Wszystkie pola: Idzikowski, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development of magnetic properties during annealing of Hf₂Co₁₁B amorphous alloy
Autorzy:: Musiał, A.
Śniadecki, Z.
Idzikowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/1050942.pdf
Data publikacji:: 2017-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Ww
75.60.Nt
75.50.Kj
Opis:: Influence of heat treatment on magnetic properties of amorphous Hf₂Co₁₁B alloy was investigated. Hard magnetic phase, characterized by high magnetic anisotropy, appears during crystallization. The highest coercive field equal to 1.86 kOe, was obtained for sample annealed in third crystallization stage. Longer heat treatment at T_{a} = 650°C leads to decrease in coercive field, which can be the result of excess of the HfCo₃B₂ phase volume fraction and additionally eutectoid transformation of hard magnetic phase into soft magnetic Co₂₃B₆ and fcc-Co. Decrease of volume fraction of hard phase is confirmed by the remanence ratio m_{r}. Value of m_{r}, for T_{a} = 650°C, is decreasing with annealing time from 0.4 to 0.27 for 30 min and 120 min, respectively. The magnetocrystalline anisotropy constant K₁ increases from 2.23 Merg/cm³ for the amorphous ribbon to 15.84 Merg/cm³ for the sample annealed at 650°C for 30 min.
Źródło:: Acta Physica Polonica A; 2017, 131, 4; 786-788
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Semi-Empirical Modelling of Glass Forming Ranges for Y-Co-Si System
Autorzy:: Śniadecki, Z.
Narojczyk, J.
Idzikowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/1366620.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.70.-a
61.43.Dq
81.30.Bx
Opis:: Glass forming abilities of a ternary Y-Co-Si system were determined on the basis of combined semi-empirical Miedema's and geometric models. The enthalpy of amorphous and solid solution phases formation, along with the mismatch entropy and GFA parameter, were analysed to indicate compositions with the highest ability for the amorphization. The large atomic radii difference between constituents, especially Y and Si, is the deciding factor of GFA. Compositions ranged between $Y_{33}Si_{67}$ and $Y_{45}Si_{55}$ are the best glass formers.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 62-63
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Crystallization Processes of $R_{4.5}Fe_{77}B_{18.5}$ (R = Pr, Nd) Amorphous Alloys
Autorzy:: Musiał, A.
Śniadecki, Z.
Pagnani, D.
Idzikowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/1371300.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.43.Dq
65.60.+a
75.50.Bb
Opis:: The amorphous alloys $R_{4.5}Fe_{77}B_{18.5}$ (R=Pr, Nd) were prepared by melt-spinning technique under argon atmosphere on a cooper wheel rotating with surface velocity of 25 m·$s^{-1}$. The ribbons have been investigated by means of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Temperatures of crystallization for $Pr_{4.5}Fe_{77}B_{18.5}$, measured at the heating rate 20 K/min, are equal $T_{x1}$=591°C for the first exothermic effect and $T_{x2}$=603°C for the second one (for $Nd_{4.5}Fe_{77}B_{18.5} T_{x1}$=594°C and $T_{x2}$=633°C). In the amorphous ribbons the crystallization of $Fe_{3}B$ phase in the first step, followed by the crystallization of $Pr_{2}Fe_{23}B_{3}$ and $Nd_{2}Fe_{23}B_{3}$, was observed. Both later phases appear in the process of recrystallization, immediately after $Fe_{3}B$ formation.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 316-317
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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