Search results

1

An Investigation Into The Effect Of Isothermal Annealing On Magnetic Properties In The Alloy: Fe64Co10Y6B20

100%

Nabiałek M.

Archives of Metallurgy and Materials

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2015

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issue 3

2

Influence of the Quenching Rate on the Structure and Magnetic Properties of the Fe-Based Amorphous Alloy

100%

Nabiałek M.

Archives of Metallurgy and Materials

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2016

|

issue 1

3

Reduced Glass-Transition Temperature versus Glass-Forming Ability in FeCoB-Based Amorphous Alloys

100%

Nabiałek M.

Archives of Metallurgy and Materials

|

2016

|

issue 4

4

Influences of Production Method and Minor Chemical Composition Changes on the Microstructure of the Alloy: Fe_{62-x}Co₁₀Y₈MoₓB₂₀ (where x=1 or 2)

64%

Nabiałek M., Garus S.

Acta Physica Polonica A

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2016

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vol. 130

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issue 4

1010-1012

EN

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.

5

The Influence of Heat Treatment on Irreversible Structural Relaxation in Bulk Amorphous Fe₆₁Co₁₀Ti₃Y₆B₂₀ Alloy

64%

Błoch K., Nabiałek M.

Acta Physica Polonica A

|

2015

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vol. 127

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issue 2

442-444

EN

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.

6

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}

64%

Błoch K., Nabiałek M.

Acta Physica Polonica A

|

2015

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vol. 127

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issue 2

413-414

EN

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.

7

Analysis of the Thermal and Magnetic Properties of Amorphous Ribbons of Fe₆₁Co₁₀B₂₀Y₈Me₁ (where Me = W, Zr, Nb, Mo)

64%

Pietrusiewicz P., Nabiałek M.

Acta Physica Polonica A

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2017

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vol. 131

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issue 4

678-680

EN

This paper presents the results pertaining to thermal and magnetic studies of rapidly-cooled samples of the alloy family Fe₆₁Co₁₀B₂₀Y₈Me₁ (where Me = Nb, Zr, W, Mo). The resulting ribbons, or tapes, have amorphous structure. It has been found that the addition of Me elements alters the thermal and magnetic properties. It is noted that the saturation magnetization decreases with increasing number of unpaired electrons on the valence shells. In addition, the value of the coercivity and effective anisotropy have been determined.

8

Microstructure and Magnetic Properties of the Classical Amorphous Alloys: Fe₆₁Co₁₀Y₈Me₁B₂₀ (where Me = W, Mo)

64%

Pietrusiewicz P., Nabiałek M.

Acta Physica Polonica A

|

2016

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vol. 130

|

issue 4

920-922

EN

A study has been conducted into the effects of substituting small quantities of alloying elements (tungsten and molybdenum) on the structure and magnetic properties of classical amorphous alloys that are based on the formula: Fe₆₁Co₁₀Y₈Me₁B₂₀. The structure of the resulting alloy samples was examined using X-ray diffraction, Mössbauer spectroscopy, and scanning electron microscopy. Based on the results of these studies, it was found that the obtained alloys were amorphous. Images from the scanning electron microscope were typical for amorphous materials. Cross-sectional images were homogeneous and did not contain "vein- and scale-type" precipitations. Studies examining the magnetic properties of the samples were carried out using a vibrating sample magnetometer. It was found that the alloy featuring the addition of tungsten exhibited a significantly greater saturation of magnetization and a substantially lower coercivity. This resulted from the fact that the atomic radius of tungsten is much larger than that of molybdenum, resulting in increased difference between the atomic constituents of the alloy; This, in turn, improves the glass-forming ability.

9

Modification Of The Structure And Properties Of The Titanium Alloy Ti6Al4V In Biomedical Applications

52%

Klimas J., Łukaszewicz A., Szota M., Nabiałek M.

Archives of Metallurgy and Materials

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2015

|

issue 3

10

Structural Defects In The FeCoYB Amorphous Alloys

52%

Błoch K., Nabiałek M., Gondro J., Szota M.

Archives of Metallurgy and Materials

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2015

|

issue 3

11

The Magnetization Reversal Processes Of Bulk (Nd, Y)-(Fe, Co)-B Alloy In The As-Quenched State

52%

Dośpiał M., Nabiałek M., Szota M., Gondro J.

Archives of Metallurgy and Materials

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2015

|

issue 3

12

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

52%

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.

13

Structure and Magnetic Properties of the Alloys Fe_{60}Co_{10}W_xMo_{2}Y_{8}B_{20-x} (x=0, 1, 2)

52%

Garus J., Garus S., Nabiałek M., Szota M.

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vol. 126

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issue 4

954-956

EN

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.

14

The Influence of Heat Treatment on Soft Magnetic Properties of the Fe_{60}Co_{10}Mo_{2}Y_{8}B_{20} Alloy

52%

Garus S., Nabiałek M., Garus J.

