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Wyszukujesz frazę "81.05.Fb" wg kryterium: Temat


Tytuł:
Thermal Annealing Effect on the Morphology of Inkjet Printed Polymer:Fullerene Composites Solar Cells
Autorzy:
Fauzia, V.
Umar, A.
Salleh, M.
Yahaya, M.
Powiązania:
https://bibliotekanauki.pl/articles/1490940.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
88.40.jr
81.05.Fb
Opis:
One of critical factor in determining the performance of solar cells is the morphology of the active layer. The drying process of the active layer prepared by inkjet printing technique plays a key role in obtaining high quality surface morphology. This paper reports the effect of thermal annealing on the morphology of printed active layer. The printed active layer is a blend of poly(3-octylthiophene-2,5-diyl) and (6,6)-phenyl $C_{71}$ butyric acid methyl ester dissolved in a mixture of dichlorobenzene:mesitylene. The printed films were then annealed at three different temperatures, namely 120, 140, and 160C for 60 min to obtain the best performance of solar cells. It was found that the performance of solar cells strongly depends on the annealing temperature. The devices with the active layer annealed at 140C exhibits the highest performance with short circuit current density and open circuit voltage as high as 2.88 μA/$cm^2$ and 0.85 V, respectively. The effect of annealing on the properties of printed active layer will be discussed.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 155-157
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A DNA Biosensor Based Interface States of a Metal-Insulator-Semiconductor Diode for Biotechnology Applications
Autorzy:
Al-Ghamdi, A.
Al-Hartomy, O.
Gupta, R.
El-Tantawy, F.
Taskan, E.
Hasar, H.
Yakuphanoglu, F.
Powiązania:
https://bibliotekanauki.pl/articles/1489876.pdf
Data publikacji:
2012-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Jn
81.05.Fb
73.30.+y
Opis:
We studied how a DNA sensor based on the interface states of a conventional metal-insulator-semiconductor diode can be prepared for biotechnology applications. For this purpose, the p-type silicon/metal diodes were prepared using $SiO_2$ and DNA layers. The obtained results were analyzed and compared with interfaces of DNA and $SiO_2$. It is seen that the ideality factor (1.82) of the $Al//p-Si//SiO_2//DNA//Ag$ diode is lower than that (3.31) of the $Al//p-Si//SiO_2//Ag$ diode. This indicates that the electronic performance of DNA/Si junction was better than that of $SiO_2//Si$ junction. The interface states of the $Al//p-Si//SiO_2//DNA//Ag$ and $Al//p-Si//SiO_2//Ag$ junctions were analyzed by conductance technique. The obtained D_{it} values indicate that the DNA layer is an effective parameter to control the interface states of the conventional Si based on metal/semiconductor contacts. Results exhibited that DNA based metal-insulator-semiconductor diode could be used as DNA sensor for biotechnology applications.
Źródło:
Acta Physica Polonica A; 2012, 121, 3; 673-677
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taguchi Approach to Tribological Behaviour of Chopped Carbon Fiber-Reinforced Epoxy Composite Materials
Autorzy:
Ozsoy, N.
Ozsoy, M.
Mimaroglu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1047489.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
07.05.Fb
Opis:
Chopped carbon fiber-reinforced epoxy composites were fabricated and tested for tribological behaviour. Wear behaviour of composites was studied using pin-on-disc wear tester device. The design of experiment, using Taguchi method, was employed to analyse the results. Signal to noise ratio and analysis of variance (ANOVA) were used to determine the influence of parameters on the wear rate and coefficient of friction.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 846-848
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In Situ Investigation of Microstructure Evolution during Solidification of Mg10CaxGd (x=5, 10, 20) Alloys
Autorzy:
Mendis, C.
Tolnai, D.
Stark, A.
Schell, N.
Kainer, K.
Hort, N.
Powiązania:
https://bibliotekanauki.pl/articles/1402097.pdf
Data publikacji:
2015-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.30.Fb
Opis:
Mg-Ca-Gd based alloys are investigated as a potential alloy for degradable biomaterials with some promising results. In this investigation the Mg10CaxGd (x=5, 10, 20) were investigated with synchrotron radiation X-ray diffraction during solidification to follow the phase evolution at two different cooling rates at 5 and $50 K \text{min}^{-1}$. All three alloys show formation of α -Mg followed by Mg₂Ca phase, while only Mg10Ca20Gd alloy contained Mg₅Gd phase during solidification. During cooling α -Mg was first observed between 628 and 632°C at a cooling rate of $5 K \text{min}^{-1}$ while this decreased to 620-628°C with the increase in cooling rate to $50 K \text{min}^{-1}$. The change in cooling rate from $5$ to $50 K \text{min}^{-1}$ did not change the types of intermetallic phases observed but resulted in suppressing temperatures at which the intermetallic phases were first detected.
