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1
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Structural Defects In The FeCoYB Amorphous Alloys

100%
Błoch K., Nabiałek M., Gondro J., Szota M.
Archives of Metallurgy and Materials
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2015
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issue 3
2
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The Magnetization Reversal Processes Of Bulk (Nd, Y)-(Fe, Co)-B Alloy In The As-Quenched State

100%
Dośpiał M., Nabiałek M., Szota M., Gondro J.
Archives of Metallurgy and Materials
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2015
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issue 3
3
Content available remote

Magnetocaloric Effect in Amorphous and Partially Crystallized Fe-Zr-Nb-Cu-B Alloy

100%
Gondro J., Błoch K., Nabiałek M., Wallters S.
Acta Physica Polonica A
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2015
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vol. 127
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issue 2
606-607
EN
This paper presents the results of an investigation into the: microstructure, magnetic properties and influence of annealing temperature on the magnetocaloric effect of Fe₈₂Zr₇Nb₂Cu₁B₈ alloy in the as-quenched and partially crystalline state. The microstructure was investigated using Mössbauer spectroscopy. The magnetocaloric effect was observed as a change in the magnetic entropy, which was calculated from isothermal magnetization curves. Fully-amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ alloys, in the as-quenched state, exhibit a Curie temperature equal to (340±5) K. The transmission Mössbauer spectrum for the as-quenched Fe₈₂Zr₇Nb₂Cu₁B₈ alloy is typical for weak ferromagnets with the average hyperfine field of 9.86(2) T. For this alloy in the as-quenched state, the changes in maximum magnetic entropy occur near the Curie points and are equal to 0.95 J/(kg K). Also, the maximum magnetic entropy changes decrease after partial crystallization.
4
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Microstructure and Soft Magnetic Properties of Fe-Zr-(Pt)-Nb-Cu-B Amorphous Alloys

100%
Gondro J., Błoch K., Nabiałek M., Walters S.
Archives of Metallurgy and Materials
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2017
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vol. 62
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issue 2
5
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Structure and Magnetic Properties of Amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ and Crystalline Fe₈₂Zr₆Y₁Nb₂Cu₁B₈ Alloys

100%
Gondro J., Błoch K., Nabiałek M.
Acta Physica Polonica A
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2016
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vol. 130
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issue 4
909-912
EN
In order to obtain an alloy with a specific set of magnetic properties, the dominant influences of chemical component and thermal treatment selection need to be satisfied. In this paper, the results of investigations into the microstructure and magnetic properties of the following alloys are presented: amorphous Fe₈₂Zr₇Nb₂Cu₁B₈ and crystalline Fe₈₂Zr₆Y₁Nb₂Cu₁B₈. The structure and microstructure were examined using the Mössbauer spectroscopy and X-ray diffractometry. The Fe₈₂Zr₇Nb₂Cu₁B₈alloy was found to be fully amorphous in the as-quenched state and the transmission Mössbauer spectrum for this alloy is typical of that for weak ferromagnets, with an average hyperfine field of 9.86(2) T. The shape of this spectrum was found to have changed noticeably in the case of the Fe₈₂Zr₆Y₁Nb₂Cu₁B₈ alloy. This change was attributed to the presence of the crystalline phase bcc-Fe.
6
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Microstructure And Magnetic Properties Of The FeZr(Y)NbCuB Amorphous Alloys

88%
Gondro J., Błoch K., Nabiałek M., Waltters K., Szota M.
Archives of Metallurgy and Materials
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2015
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issue 2
7
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Curie Temperature and Microstructural Changes Due to the Heating Treatment of Magnetic Amorphous Materials

88%
Gondro J., Błoch K., Brągiel P., Nabiałek M., Szota M.
Archives of Metallurgy and Materials
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2016
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issue 1
8
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Time and Thermal Stability of Magnetic Properties in Fe_{61}Co_{10}Y_{8}Nb_{1}B_{20} Bulk Amorphous Alloys

76%
Błoch K., Nabiałek M., Pietrusiewicz P., Gondro J., Dośpiał M., Szota M., Gruszka K.
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vol. 126
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issue 1
108-109
EN
The paper presents studies of time and thermal stability of magnetic properties in Fe_{61}Co_{10}Y_{8}Nb_{1}B_{20} bulk amorphous alloys. The investigated sample was prepared by suction-casting method in the form of plate. The structure was studied using X-ray diffractometry. It was found that alloy was amorphous in the as-cast state. The magnetic properties were determined using completely automated set up for measurement of susceptibility and its disaccommodation. The disaccommodation curve was decomposed into three elementary processes, each of them was described by Gaussian distribution of relaxation times. From fit of theoretical curve the peak temperature, intensity at peak temperature, average activation energies, distribution parameter and pre-exponential factor of the Arrhenius law were determined. The obtained results indicate that the disaccommodation phenomenon in studied samples is related with directional ordering of atom pairs near the free volumes.
9
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Influence of Annealing on the Microstructure and Magnetic Properties in Amorphous Alloys

76%
Dośpiał M., Pietrusiewicz P., Nabiałek M., Szota M., Błoch K., Gondro J., Gruszka K.
Archives of Metallurgy and Materials
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2014
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issue 2
10
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Magnetic Relaxations in Amorphous Fe_{61}Co_{10}Y_{8}Zr_{1}B_{20} Alloy

76%
Pietrusiewicz P., Błoch K., Gondro J., Nabiałek M., Dośpiał M., Szota M.
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vol. 126
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issue 1
106-107
EN
Effects of annealing on the disaccommodation phenomenon in bulk metallic glasses (BMGs), obtained by injection-casting method have been studied. The amorphous structure has been confirmed using X-ray diffractometer. The annealing process has been performed at temperature below the crystallization temperature. For all investigated samples the disaccommodation curves have been determined. The susceptibility and its disaccommodation have been used in order to define thermal and time stability of magnetic properties. Obtained results have also been used to determine activation energies of elementary processes.
11
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Influence of the Production Method on Magnetization Processes of the Fe_{61}Co_{10}Y_{8}Mo_{1}B_{20} Bulk Amorphous Alloys

64%
Nabiałek M., Dobrzańska-Danikiewicz A., Pietrusiewicz P., Stradomski Z., Dośpiał M., Szota M., Gondro J., Lesz S.
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vol. 126
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issue 1
112-113
EN
The aim of this paper was to show the influence of the manufacturing method of bulk amorphous alloys on the resulting magnetization processes. Samples in the form of plates were prepared by the injection or suction of liquid alloy into a copper mould. In order to determine the type and quantity of structural defects present in the bulk amorphous alloys, the indirect method, i.e. the approach to the ferromagnetic saturation, was applied. Studies revealed the presence of conglomerates of point defects, for both alloys. These defects were pinning sites of domain walls and their number, size and type was found to have a direct impact on the coercive field. Alloy produced by the suction-casting method was found to possess the highest number of these defects, and thus a higher coercive field value.
12
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Analysis of the Thermal and Magnetic Properties of Amorphous Fe61Co10Zr2.5Hf2.5Me2W2B20 (Where Me = Mo, Nb, Ni Or Y) Ribbons

52%
Dośpiał M., Gruszka K., Mizera J., Nabiałek M., Szota M., Bloch K., Gondro J., Pietrusiewicz P., Sandu A. V., Mustafa Al Bakri A. M., Walters S., Walters K., Garus S.
Archives of Metallurgy and Materials
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2016
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issue 2
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