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    Wyświetlanie 1-10 z 10
    Tytuł:
    Rayleigh Region in Amorphous and Nanocrystaline FINEMET Alloy
    Autorzy:
    Novák, L.
    Kováč, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1200807.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.50.Tt
    75.60.Ch
    75.60.Ej
    75.60.Jk
    Opis:
    The magnetization processes in region of small excitation magnetic fields - Rayleigh region, were investigated on the amorphous and nanocrystalline FINEMET ribbons. The significant differences in behaviour of these materials were found. This could be explained by the difference in the value of magnetoelastic anisotropy as well as by the different thickness of the domain walls in these materials.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 126-127
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Magnetic Properties and the Barkhausen Noise of the Hydrogenated Fe-V-B Amorphous Alloy
    Autorzy:
    Ceniga, L.
    Novák, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013242.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Dq
    75.50.Kj
    75.60.Ej
    Opis:
    As a consequence of the hydrogenation-dehydrogenation process, in the present paper the study of structural changes which could be followed by measuring structure sensitive magnetic properties as the stress induced anisotropy, the coercive force, the demagnetizing factor, and the Barkhausen noise parameters of the as-cast and hydrogenated Fe$\text{}_{80}$V$\text{}_{5}$B$\text{}_{15}$ amorphous alloys is performed.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 611-614
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pulse Heat Treatment of FINEMET Alloys Under Tension
    Autorzy:
    Lovas, A.
    Hubač, L.
    Novák, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1200788.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.60.Ej
    81.07.Bc
    Opis:
    In this contribution a less common experimental procedure is presented, which includes simultaneous application of electrical pulse heating, and longitudinal mechanical stress, applied along the ribbon length, for the magnetic property tailoring. The annealing is performed in protecting atmosphere in a vertical tube furnace by applying a weight at the free, cold bottom end of the ribbon. In these circumstances neither nanometer-size grains nor the concentration-distribution have been developed. The static coercive force, anisotropy and demagnetizing factor are monitored as a function of pulse number.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 100-101
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Magnetic Properties and the Barkhausen Noise of the Annealed Fe-V-B Amorphous Alloy
    Autorzy:
    Ceniga, L.
    Novák, L.
    Zentko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013228.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Dq
    75.50.Kj
    75.60.Ej
    Opis:
    As a consequence of the annealing process, the study of structural changes which can be followed by measuring structure sensitive magnetic properties as the stress induced anisotropy, the coercive force, the demagnetizing factor, and the Barkhausen noise parameters of the as-cast and annealed Fe$\text{}_{80}$V$\text{}_{5}$B$\text{}_{15}$ amorphous alloys was performed. The structural changes were connected with the temperature range where the Fe$\text{}_{80}$V$\text{}_{5}$B$\text{}_{15}$ amorphous alloy was characterized by the soft magnetic properties.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 575-578
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Pulse Heating on Rayleigh Area of Amorphous FINEMET-Type Alloy
    Autorzy:
    Novák, L.
    Kováč, J.
    Hubač, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032143.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    75.50.Kj
    75.60.Nt
    75.60.Jk
    Opis:
    The effect of pulse annealing on magnetization processes in FINEMET-type alloy in weak magnetic fields (the Rayleigh area) is studied in this paper. Rapidly quenched FINEMET ribbon in the original amorphous state was chosen for the study. The significant differences in behavior of studied materials are ascribed to the differences in internal mechanical stresses, which bring about the changes in total magnetic anisotropy and consequently also changes in domain walls thickness.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 753-755
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the Magnetization Processes in Amorphous and Nanocrystalline FINEMET by the Numerical Decomposition of the Hysteresis Loops
    Autorzy:
    Kováč, J.
    Novák, L.
    Varga, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032185.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.-d
    75.60.Ej
    Opis:
    The magnetization processes in amorphous and nanocrystalline FINEMET ribbons were studied by the numerical decomposition of the quasi-static hysteresis loop to the contributions of the domain wall movement, the domain rotations, and the domain wall annihilation and nucleation processes following the hyperbolic T(x) model of hysteresis. The hysteresis data measured during decrease of the excitation magnetic field were used for the separation of these processes. The significant differences in behavior of these two materials were found. In amorphous state the domain rotations component dominates whereas in nanocrystalline state the domain wall movement component prevails. These differences are reflected in the anisotropy field distributions as well.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 732-734
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of Magnetic and Mechanical Properties in FINEMET-Type Precursor Glasses during Isothermal and Pulse Heat Treatments
    Autorzy:
    Hubač, L.