Źródło:
Acta Physica Polonica A; 2015, 128, 4; 606-610
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-Similar Solidification of Binary Alloys
Autorzy:
Alexandrov, D.
Ivanov, A.
Malygin, A.
Powiązania:
https://bibliotekanauki.pl/articles/1808056.pdf
Data publikacji:
2009-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.05.+e
81.30.Fb
Opis:
The self-similar crystallization process of a binary mixture from a cooled boundary is studied on the basis of two models with a planar front and mushy layer. Approximate analytical solutions of the process describing the solidification with a mushy layer are found. The theory under consideration is in good agreement with experiments carried out by Huppert and Worster for ice growing from aqueous salt solutions.
Źródło:
Acta Physica Polonica A; 2009, 115, 4; 795-799
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical Solution for a Problem of Directional Solidification in a Ternary System
Autorzy:
Alexandrov, D.
Ivanov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1808053.pdf
Data publikacji:
2009-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.05.+e
81.30.Fb
Opis:
This paper is devoted to new analytic results relating to the nonstationary dynamics of directional solidification of ternary solutions with two moving layers of the phase transition lying between solid and liquid phases. Explicit analytical solutions of the problem under consideration are constructed on the basis of laboratory experiments carried out by Aitta, Huppert and Worster.
Źródło:
Acta Physica Polonica A; 2009, 115, 4; 786-790
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mushy Layer Formation during Solidification οf Binary Alloys from a Cooled Wall: the Role of Boundary Conditions
Autorzy:
Alexandrova, I.
Alexandrov, D.
Aseev, D.
Bulitcheva, S.
Powiązania:
https://bibliotekanauki.pl/articles/1808055.pdf
Data publikacji:
2009-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.05.+e
81.30.Fb
Opis:
Motivated by metallurgical and geophysical applications we present a mathematical model describing the process of unidirectional solidification of binary melts or solutions, which is based on the classical Stefan thermodiffusion theory with a planar front up to a time of mushy layer initiation and on the quasi-equilibrium theory of solidification with a constitutionally supercooled region afterwards. The role of boundary conditions imposed at the cooled wall is studied in terms of heat flux coefficients describing ultimately nonlinear dynamics of the process.
Źródło:
Acta Physica Polonica A; 2009, 115, 4; 791-794
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Applications of the Image Analysis in the Metal Material Science
Autorzy:
Odanović, Z.
Đurđević, M.
Krstić Pavlović, J.
Arsić, M.
Katavić, B.
Powiązania:
https://bibliotekanauki.pl/articles/1490882.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.30.Fb
81.40.Cd
Opis:
In different areas of science such as medicine, biology and engineering the image analysis is widely used. Quantitative measuring by the image analysis has also found application in metal materials science, especially in metallographic microstructure analysis. The measuring of the linear and area dimensions of the microconstituents in the metal material structure performed by the image analysis is presented in the paper. The effects of the heat treatment temperature on the brittle phase content in the structure of the heat resistant Ni-Cr-Co-W alloy were analysed. Investigation of the influence of the alloying elements content in the Al alloys for automotive application, on dendrite arm spacing in the cast structure are also presented. Obtained results of the quantitative measured dimensions have shown direct impact of the process parameters on the analysed metals microstructure characteristics. All tests were performed by the light optical microscope with automatic image analyser. Presented experimental results are based on a large number of measurements. A statistical analysis was performed and a high correlation of the results was obtained. For each of the presented investigations and analyzed phenomenon, a statistical mathematical model is suggested with the boundary conditions defined by the investigated intervals of variables.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 111-113
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Parameters on Dry Sliding of Chopped Bamboo Reinforced Epoxy Composites Based on the Taguchi Method
Autorzy:
Ozsoy, N.
Ozsoy, M.
Mimaroglu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1191719.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
07.05.Fb
62.20.Qp
Opis:
Chopped bamboo-reinforced epoxy composites were fabricated and tested to investigate their tribological properties. Three different weight fractions of 6%, 8% and 10% were used as reinforcement in the composites. Wear behaviour of composites was investigated by pin on disc wear testing device. To analyse the results the design of experiments (DOE) approach by using the Taguchi method was employed. Three different parameters (load, sliding speed, weight fractions) with three levels were chosen in design of experiments. Signal to noise ratio and analysis of variance (ANOVA) were used to investigate the influence of parameters on the wear rate and the coefficient of friction. According to the results, load was the most effective parameter for both wear rate and coefficient of friction.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 687-689
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Parameters on Tribological Behaviour of E-Glass Fiber Reinforced Epoxy Composites
Autorzy:
Ozsoy, N.
