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Wyszukujesz frazę "75.50.Bb" wg kryterium: Temat

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Influence of Microstructure Evolution on the Coercive Forces in Low Silicon Non-Oriented Steels
    Autorzy:
    Petryshynets, I.
    Kovac, F.
    Stoyka, V.
    Boruta, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535233.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    74.25.Ha
    75.50.Bb
    75.50.Gg
    Opis:
    The magnetic properties and their dependence on the peculiarity of microstructure in low silicon non-oriented electrotechnical steels were studied in the present work. The estimation of dc magnetic properties of electrical steels was carried out by measurements of coercive forces. It was shown that the coercive force change in silicon steels is dependent on change of average grain size, crystallographic texture and homogeneity of microstructure of the materials. It was revealed that the steels possessing columnar or huge grained microstructure had the lowest measured values of coercive forces. The materials with such microstructure are characterized by a domination of (100) 〈0vw〉 crystallographic orientation.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 1013-1014
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tracking the Evolution of Abnormal Grain Growth in Grain-Oriented Electrical Steels by Coercivity Measurements
    Autorzy:
    Stoyka, V.
    Kovac, F.
    Petryshynets, I.
    Schindler, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535242.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    75.20.En
    75.50.Bb
    75.50.Gg
    Opis:
    The measurements of coercivity were utilised to investigate the main evolution stages of abnormal grain growth in grain-oriented electrical steels. The investigated grain-oriented steels were taken from industrial line after final cold rolling. The steels were subjected to short time annealing at elevated temperatures with high heating rates. The coercivity measurements carried out within the present work were confronted with microstructure and texture analysis in order to show the direct dependence of the measured coercivities on metallurgical characteristics of the investigated steel. It is shown that the coercivity measurements technique could capture main microstructural changes taking place in recrystallization.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 1015-1017
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of $Ni_3Fe$ Nanoparticles Prepared by Chemical Method
    Autorzy:
    Zábranský, K.
    Schneeweiss, O.
    Pizůrová, N.
    David, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1507208.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    61.46.-w
    75.20.En
    75.50.Bb
    Opis:
    $Ni_3Fe$ nanoparticles prepared by calcination of the iron-nickel oxalate were investigated by X-ray diffraction, Mössbauer spectroscopy and magnetic measurements. The high temperature X-ray diffraction shows two stages of transformation of oxalate: (i) amorphization and (ii) formation of nanocrystalline $Ni_3Fe$ particles. The development of coercivity, magnetization and mean coherence length ( ≈ particle size) is discussed.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 785-786
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon-Encapsulated Magnetic Nanoparticles Based on Fe, Mn, and Cr for Spintronics Applications
    Autorzy:
    Szczytko, J.
    Osewski, P.
    Bystrzejewski, M.
    Borysiuk, J.
    Grabias, A.
    Huczko, A.
    Lange, H.
    Majhofer, A.
    Twardowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047686.pdf
    Data publikacji:
    2007-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.-g
    75.75.+a
    75.20.En
    75.30.Cr
    75.50.Bb
    Opis:
    We succeeded in the arc-plasma synthesis of carbon-encapsulated Fe, Cr, and Mn-based nanoparticles. The transmission electron microscopy, Mössbauer spectra (of iron) and SQUID magnetometry results demonstrate that the products of the synthesis contain metals and its carbides. The nanoparticles show ferromagnetic or superparamagnetic behavior at high temperatures, which is demanded for nano-spintronics applications.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 2; 305-310
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influences of Production Method and Minor Chemical Composition Changes on the Microstructure of the Alloy: $Fe_{62-x} Co_{10} Y_8 Mo_x B_{20}$ (where x=1 or 2)
    Autorzy:
    Nabiałek, M.
    Garus, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398367.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    In this work, the results of studies concerning the structure of polycrystalline and amorphous alloys are presented. The samples were produced in a single-step production process, using two different production methods, and under a protective argon atmosphere. The quenching speed of the molten alloy was different for each of the production methods. Samples were subjected to analysis using X-ray diffractometry, scanning electron microscopy, and computer tomography. It has been shown that the samples manufactured with a higher cooling rate feature an amorphous structure; On the other hand, the samples obtained using the method with the lower cooling speed consist of crystallites of three crystalline phases with sizes of the order of μm. The amorphous samples exhibited a varied fracture surface as well as an increase in the contribution of pores to their volume, in comparison to the samples obtained at the lower cooling speed.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1010-1012
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Heat Treatment on Irreversible Structural Relaxation in Bulk Amorphous Fe₆₁Co₁₀Ti₃Y₆B₂₀ Alloy
    Autorzy:
    Błoch, K.
    Nabiałek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386504.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    Amorphous materials contain structural defects, which play a key role in the magnetization process within the condition known as the "approach to ferromagnetic saturation". This paper presents the results of magnetization studies, carried out on bulk Fe₆₁Co₁₀Ti₃Y₆B₂₀ alloy when under the influence of a strong magnetic field. The alloy samples were obtained in the form of a rod 1 mm in diameter, and tested in the as-quenched state and after an isothermal annealing process, at a temperature below the crystallization temperature. It was observed that the heat treatment, carried out below crystallization temperature Tₓ, leads to irreversible structural relaxations, specifically reorganizing the atomic configuration within the volume of the alloy into an amorphous structure.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 442-444
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Relaxation in the Amorphous Alloys: FeMeMoCrNbB (where Me = Ni or Co)
    Autorzy:
    Rzącki, J.
