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Wyświetlanie 1-15 z 268
Tytuł:
Analysis of unsteady boiling during high-temperatured body dipping in water
Autorzy:
Badur, J.
Bryk, M.
Powiązania:
https://bibliotekanauki.pl/articles/175170.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
boiling
high temperature
fluid
Opis:
In this paper, the analysis of sudden water phase change during high-temperature metal body dipping is presented. According to that purpose, the computational fluid dynamic analysis has been carried out. The nonstationarity and behavior of sudden water phase change has been examined. The calculation model consists of the solid domain (vessel and high-temperature metal) and fluid domain (liquid filling vessel). The metal body insertion to the fluid domain was obtained by the use of dynamic mesh. Special case of the dipping velocity, the metal body of temperature 723 K and fluid temperature 288 K. was examined. Moving on to calculations, the model containing basic conservation equation, expanded of turbulence and liquid evaporation equations has been used.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2017, 138; 75-88
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Calculations for Elastic and Thermodynamic Properties of NbN₂ under High Pressure
Autorzy:
Hou, Bao-Sen
Liu, Ke
Mao, Xiao-Chun
Tan, Jiao
Zhou, Xiao-Lin
Powiązania:
https://bibliotekanauki.pl/articles/1032591.pdf
Data publikacji:
2017-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
high temperature and high pressure
elastic constants
anisotropy
Debye temperature
NbN₂
Opis:
The structural and elastic properties of NbN₂ at high pressures were investigated through the first-principles calculation. Results indicate that NbN₂ is a potential hard material. NbN₂ meets mechanical stability criteria and possesses ductility within the pressure of 100 GPa. The elastic anisotropy under high pressure was achieved by the elastic anisotropy factors, which reduce with increasing pressure. Using the quasi-harmonic Debye model, we also investigated the thermodynamic properties of NbN₂.
Źródło:
Acta Physica Polonica A; 2017, 132, 4; 1363-1370
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and Applications of Silicon Carbide Power Devices in Power Electronics
Autorzy:
Kondrath, N.
Kazimierczuk, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/226774.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silicon carbide (SiC)
SiC properties
high voltage
high-temperature
high-frequency applications
high-temperature electronics
wide energy band-gap semiconductors
Opis:
Silicon carbide materials, with its high mechanical strength, high thermal conductivity, ability to operate at high temperatures, and extreme chemical inertness to most of the electrolytes, are very attractive for high-power applications. In this paper, properties, advantages, and limitations of SiC and conventional Si materials are compared. Various applications, where SiC power devices are attractive, are discussed.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 3; 231-236
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of dense deuterium plasma pulses on materials in Plasma Focus device
Autorzy:
Ivanov, L.
Pimenov, V.
Maslyaev, S.
Dyomina, E.
Gribkov, V.
Mezzetti, F.
DeChiara, P.
Powiązania:
https://bibliotekanauki.pl/articles/146708.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high-temperature plasma
material science
plasma focus
Opis:
Experiments on the influence of high-temperature plasma nanosecond pulse radiation, as generated in plasma focus device, on the W-Cu pseudoalloy, V-35at%Ti alloy, austenitic chromium-manganese 10Cr12Mn20W and 25Cr12Mn20W steels have been carried out. Features of damages, phase-structural transformations and chemical content changes in those materials under such irradiation were investigated.
Źródło:
Nukleonika; 2000, 45, 3; 203-207
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sorption properties of stainless steel membranes impregnated with titanium dioxide sorbent
Autorzy:
Bilewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/147324.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high temperature adsorption
titanium oxide
impregnated membrane
Opis:
High-temperature sorption of corrosion products from primary cooling circuit is an effective method for radiation reduction in pressurize and boiling reactor plants. We have developed a suitable high temperature resistant adsorbent by impregnating a porous stainless steel membrane with titanium oxide. The adsorption studies of corrosion products in soluble and insoluble forms indicate that the stainless steel membrane impregnated with TiO2 combines high affinity of TiO2 for transition metal cations with a high mechanical stability of the porous steel membrane under high-temperature and highpressure conditions.
Źródło:
Nukleonika; 2004, 49, 4; 163-165
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-temperature instability processes in SOI structures and MOSFETs
Autorzy:
Nazarov, A.N.
Kilchytska, V.I.
Vovk, Ja.N.
Colinge, J.P.
Powiązania:
https://bibliotekanauki.pl/articles/307654.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
SOI
MOSFET
high-temperature
instability
ZMR
SIMOX
Opis:
The paper reviews the problems related to BOX high-temperature instability in SOI structures and MOSFETs. The methods of bias-temperature research applied to SOI structures and SOI MOSFETs are analysed and the results of combined electrical studies of ZMR, and SIMOX SOI structures are presented. The studies are focused mainly on electrical discharging processes in the BOX at high temperature and its link with new instability phenomena such as high-temperature kink effects in SOI MOSFETs.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 1; 18-26
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nickelization Effect on the High Temperature Tensile Properties of Mg-0.7Y2O3 Nanocomposite
Autorzy:
Hassan, S. F.
