostructured composites on silicon surface and in thick surface layers is discussed in terms of order parameter evolution and non-equilibrium solidification models. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2086

    Studies on Dynamic Pressure of Compression Plasma Flow

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    The temporal evolution of dynamic pressure of a compression plasma flow, generated by a magneto-plasma compressor, was investigated in a range of initial voltages from 2 to 4.5 kV by an interferometric method. The main advantages of the method are that it is insusceptible to electromagnetic noises and mechanical vibrations, requires no calibration procedures and ensures local readings from small areas. Depending on the initial voltage, the pressure values varied from 0.7 to 16 atm

    Modification of coating-substrate systems under the action of compression plasma flow

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    The results of studying changes in physical and mechanical properties of coating-substrate systems subjected to the compression plasma flow are presented. The possibility for doping the substrate both with pre-deposited coating components and with plasma-forming substance during liquid-phase mixing and resolidification of near-surface layers melted by the compression plasma flow is shown.ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ Π΄ΠΎΡΠ»Ρ–Π΄ΠΆΠ΅Π½ΡŒ Π·ΠΌΡ–Π½ΠΈ Ρ„Ρ–Π·ΠΈΠΊΠΎ-ΠΌΠ΅Ρ…Π°Π½Ρ–Ρ‡Π½ΠΈΡ… властивостСй систСм покриття-ΠΏΡ–Π΄ΠΊΠ»Π°Π΄ΠΊΠ° ΠΏΡ€ΠΈ Π²ΠΏΠ»ΠΈΠ²Ρ– Π½Π° Π½ΠΈΡ… компрСсійним ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌ ΠΏΠΎΡ‚ΠΎΠΊΠΎΠΌ. ΠŸΡ€ΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡ‚Ρ€ΠΎΠ²Π°Π½ΠΎ ΠΌΠΎΠΆΠ»ΠΈΠ²Ρ–ΡΡ‚ΡŒ лСгування ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρƒ ΠΏΡ–Π΄ΠΊΠ»Π°Π΄ΠΊΠΈ як ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚ΠΎΠΌ ΠΏΠΎΠΏΠ΅Ρ€Π΅Π΄Π½ΡŒΠΎ нанСсСного покриття, Ρ‚Π°ΠΊ Ρ– Ρ€ΠΎΠ±ΠΎΡ‡ΠΎΡŽ Ρ€Π΅Ρ‡ΠΎΠ²ΠΈΠ½ΠΎΡŽ ΠΏΠ»Π°Π·ΠΌΠΈ, Ρƒ процСсі Ρ€Ρ–Π΄ΠΊΠΎΡ„Π°Π·Π½ΠΎΠ³ΠΎ ΠΏΠ΅Ρ€Π΅ΠΌΡ–ΡˆΡƒΠ²Π°Π½Π½Ρ Ρ– пСрСзатвСрдіння Ρ€ΠΎΠ·ΠΏΠ»Π°Π²Π»Π΅Π½ΠΈΡ… ΠΏΡ–Π΄ Π΄Ρ–Ρ”ΡŽ компрСсійного ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠ³ΠΎ ΠΏΠΎΡ‚ΠΎΠΊΡƒ ΠΏΡ€ΠΈΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Ρ–Ρ… ΡˆΠ°Ρ€Ρ–Π².ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдований измСнСния Ρ„ΠΈΠ·ΠΈΠΊΠΎ-мСханичСских свойств систСм ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠ΅- ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠ° ΠΏΡ€ΠΈ воздСйствии Π½Π° Π½ΠΈΡ… компрСссионным ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹ΠΌ ΠΏΠΎΡ‚ΠΎΠΊΠΎΠΌ. ΠŸΡ€ΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡ‚Ρ€ΠΈΡ€ΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ лСгирования ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π° ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ ΠΊΠ°ΠΊ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚ΠΎΠΌ ΠΏΡ€Π΅Π΄Π²Π°Ρ€ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ нанСсСнного покрытия, Ρ‚Π°ΠΊ ΠΈ Ρ€Π°Π±ΠΎΡ‡ΠΈΠΌ вСщСством ΠΏΠ»Π°Π·ΠΌΡ‹, Π² процСссС ΠΆΠΈΠ΄ΠΊΠΎΡ„Π°Π·Π½ΠΎΠ³ΠΎ ΠΏΠ΅Ρ€Π΅ΠΌΠ΅ΡˆΠΈΠ²Π°Π½ΠΈΡ ΠΈ пСрСзатвСрдСвания расплавлСнных ΠΏΠΎΠ΄ дСйствиСм компрСссионного ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΡ‚ΠΎΠΊΠ° приповСрхностных слоСв