    Błoch, K.
    Walters, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032768.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    In this paper, the results of structural and magnetic investigations are presented for the following amorphous alloys: FeMeMoCrNbB (where Me = Ni or Co). The structural investigations were performed using X-ray diffractometry. It was found that the investigated samples were amorphous in the as-cast state. The magnetisation was measured within magnetic fields ranging from 0 to 1 T using a vibrating sample magnetometer. Investigation of the "magnetisation in the area close to ferromagnetic saturation" showed that the magnetisation process in strong magnetic fields is connected with the rotation of magnetic moments in the vicinity of defects, which are the sources of short-range stresses. Analysis of the high-field magnetization curves facilitated the calculation of the spin-wave stiffness parameter.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 720-722
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Magnetic Properties of the Alloys $Fe_{60}Co_{10}W_xMo_{2}Y_{8}B_{20-x}$ (x=0, 1, 2)
    Autorzy:
    Garus, J.
    Garus, S.
    Nabiałek, M.
    Szota, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375380.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    The aim of this paper were studies of the structure and magnetic properties of the bulk $Fe_{60}Co_{10}W_xMo_{2}Y_{8}B_{20-x}$ (x=0, 1, 2) alloys. Ingots of the alloys were prepared by arc melting of high purity elements in an argon atmosphere. The samples in the form of plates were obtained by a rapid solidification of liquid metal in a copper mold cooled with water. Topography of produced samples were examined using a ZEISS SUPRA 35 high resolution scanning electron microscope. Furthermore, using a vibrating sample magnetometer the magnetization in high magnetic fields was studied. Moreover, from initial magnetization curves the parameters related with the Holstein-Primakoff paraprocess were determined.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 954-956
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Study of Magnetization in Strong Magnetic Fields for Alloys $Fe_{60}Co_{10}W_xNb_2Y_{8}B_{20-x}$ (x=0, 1)
    Autorzy:
    Garus, S.
    Nabiałek, M.
    Błoch, K.
    Garus, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375468.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    The study analyzed the influence of structural defects on the process of magnetization in the area called the approach to ferromagnetic saturation for bulk $Fe_{60}Co_{10}W_xNb_2Y_{8}B_{20-x}$ (x=0, 1) alloys. For this purpose, the magnetization studies were performed in the fields range of 0 T to 2 T using a LakeShore vibrating magnetometer. On the basis of the Kronmüller theory an analysis of the magnetization curves was conducted and the type of occurring structural defects in the studied alloys was established. Then, using a Monte Carlo method the effective anisotropy of the tested samples was designated.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 957-959
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Heat Treatment on Soft Magnetic Properties of the $Fe_{60}Co_{10}Mo_{2}Y_{8}B_{20}$ Alloy
    Autorzy:
    Garus, S.
    Nabiałek, M.
    Garus, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375479.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    This paper presents the results of studies on the magnetic properties of the $Fe_{60}Co_{10}Mo_{2}Y_{8}B_{20}$ alloy. The samples were fabricated in the form of plates by the injection-casting method. The structure of the investigated alloy, in the as-quenched state and after annealing, was verified by using X-ray diffractometry. The magnetization curves as a function of temperature were measured by a force magnetometer. From thermomagnetic curves the Curie temperature of the alloy was determined. As a critical parameter β was chosen to be equal to 0.36 for these calculations, it confirmed that the alloys may be considered as ferromagnetic of the Heisenberg type. Additionally, using a vibrating sample magnetometer the magnetization and coercivity field were studied (in magnetic field up to 2 T).
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 960-962
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approach to Ferromagnetic Saturation for the Bulk Amorphous Alloy: $(Fe_{0.61}Co_{0.10}Zr_{0.025}Hf_{0.025}Ti_{0.02}W_{0.02}B_{0.20})_{97}Y_{3}$
    Autorzy:
    Błoch, K.
    Nabiałek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386293.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.50.Kj
    75.30.Ds
    75.20.En
    75.47.Np
    75.50.Bb
    75.60.Ej
    Opis:
    The aim of this paper was to conduct studies concerning the magnetization of bulk amorphous $(Fe_{0.61}Co_{0.10}Zr_{0.025}Hf_{0.025}Ti_{0.02}W_{0.02}B_{0.20})_{97}Y_{3}$ alloy when subjected to strong magnetic fields: the specific focus of the paper is the area known as the approach to ferromagnetic saturation. The investigated alloy samples were produced using the suction-casting method, resulting in plates of dimensions 10 mm × 5 mm × 0.5 mm and rods of length 20 mm and diameter 1 mm. The structure was studied using X-ray diffractometry. It was found that investigated samples were amorphous in the as-cast state. The magnetization was measured in a strong magnetic field using a vibrating sample magnetometer. On the basis of the obtained results, the type of structural defects having influence on magnetization in high magnetic fields were determined for the bulk metallic glasses manufactured with different cooling rates.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 413-414
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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