Tun, K. S.
Patel, F.
Al-Aqeeli, N.
Gupta, M.
Powiązania:
https://bibliotekanauki.pl/articles/357046.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium
nanocomposite
high-temperature
tensile strength
deformation
Opis:
In this study, high performance magnesium-yttria nanocomposite’s room temperature, strength and ductility were significantly enhanced by the dispersion of nano-sized nickel particles using powder blending and a microwave sintering process. The strengthening effect of the dispersed nano-sized nickel particles was consistent up to 100°C and then it gradually diminished with further increases in the test temperature. The ductility of the magnesium-yttria nanocomposite remained unaffected by the dispersed nano-sized nickel particles up to 100°C. Impressively, it was enhanced at 150°C and above, leading to the possibility of the near net shape fabrication of the nanocomposite at a significantly low temperature.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1411-1415
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The High Temperature Oxidation Stability of STS434L/Silicon Oxide Compacts
Autorzy:
Park, J. W.
Ko, B. H.
Jung, W. Y.
Park, D. K.
Ahn, I. S.
Powiązania:
https://bibliotekanauki.pl/articles/352481.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high-temperature oxidation stability
metallic oxide
densification
Opis:
In order to improve the high-temperature oxidation stability, a study of 434L sintered stainless steel was focused on the effect of addition of metallic oxides to form stable oxide film on the inner particle surface. In this paper, oxidation behavior of 434L compacted parts in accordance with the addition of metallic oxides were discussed with high temperature oxidative reaction, and sintering behavior analysis under 950°C. Oxidation weight gains of 434 L have increased as a form of parabolic laws. The hightemperature oxidation resistance was improved by the mixed addition of amorphous SiO2 and silica up to 2wt.%. The oxidation rate was decreased and kept constant after 60 hours. It was caused by the restraint succeeding oxidation due to the stable oxide formation of Cr2SiO4 phases on the particle surface to prevent densification and inhibition the external diffusion of Cr. High-temperature stability was confirmed by the electrical resistivity maintains the constant value of 1.3×10-2 Ω ·cm when the silica added less than 2w/o to 1w/o A-SiO2 added 434L.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 307-313
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High - temperature oxidation resistance in yttrium implanted stainless steel
Autorzy:
Barlak, M.
Piekoszewski, J.
Werner, Z.
Sartowska, B.
Waliś, L.
Starosta, W.
Kierzek, J.
Kowalska, E.
Wilhelm, R. A.
Pochrybniak, C.
Woźnica, M.
Powiązania:
https://bibliotekanauki.pl/articles/146785.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high-temperature oxidation resistance
ion implantation
yttrium
Opis:
Austenitic AISI 304, 316L and ferritic 430 stainless steels were implanted with yttrium to fluences ranging between 1 x 1015 and 5 x 1017 ions/cm2. The samples were subjected to oxidation in air at a temperature of 1000 centigrade for a period of 100 h and next examined by stereoscopic optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX) and Rutherford back scattering spectrometry (RBS). The results obtained with the use of ion implantation are discussed.
Źródło:
Nukleonika; 2012, 57, 4; 473-476
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-channel X-ray detection head for diagnostics of plasma in noisy environment
Autorzy:
Ryć, L.
Kaczmarczyk, J.
Martinez, J. F.
Scholz, M.
Słysz, M.
Powiązania:
https://bibliotekanauki.pl/articles/148717.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high-temperature plasma
semiconductor detector
X-ray diagnostics
Opis:
A compact, three-channel, noise-resistant detection head based on semiconductor detectors has been built for the diagnostics of X-ray emission from plasmas. It is useful in the energy range of 0.5–20 keV.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 95-97
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwagi do raportu Zespołu Ministerstwa Energii ds. reaktora wysokotemperaturowego
Remarks to the Report of the Ministry of Energy Committee on High-Temperature Reactor
Autorzy:
Mikulski, A.
Powiązania:
https://bibliotekanauki.pl/articles/214422.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
reaktory wysokotemperaturowe
HTGR
NCBJ
high temperature reactor
NCNR
Opis:
Raport Zespołu ds. analizy i przygotowania warunków do wdrożenia wysokotemperaturowych reaktorów jądrowych opublikowany przez Ministerstwo Energii w styczniu 2017 r. rekomenduje rozpoczęcie przygotowań do wykorzystania reaktorów wysokotemperaturowych chłodzonych gazem (HTGR) do produkcji ciepła technologicznego w przemyśle. Ten typ reaktora zostały wybrany po analizie wielu innych typów. Przewiduje się wybudowanie najpierw reaktora badawczego o mocy 10 MWt do 2025 r., a następnie pierwszego reaktora produkcyjnego do 2031 r. we współpracy z wybranym kontrahentem zagranicznym.