    Nanostructured formations and coatings created on the surface of materials exposed to compression plasma flows

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    The paper presents the results of investigations on changing silicon and aluminium morphology under the action of compression plasma flows generated by the quasi-stationary plasma accelerator (magnetoplasma compressor type). The feasibility of spraying nanostructured metal films by compression flows was demonstrated. The resulting single-layer coating consists of spherical particles measuring 50 to 200 nm. Such particles bonded to each other cover a surface relief including flat areas and regular structures developing during plasma action. The state and composition of a sample surface were studied by SEM- and EXD-methodsΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ Π΄ΠΎΡΠ»Ρ–Π΄ΠΆΠ΅Π½ΡŒ Π·ΠΌΡ–Π½ΠΈ ΠΌΠΎΡ€Ρ„ΠΎΠ»ΠΎΠ³Ρ–Ρ— ΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Ρ– пластин ΠΊΡ€Π΅ΠΌΠ½Ρ–ΡŽ ΠΉ Π°Π»ΡŽΠΌΡ–Π½Ρ–ΡŽ ΠΏΡ€ΠΈ Π²ΠΏΠ»ΠΈΠ²Ρ– Π½Π° Π½ΠΈΡ… компрСсійними ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌΠΈ ΠΏΠΎΡ‚ΠΎΠΊΠ°ΠΌΠΈ, Ρ‰ΠΎ Π³Π΅Π½Π΅Ρ€ΡƒΡŽΡ‚ΡŒΡΡ квазістаціонарним ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌ ΠΏΡ€ΠΈΡΠΊΠΎΡ€ΡŽΠ²Π°Ρ‡Π΅ΠΌ Ρ‚ΠΈΠΏΡƒ ΠΌΠ°Π³Π½Ρ–Ρ‚ΠΎΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΉ компрСсор. ΠŸΡ€ΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡ‚Ρ€ΠΎΠ²Π°Π½ΠΎ ΠΌΠΎΠΆΠ»ΠΈΠ²Ρ–ΡΡ‚ΡŒ нанСсСння Π½Π° ΠΏΡ–Π΄ΠΊΠ»Π°Π΄ΠΊΠΈ наноструктурних ΠΌΠ΅Ρ‚Π°Π»Π΅Π²ΠΈΡ… ΠΏΠΎΠΊΡ€ΠΈΡ‚ΡŒ Π·Π° допомогою компрСсійних ΠΏΠΎΡ‚ΠΎΠΊΡ–Π².ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдований измСнСния ΠΌΠΎΡ€Ρ„ΠΎΠ»ΠΎΠ³ΠΈΠΈ повСрхности пластин крСмния ΠΈ алюминия ΠΏΡ€ΠΈ воздСйствии Π½Π° Π½ΠΈΡ… компрСссионными ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹ΠΌΠΈ ΠΏΠΎΡ‚ΠΎΠΊΠ°ΠΌΠΈ, Π³Π΅Π½Π΅Ρ€ΠΈΡ€ΡƒΠ΅ΠΌΡ‹ΠΌΠΈ квазистационарным ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹ΠΌ ускоритСлСм Ρ‚ΠΈΠΏΠ° ΠΌΠ°Π³Π½ΠΈΡ‚ΠΎΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹ΠΉ компрСссор. ΠŸΡ€ΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡ‚Ρ€ΠΈΡ€ΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ нанСсСния Π½Π° ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ наноструктурных мСталличСских ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠΉ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ компрСссионных ΠΏΠΎΡ‚ΠΎΠΊΠΎΠ²

