22 research outputs found
Modification of multi-profile surfaces by compression plasma flows action of quasistationary high-current plasma accelerator
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
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
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 βmetal-siliconβ 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) βsilicide-siliconβ and βmonosilicide-disilicideβ 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
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
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.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ Π·ΠΌΡΠ½ΠΈ ΡΡΠ·ΠΈΠΊΠΎ-ΠΌΠ΅Ρ
Π°Π½ΡΡΠ½ΠΈΡ
Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΠ΅ΠΉ ΡΠΈΡΡΠ΅ΠΌ ΠΏΠΎΠΊΡΠΈΡΡΡ-ΠΏΡΠ΄ΠΊΠ»Π°Π΄ΠΊΠ° ΠΏΡΠΈ Π²ΠΏΠ»ΠΈΠ²Ρ Π½Π° Π½ΠΈΡ
ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΉΠ½ΠΈΠΌ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌ ΠΏΠΎΡΠΎΠΊΠΎΠΌ. ΠΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΎΠ²Π°Π½ΠΎ ΠΌΠΎΠΆΠ»ΠΈΠ²ΡΡΡΡ Π»Π΅Π³ΡΠ²Π°Π½Π½Ρ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»Ρ ΠΏΡΠ΄ΠΊΠ»Π°Π΄ΠΊΠΈ ΡΠΊ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠΌ ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄Π½ΡΠΎ Π½Π°Π½Π΅ΡΠ΅Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΠΈΡΡΡ, ΡΠ°ΠΊ Ρ ΡΠΎΠ±ΠΎΡΠΎΡ ΡΠ΅ΡΠΎΠ²ΠΈΠ½ΠΎΡ ΠΏΠ»Π°Π·ΠΌΠΈ, Ρ ΠΏΡΠΎΡΠ΅ΡΡ ΡΡΠ΄ΠΊΠΎΡΠ°Π·Π½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅ΠΌΡΡΡΠ²Π°Π½Π½Ρ Ρ ΠΏΠ΅ΡΠ΅Π·Π°ΡΠ²Π΅ΡΠ΄ΡΠ½Π½Ρ ΡΠΎΠ·ΠΏΠ»Π°Π²Π»Π΅Π½ΠΈΡ
ΠΏΡΠ΄ Π΄ΡΡΡ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΉΠ½ΠΎΠ³ΠΎ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΡ ΠΏΡΠΈΠΏΠΎΠ²Π΅ΡΡ
Π½ΡΡ
ΡΠ°ΡΡΠ².ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠΈΠ·ΠΈΠΊΠΎ-ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΡΠΈΡΡΠ΅ΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠ΅- ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠ° ΠΏΡΠΈ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΠΈ Π½Π° Π½ΠΈΡ
ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΈΠΎΠ½Π½ΡΠΌ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΌ ΠΏΠΎΡΠΎΠΊΠΎΠΌ. ΠΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ ΠΊΠ°ΠΊ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠΌ ΠΏΡΠ΅Π΄Π²Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π½Π°Π½Π΅ΡΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ, ΡΠ°ΠΊ ΠΈ ΡΠ°Π±ΠΎΡΠΈΠΌ Π²Π΅ΡΠ΅ΡΡΠ²ΠΎΠΌ ΠΏΠ»Π°Π·ΠΌΡ, Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΠΆΠΈΠ΄ΠΊΠΎΡΠ°Π·Π½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅ΠΌΠ΅ΡΠΈΠ²Π°Π½ΠΈΡ ΠΈ ΠΏΠ΅ΡΠ΅Π·Π°ΡΠ²Π΅ΡΠ΄Π΅Π²Π°Π½ΠΈΡ ΡΠ°ΡΠΏΠ»Π°Π²Π»Π΅Π½Π½ΡΡ
ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° ΠΏΡΠΈΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΡΠ»ΠΎΠ΅Π²
Nanostructured formations and coatings created on the surface of materials exposed to compression plasma flows
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-methodsΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ Π·ΠΌΡΠ½ΠΈ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΡΡ ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ ΠΏΠ»Π°ΡΡΠΈΠ½ ΠΊΡΠ΅ΠΌΠ½ΡΡ ΠΉ Π°Π»ΡΠΌΡΠ½ΡΡ ΠΏΡΠΈ Π²ΠΏΠ»ΠΈΠ²Ρ Π½Π° Π½ΠΈΡ
ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΉΠ½ΠΈΠΌΠΈ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌΠΈ ΠΏΠΎΡΠΎΠΊΠ°ΠΌΠΈ, ΡΠΎ Π³Π΅Π½Π΅ΡΡΡΡΡΡΡ ΠΊΠ²Π°Π·ΡΡΡΠ°ΡΡΠΎΠ½Π°ΡΠ½ΠΈΠΌ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌ ΠΏΡΠΈΡΠΊΠΎΡΡΠ²Π°ΡΠ΅ΠΌ ΡΠΈΠΏΡ ΠΌΠ°Π³Π½ΡΡΠΎΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΉ ΠΊΠΎΠΌΠΏΡΠ΅ΡΠΎΡ. ΠΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΎΠ²Π°Π½ΠΎ ΠΌΠΎΠΆΠ»ΠΈΠ²ΡΡΡΡ Π½Π°Π½Π΅ΡΠ΅Π½Π½Ρ Π½Π° ΠΏΡΠ΄ΠΊΠ»Π°Π΄ΠΊΠΈ Π½Π°Π½ΠΎΡΡΡΡΠΊΡΡΡΠ½ΠΈΡ