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vol. 126

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issue 4

960-962

EN

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).

15

Structural Investigations and Determination of Current and Voltage Characteristics in Htsc 2G SF12050 Tapes

52%

Jędryka J., Szota M., Nabiałek M.

Archives of Metallurgy and Materials

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2011

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issue 4

16

The Study of Magnetization in Strong Magnetic Fields for Alloys Fe_{60}Co_{10}W_xNb_2Y_{8}B_{20-x} (x=0, 1)

52%

Garus S., Nabiałek M., Błoch K., Garus J.

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vol. 126

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issue 4

957-959

EN

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.

17

The Influence of Heat Treatment on the Magnetization Process (within Strong Magnetic Fields) for the Alloy: Fe61Co10Y8Cu1B20

52%

Gruszka K., Nabiałek M., Błoch K.

Archives of Metallurgy and Materials

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2016

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issue 2

18

Ab Initio Study of Structure, Electronic and Magnetic Properties of YFe5 Phase Compound in the DFT Formalism

52%

Gruszka K., Nabiałek M., Noga T.

Archives of Metallurgy and Materials

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2016

|

issue 1

19

Influence of 1% Addition of Nb and W on the Relaxation Process in Classical Fe-Based Amorphous Alloys

52%

Pietrusiewicz P., Błoch K., Nabiałek M., Walters S.

Acta Physica Polonica A

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2015

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vol. 127

|

issue 2

397-399

EN

This paper features investigations into the influence of small additions of alloying elements on: structure, as well as the temporal and thermal stability of magnetic properties, and the disaccommodation effect, for the following amorphous alloys: Fe₆₁Co₁₀Y₈Me₁B₂₀ (where Me = Nb, W). The structure of the investigated samples has been confirmed by the Mössbauer spectroscopy. The obtained results indicate a strong correlation between the structure and the disaccommodation of the studied alloys. The Mössbauer studies reveal different configurations of atoms in the amorphous alloy samples, and the results indicate various potential barriers between orientations of atom pairs. For this reason, to describe the disaccommodation effect, the distribution of activation energy should be taken into account. The distribution of activation energy has been related to the distribution of relaxation times.

20

Microstructure and Soft Magnetic Properties of Fe-Zr-(Pt)-Nb-Cu-B Amorphous Alloys

52%

Gondro J., Błoch K., Nabiałek M., Walters S.

Archives of Metallurgy and Materials

|

2017

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vol. 62

|

issue 2

Refine search results

An Investigation Into The Effect Of Isothermal Annealing On Magnetic Properties In The Alloy: Fe64Co10Y6B20

Influence of the Quenching Rate on the Structure and Magnetic Properties of the Fe-Based Amorphous Alloy

Reduced Glass-Transition Temperature versus Glass-Forming Ability in FeCoB-Based Amorphous Alloys

Influences of Production Method and Minor Chemical Composition Changes on the Microstructure of the Alloy: Fe_{62-x}Co₁₀Y₈MoₓB₂₀ (where x=1 or 2)

The Influence of Heat Treatment on Irreversible Structural Relaxation in Bulk Amorphous Fe₆₁Co₁₀Ti₃Y₆B₂₀ Alloy

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}

Analysis of the Thermal and Magnetic Properties of Amorphous Ribbons of Fe₆₁Co₁₀B₂₀Y₈Me₁ (where Me = W, Zr, Nb, Mo)

Microstructure and Magnetic Properties of the Classical Amorphous Alloys: Fe₆₁Co₁₀Y₈Me₁B₂₀ (where Me = W, Mo)

Modification Of The Structure And Properties Of The Titanium Alloy Ti6Al4V In Biomedical Applications

Structural Defects In The FeCoYB Amorphous Alloys

The Magnetization Reversal Processes Of Bulk (Nd, Y)-(Fe, Co)-B Alloy In The As-Quenched State

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

Structure and Magnetic Properties of the Alloys Fe_{60}Co_{10}W_xMo_{2}Y_{8}B_{20-x} (x=0, 1, 2)

The Influence of Heat Treatment on Soft Magnetic Properties of the Fe_{60}Co_{10}Mo_{2}Y_{8}B_{20} Alloy

Structural Investigations and Determination of Current and Voltage Characteristics in Htsc 2G SF12050 Tapes

The Study of Magnetization in Strong Magnetic Fields for Alloys Fe_{60}Co_{10}W_xNb_2Y_{8}B_{20-x} (x=0, 1)

The Influence of Heat Treatment on the Magnetization Process (within Strong Magnetic Fields) for the Alloy: Fe61Co10Y8Cu1B20

Ab Initio Study of Structure, Electronic and Magnetic Properties of YFe5 Phase Compound in the DFT Formalism

Influence of 1% Addition of Nb and W on the Relaxation Process in Classical Fe-Based Amorphous Alloys

Microstructure and Soft Magnetic Properties of Fe-Zr-(Pt)-Nb-Cu-B Amorphous Alloys