    Energy characteristics of plasma streams, generated by MPC

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    In present paper, results of experimental investigations of energy characteristics of plasma stream, generated by magnetoplasma compressor (MPC) are presented. It is shown that total energy contained in the plasma stream strongly depends on the discharge current, mass flow rate and sort of working gas. Radial distributions of energy density in plasma streams for different MPC modes of operations and energy transfer efficiency from the acceleration channel to the plasma stream are investigated.ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… исслСдований энСргСтичСских характСристик ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹Ρ… ΠΏΠΎΡ‚ΠΎΠΊΠΎΠ², Π³Π΅Π½Π΅Ρ€ΠΈΡ€ΡƒΠ΅ΠΌΡ‹Ρ… ΠΌΠ°Π³Π½ΠΈΡ‚ΠΎΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹ΠΌ компрСссором (МПК). Показано, Ρ‡Ρ‚ΠΎ полная энСргия Π² ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΌ ΠΏΠΎΡ‚ΠΎΠΊΠ΅ сущСствСнно зависит ΠΎΡ‚ разрядного Ρ‚ΠΎΠΊΠ°, массового расхода ΠΈ сорта Ρ€Π°Π±ΠΎΡ‡Π΅Π³ΠΎ Π³Π°Π·Π°. Π’Π°ΠΊΠΆΠ΅ исслСдовано Ρ€Π°Π΄ΠΈΠ°Π»ΡŒΠ½ΠΎΠ΅ распрСдСлСниС плотности энСргии Π² ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΌ ΠΏΠΎΡ‚ΠΎΠΊΠ΅ ΠΈ коэффициСнт ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡ΠΈ энСргии ΠΎΡ‚ ΡƒΡΠΊΠΎΡ€ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ ΠΊΠ°Π½Π°Π»Π° Π² ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½Ρ‹ΠΉ ΠΏΠΎΡ‚ΠΎΠΊ Π² Ρ€Π°Π·Π½Ρ‹Ρ… Ρ€Π΅ΠΆΠΈΠΌΠ°Ρ… Ρ€Π°Π±ΠΎΡ‚Ρ‹ МПК.ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΈΡ… Π΄ΠΎΡΠ»Ρ–Π΄ΠΆΠ΅Π½ΡŒ Π΅Π½Π΅Ρ€Π³Π΅Ρ‚ΠΈΡ‡Π½ΠΈΡ… характСристик ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΡ… ΠΏΠΎΡ‚ΠΎΠΊΡ–Π², Ρ‰ΠΎ Π³Π΅Π½Π΅Ρ€ΡƒΡ” ΠΌΠ°Π³Π½Ρ–Ρ‚ΠΎΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΉ компрСсор (МПК). Показано, Ρ‰ΠΎ ΠΏΠΎΠ²Π½Π° СнСргія Π² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠΌΡƒ ΠΏΠΎΡ‚ΠΎΡ†Ρ– Π·Π½Π°Ρ‡Π½ΠΈΠΌ Ρ‡ΠΈΠ½ΠΎΠΌ Π·Π°Π»Π΅ΠΆΠΈΡ‚ΡŒ Π²Ρ–Π΄ розрядного струму, масової Π²ΠΈΡ‚Ρ€Π°Ρ‚ΠΈ Ρ‚Π° сорту Ρ€ΠΎΠ±ΠΎΡ‡ΠΎΠ³ΠΎ Π³Π°Π·Ρƒ. Π’Π°ΠΊΠΎΠΆ Π±ΡƒΠ»ΠΎ дослідТСно Ρ€Π°Π΄Ρ–Π°Π»ΡŒΠ½ΠΈΠΉ Ρ€ΠΎΠ·ΠΏΠΎΠ΄Ρ–Π» густини Π΅Π½Π΅Ρ€Π³Ρ–Ρ— Π² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠΌΡƒ ΠΏΠΎΡ‚ΠΎΡ†Ρ– Ρ– ΠΊΠΎΠ΅Ρ„Ρ–Ρ†Ρ–Ρ”Π½Ρ‚ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡Ρ– Π΅Π½Π΅Ρ€Π³Ρ–Ρ— Π²Ρ–Π΄ розрядного ΠΊΠ°Π½Π°Π»Ρƒ Π² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΉ ΠΏΠΎΡ‚Ρ–ΠΊ Π² Ρ€Ρ–Π·Π½ΠΈΡ… Ρ€Π΅ΠΆΠΈΠΌΠ°Ρ… Ρ€ΠΎΠ±ΠΎΡ‚ΠΈ МПК

    Investigations of compression plasma flows in quasistationary plasma accelerators by interference-shadowgrafy methods

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    Results of shadowgraphic and interferometric studies of physical processes in both a magnetoplasma compressor (MPC) and a two-stage quasistationary high-current plasma accelerator (QHPA) of P-50M type are presented. Use of these methods has enabled definition of basic gas- and thermodynamic parameters of plasma flows in such accelerators
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