ΠΌΠ΅ΡΠ°Π»Π΅Π²ΠΈΡ
ΠΏΠΎΠΊΡΠΈΡΡ Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΉΠ½ΠΈΡ
ΠΏΠΎΡΠΎΠΊΡΠ².ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΏΠ»Π°ΡΡΠΈΠ½ ΠΊΡΠ΅ΠΌΠ½ΠΈΡ ΠΈ Π°Π»ΡΠΌΠΈΠ½ΠΈΡ ΠΏΡΠΈ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΠΈ Π½Π° Π½ΠΈΡ
ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΈΠΎΠ½Π½ΡΠΌΠΈ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΌΠΈ ΠΏΠΎΡΠΎΠΊΠ°ΠΌΠΈ, Π³Π΅Π½Π΅ΡΠΈΡΡΠ΅ΠΌΡΠΌΠΈ ΠΊΠ²Π°Π·ΠΈΡΡΠ°ΡΠΈΠΎΠ½Π°ΡΠ½ΡΠΌ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΌ ΡΡΠΊΠΎΡΠΈΡΠ΅Π»Π΅ΠΌ ΡΠΈΠΏΠ° ΠΌΠ°Π³Π½ΠΈΡΠΎΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΉ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡ. ΠΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ Π½Π°Π½Π΅ΡΠ΅Π½ΠΈΡ Π½Π° ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ Π½Π°Π½ΠΎΡΡΡΡΠΊΡΡΡΠ½ΡΡ
ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΠΎΡΠΎΠΊΠΎΠ²
Energy characteristics of plasma streams, generated by MPC
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.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΡ
ΠΏΠΎΡΠΎΠΊΠΎΠ², Π³Π΅Π½Π΅ΡΠΈΡΡΠ΅ΠΌΡΡ
ΠΌΠ°Π³Π½ΠΈΡΠΎΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΌ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΠΎΠΌ (ΠΠΠ). ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΠΎΠ»Π½Π°Ρ ΡΠ½Π΅ΡΠ³ΠΈΡ Π² ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΠ°Π·ΡΡΠ΄Π½ΠΎΠ³ΠΎ ΡΠΎΠΊΠ°, ΠΌΠ°ΡΡΠΎΠ²ΠΎΠ³ΠΎ ΡΠ°ΡΡ
ΠΎΠ΄Π° ΠΈ ΡΠΎΡΡΠ° ΡΠ°Π±ΠΎΡΠ΅Π³ΠΎ Π³Π°Π·Π°. Π’Π°ΠΊΠΆΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ ΡΠ°Π΄ΠΈΠ°Π»ΡΠ½ΠΎΠ΅ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΡΠ½Π΅ΡΠ³ΠΈΠΈ Π² ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅ ΠΈ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½Ρ ΠΏΠ΅ΡΠ΅Π΄Π°ΡΠΈ ΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΎΡ ΡΡΠΊΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠ°Π½Π°Π»Π° Π² ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΉ ΠΏΠΎΡΠΎΠΊ Π² ΡΠ°Π·Π½ΡΡ
ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΡΠ°Π±ΠΎΡΡ ΠΠΠ.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΅ΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΈΡ
Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ Π΅Π½Π΅ΡΠ³Π΅ΡΠΈΡΠ½ΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΡ
ΠΏΠΎΡΠΎΠΊΡΠ², ΡΠΎ Π³Π΅Π½Π΅ΡΡΡ ΠΌΠ°Π³Π½ΡΡΠΎΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΉ ΠΊΠΎΠΌΠΏΡΠ΅ΡΠΎΡ (ΠΠΠ). ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΠΎ ΠΏΠΎΠ²Π½Π° Π΅Π½Π΅ΡΠ³ΡΡ Π² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠΌΡ ΠΏΠΎΡΠΎΡΡ Π·Π½Π°ΡΠ½ΠΈΠΌ ΡΠΈΠ½ΠΎΠΌ Π·Π°Π»Π΅ΠΆΠΈΡΡ Π²ΡΠ΄ ΡΠΎΠ·ΡΡΠ΄Π½ΠΎΠ³ΠΎ ΡΡΡΡΠΌΡ, ΠΌΠ°ΡΠΎΠ²ΠΎΡ Π²ΠΈΡΡΠ°ΡΠΈ ΡΠ° ΡΠΎΡΡΡ ΡΠΎΠ±ΠΎΡΠΎΠ³ΠΎ Π³Π°Π·Ρ. Π’Π°ΠΊΠΎΠΆ Π±ΡΠ»ΠΎ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½ΠΎ ΡΠ°Π΄ΡΠ°Π»ΡΠ½ΠΈΠΉ ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ» Π³ΡΡΡΠΈΠ½ΠΈ Π΅Π½Π΅ΡΠ³ΡΡ Π² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠΌΡ ΠΏΠΎΡΠΎΡΡ Ρ ΠΊΠΎΠ΅ΡΡΡΡΡΠ½Ρ ΠΏΠ΅ΡΠ΅Π΄Π°ΡΡ Π΅Π½Π΅ΡΠ³ΡΡ Π²ΡΠ΄ ΡΠΎΠ·ΡΡΠ΄Π½ΠΎΠ³ΠΎ ΠΊΠ°Π½Π°Π»Ρ Π² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΉ ΠΏΠΎΡΡΠΊ Π² ΡΡΠ·Π½ΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΡΠΎΠ±ΠΎΡΠΈ ΠΠΠ
Investigations of compression plasma flows in quasistationary plasma accelerators by interference-shadowgrafy methods
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