Report of the Committee for Analysis and Preparation of Conditions for Deployment of High-Temperature Nuclear Reactors (HTGR) was published in January 2017 by the Ministry of Energy. The Committee recommends to begin preparation of HTGR deployment for production of industrial heat. This type of reactor was selected as the best option after having analyzed many other types. It is foreseen that the construction of the first research reactor of 10 MWt power will be carried out until year 2025 and later, of an industrial reactor until 2031 with cooperation of selected foreign company.
Źródło:
Postępy Techniki Jądrowej; 2018, 1; 21-25
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-Seismic Behavior of Welded Box Section Column Considering Welding Residual Stress at High Temperature
Autorzy:
Fu, Yadi
Dai, Xueyu
Zhang, Huidi
Wang, Yimin
Powiązania:
https://bibliotekanauki.pl/articles/2203725.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
box section
high temperature
residual stress
hysteretic behavior
Opis:
To study the anti-seismic performance of steel structure under high temperature, the finite element analysis software ABAQUS was used to study the seismic performance of Q235 steel welded box section column at service stage under normal temperature and high temperature fire. The effects of welding residual stress, slenderness ratio, width thickness ratio and axial load level on the hysteretic behavior of columns were analyzed and the stable bearing capacity and hysteretic performance of the column under high temperature were investigated. The results show that the maximum bearing capacity of the column decreases with the increase of the residual stress peak value. With the increase of temperature, a decrease in the maximum bearing capacity of columns under constant axial force and horizontal cyclic load and an increase in the ductility occur.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 5--13
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Temperature Oxidation Property of SiC Coating Layer Fabricated by Aerosol Deposition Process
Autorzy:
Ham, G.-S.
Kim, S.-H.
Park, J.-Y.
Lee, K.-A.
Powiązania:
https://bibliotekanauki.pl/articles/352142.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silicon carbide
aerosol deposition
coating
high temperature oxidation
Opis:
This study investigated the high temperature oxidation property of SiC coated layer fabricated by aerosol deposition process. SiC coated layer could be successfully manufactured by using pure SiC powders and aerosol deposition on the Zr based alloy in an optimal process condition. The thickness of manufactured SiC coated layer was measured about 5 μm, and coating layer represented high density structure. SiC coated layer consisted of α-SiC and β-SiC phases, the same as the initial powder. The initial powder was shown to have been crushed to the extent and was deposited in the form of extremely fine particles. To examine the high temperature oxidation properties, oxidized weight gain was obtained for one hour at 1000°C by using TGA. The SiC coated layer showed superior oxidation resistance property than that of Zr alloy (substrate). The high temperature oxidation mechanism of SiC coated layer on Zr alloy was suggested. And then, the application of aerosol deposited SiC coated layer was also discussed.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1347-1351
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Temperature Corrosion Performance of Carbon Steel Coated with Iron Aluminide in Mixture of O2 and SO2 Atmosphere
Autorzy:
Omranian-Mohammadi, P.
Raiszadeh, R.
Shahverdi, H. R.
Powiązania:
https://bibliotekanauki.pl/articles/352419.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
iron aluminide
high temperature corrosion
plain carbon steel
Opis:
In this investigation the surface of an aluminized sample of plain carbon steel was melted and alloyed using a tingsten inert gas (TIG) welding process to produce iron-aluminide intermetallic phases on the surface. The produced coating was then characterized by SEM and EDS and its high-temperature properties in O2 + 1%SO2 gas were examined. The results showed that the Fe3 Al coating produced could protect the substrate as it was subjected to the corroding gases at 700°C due to the formation of an alumina layer between the substrate and an outer layer of Fe2 O3 . At 900°C, the coating could only protect the substrate for 64 h. The lack of further protection at this temperature is attributed to the decrease in the protective properties of alumina with an increase in its temperature and the lack of presence of enough Al atoms in the coating for the repair of the defects formed in the alumina layer.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 529-538
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and comparison of superconducting linear actuators for highly dynamic motion
Autorzy:
de Bruyn, B. J. H.
Jansen, J. W.
Lomonova, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/141560.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
linear motors
loss calculation
high-temperature superconductors
HTS
Opis:
This paper presents a numerical modeling method for AC losses in highly dynamic linear actuators with high temperature superconducting (HTS) tapes. The AC losses and generated force of two actuators, with different placement of the cryostats, are compared. In these actuators, the main loss component in the superconducting tapes are hysteresis losses, which result from both the non-sinusoidal phase currents and movement of the permanent magnets. The modeling method, based on the H-formulation of the magnetic fields, takes into account permanent magnetization and movement of permanent magnets. Calculated losses as function of the peak phase current of both superconducting actuators are compared to those of an equivalent non-cryogenic actuator.
Źródło:
Archives of Electrical Engineering; 2015, 64, 4; 559-570
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 268

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