Ozsoy, M.
Mimaroglu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402531.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
07.05.Fb
62.20.Qp
Opis:
E-glass fiber reinforced epoxy composites were fabricated by hand lay up method and tested for investigating tribological behaviours. Wear behaviours of composites 0°, 90° and [0°/90°] oriented were investigated by pin on disc wear tester device for a constant distance (1000 m) and the design of experiments approach using the Taguchi method was employed. The tests were conducted sliding against a steel disc (60 HRC) under different sliding and loading conditions. Signal to noise ratio and analysis of variance (ANOVA) were used to investigate the influence of parameters on the wear rate and coefficient of friction.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-55-B-58
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical and Tribological Behaviour of Chopped E-Glass Fiber-Reinforced Epoxy Composite Materials
Autorzy:
Ozsoy, N.
Ozsoy, M.
Mimaroglu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1031191.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
07.05.Fb
62.20.Qp
81.70.Bt
Opis:
Chopped E-glass fiber-reinforced epoxy composites (10%, 30% and 50%) were fabricated and their mechanical and tribological behaviour was investigated. Three-point bending tests were performed according to the ASTMD790 and tensile tests were performed according to the ASTMD638 standards. Impact tests and hardness measurements of the composites were also carried out. Wear behaviour of composites was studied using pin on disc wear testing device. The design of experiments approach, using Taguchi method, was employed to analyze the results. Signal-to-noise ratio and analysis of variance were used to determine the influence of parameters on the wear rate and coefficient of friction.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 852-856
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Feederless Casting Limits by Thermal Analysis in Cast Iron
Autorzy:
Erturk, S.
Kumruoglu, L.
Ozel, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030308.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.30.-t
81.30.Fb
81.70.Pg
Opis:
In this study the determinations of melt quality was carried out by thermal analysis of ductile iron. The aim of the study was to determine the limits of feederless casting after the determination of inoculation quality in cast iron. Production method of pouring into a sand mold in the entirety and without using feeder systems has been investigated. Forms of the solidification and volume change have been investigated with simulation program as functions of inoculation quality, type of resin in the mold and mold rigidity. Results of the analysis have been compared with the results of experimental iron casting.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 370-373
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anisotropic Phase Field Model of Heteroepitaxial Growth
Autorzy:
Hoang, Dieu
Beneš, M.
Stráský, J.
Powiązania:
https://bibliotekanauki.pl/articles/1402067.pdf
Data publikacji:
2015-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.10.Aj
05.70.Ln
81.40.Jj
81.30.Fb
Opis:
We study the heteroepitaxial growth of thin layers by means of the modified phase-field model with the incorporated anisotropy. The influence of elastic and surface energies on the layer growth is considered. For numerical solution of the model, an explicit numerical scheme based on the finite element method is employed. The obtained computational results with various anisotropy settings demonstrate the anisotropic thin-layer pattern growth.
Źródło:
Acta Physica Polonica A; 2015, 128, 4; 520-522
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Analysis of the Rapid Solidification Process of NiTi Binary Alloy
Autorzy:
Ternik, P.
Zadravec, M.
Svetec, M.
Rudolf, R.
Powiązania:
https://bibliotekanauki.pl/articles/1402311.pdf
Data publikacji:
2015-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.Ja
81.30.Fb
44.05.+e
Opis:
The objective of the present work is to analyse the solidification process of NiTi binary alloy. The physical medium is taken as an incompressible fluid where the heat is transferred by conduction and convection, including the thermal phase change phenomenon. The last one is modelled by the improvement procedure called enthalpy-porosity formulation, where the liquid-solid mushy zone is treated as a porous zone with porosity equal to the liquid fraction. The numerical model is based on the finite volume method in body fitted coordinates with a SIMPLER scheme to couple the pressure and velocity fields. The results are presented for the velocity and temperature field, as well as for the NiTi mass fraction during the solidification process.
Źródło:
Acta Physica Polonica A; 2015, 128, 1; 43-47
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of phase transformations in inconel 625 alloy during annealing
Autorzy:
Petrzak, P.
Kowalski, K.
Blicharski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1152530.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.66.Dk
64.75.Nx
81.05.Bx
81.30.Fb
Opis:
The investigation focused on the characterization of the microstructure and chemical composition changes after annealing. The research was conducted on the Inconel 625 weld overlay deposited on a boiler steel. The annealing was performed for 10 h at temperatures from 600 to 1000°C. The microstructure and chemical composition were examined by scanning electron microscope and transmission electron microscope equipped with an energy dispersive X-ray spectrometer. Weld overlays were produced by an innovative method of cold metal transfer.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 1041-1044
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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