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    Wyświetlanie 1-4 z 4
    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:
    Structure and Magnetic Properties of Amorphous $Fe_{60}Co_{10}Mo_{2}W_{x}Y_8 B_{20-x}$ (x=0, 1) Alloys
    Autorzy:
    Błoch, K.
    Nabiałek, M.
    Garus, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398365.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Np
    75.50.Bb
    75.50.Kj
    75.90.+w
    Opis:
    This paper presents studies of the bulk amorphous alloys: $Fe_{60} Co_{10} Mo_2 Y_{8} B_{20}$ and $Fe_{60} Co_{10} Mo_2 W_1 Y_8 B_{19}$; Both compounds were obtained by means of the injection-casting method in which liquid alloy is forced under pressure into a copper mould. The structure of the samples was studied using X-ray diffraction and scanning electron microscopy. Based on the results of the X-ray diffraction studies, it was found that the samples were in the amorphous state. Scanning electron microscopy image analysis of fractured alloy samples indicated the presence of areas of varying degrees of relaxation: "smooth", "vein", and "flake" fractures. The manufactured ferromagnetic samples were characterized by so-called soft magnetic properties with a relatively high Curie temperature of more than 520 K. In the investigated samples, the saturation magnetization was found to have been decreased from 1.14 T to 1.13 T after the addition of W. Tungsten also contributed significantly to an increase in the value of the coercive field, from 27 A/m to 8685 A/m. Following the addition of just 1% of W to the alloy, a substantial change was observed in the form: of the static magnetic hysteresis loop: characterized by the so-called "wasp" shape. This result shows that an additional magnetically hard phase had appeared within the sample.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 905-908
    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:
    Analysis of the Thermal and Magnetic Properties of Amorphous Fe61Co10Zr2.5Hf2.5Me2W2B20 (Where Me = Mo, Nb, Ni Or Y) Ribbons
    Autorzy:
    Gruszka, K.
    Nabiałek, M.
    Szota, M.
    Bloch, K.
    Gondro, J.
    Pietrusiewicz, P.
    Sandu, A. V.
    Mustafa Al Bakri, A. M.
    Walters, K.
    Walters, S.
    Garus, S.
    Dośpiał, M.
    Mizera, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/355886.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermal stability
    magnetic properties
    Opis:
    The paper presents the results of structural and magnetic properties and thermal stability for a group of functional materials based on Fe61Co10Zr2.5Hf2.5Me2W2B20 (where Me = Mo, Nb, Ni or Y). Samples were obtained in the form of ribbons using melt-spinning method. The X-ray diffraction patterns of investigated samples confirmed their amorphous structure. Based on the analysis of DSC curves characteristic temperatures: glass forming temperature (Tg), crystallization temperature (Tx) and temperature range of the supercooled liquid ΔTx were determined. Small addition of transition metals elements has strong influence on magnetic and thermal parameters of studied materials. The comprehensive studies revealed that in terms of magnetic properties the Ni-addition resulted in highest reduction in coercivity and anisotropy field.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 641-644
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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