    Novák, L.
    Balla, S.
    Lovas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030278.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.30.Gw
    75.70.-i
    Opis:
    The effects on the evolution of coercivity (H_c) and brittleness in FINEMET-type precursor glasses during traditional (isothermal) and pulse heat treatments are compared. The time and temperature dependences of these quantities are monitored during the series of isothermal and pulse heat treatments. The activation energy for H_c relaxation is lower than that for the brittleness evolution, however, dramatic changes in the values of these quantities can be detected above 300°C. Both quantities change mainly with temperature, they are less time-dependent.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 672-674
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Mechanism of H-Induced Curie-Point Relaxation in Fe-Based Glassy Alloys
    Autorzy:
    Balla, S.
    Kováč, J.
    Novák, L.
    Lovas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813523.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.23.Cq
    71.55.Jv
    75.50.Kj
    81.40.Rs
    Opis:
    In Fe based glasses not solely the stress-sensitive magnetic properties, but also the amorphous Curie temperature $(T_C^{am})$ can be altered by hydrogen absorption or due to the low temperature "heat treatments" in liquid $N_2$ (-196°C). The sign and magnitude of this $T_C^{am}$ shift is strongly compositional dependent, but it is also influenced by the thermal history of glasses (heat treatments). In this paper new experimental results are presented, which were obtained on FeCrB alloys, supporting the previous observations. An attempt of interpretation of the results is also made, which is based on the existence of the quenched-in phase reminiscences, being inherited from the liquid structure.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 55-59
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simplified computation methodology for contact forces on tapered rolling bearing with flexible parts
    Autorzy:
    Sapietová, A.
    Novák, P.
    Šulka, P.
    Sapieta, M.
    Jakubovičová, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/196269.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    contact force
    cone bearing
    ANSYS
    FE analysis
    siła styczna
    łożysko stożkowe
    Opis:
    Durability calculations of bearings take in account the distribution of forces on rollers. Calculation of these forces in flexibly supported rings is the aim of the paper. We use simplified finite element (FE) models of bearings, which are integrated into the external geometry. This approach can consider the stiffness of the surrounding structure as well as the clearance of the bearing rings, the misalignment of bearings, shaft deflections, and the forces of crowning rollers. The presented results show an influence of the initial radial interference of the outer ring with housing on the distribution of forces in bearing rollers. As the radial stiffness of the housing is close to the stiffness of the outer ring interference, this causes considerable deformation of the housing. The presented approach is also able to calculate the distribution of contact pressures over any rolling element.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2018, 99; 177-182
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Properties of Fe-Ni-Al-Si Alloys Produced by Powder Metallurgy
    Autorzy:
    Novák, P.
    Mejzlíková, L.
    Hošek, V.
    Martínek, M.
    Marek, I.
    Michalcová, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418514.pdf
    Data publikacji:
    2012-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    62.20.Qp
    Opis:
    Reactive sintering powder metallurgy is a simple alternative to conventional melting and powder metallurgy processes. During this process, pressed powder mixture of pure metals or other precursors is transformed into bulk intermediary phases by thermally activated in situ reaction. This process was previously tested on Fe-Al and Fe-Al-Si alloys. Positive effect of silicon on the reactive sintering behaviour was determined, leading to the development of novel carbon-free high-silicon FeAl20Si20 alloy (given in wt%). In this work, the effect of nickel on the pressureless reactive sintering of Fe-Al-Si pressed powder mixtures was studied. To explain the nickel influence, differential thermal analysis was utilized. Microstructure, phase composition and porosity of the FeAl20Si20Nix (x = 0, 5, 10, 20 wt%) alloys was described. Hardness, wear resistance, high-temperature oxidation resistance and thermal stability were evaluated as functions of nickel content. Results showed that porosity decreases with growing nickel content down to less than 3 vol.%. Oxidation rate of these alloys is more than 10 times lower than that of original FeAl20Si20 alloy. Thermal stability and abrasive wear resistance of these alloys is also superior to Fe-Al and Fe-Al-Si materials.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 3; 524-527
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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