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Wyświetlanie 1-6 z 6
Tytuł:
Structure and magnetic properties of Fe-B-Si-Zr metallic glasses
Autorzy:
Babilas, R.
Radoń, A.
Gębara, P.
Powiązania:
https://bibliotekanauki.pl/articles/1054824.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.45.+x
61.05.cp
64.70.pe
75.50.Kj
Opis:
Fe-based amorphous alloys were characterized by X-ray diffraction, transmission Mössbauer spectroscopy and vibrating sample magnetometry. The studies were performed on (Fe_{0.75}B_{0.15}Si_{0.1})_{100-x}Zr_{x} (x=0, 1, 3) metallic glasses in the form of ribbons. The glassy samples were prepared by the "melt spinning" technique in argon protective atmosphere. The XRD patterns show the broad diffraction halo that is typical for amorphous Fe-based alloys. The Mössbauer spectroscopy allows to study the local environments of the Fe atoms in the glassy state, showing the changes in the amorphous structure due to the changing of Zr addition. From hysteresis loops obtained from vibrating sample magnetometry measurements, coercive force and saturation magnetization were determined versus different Zr content. The obtained magnetic properties allow to classify the studied amorphous alloys in as-cast state as soft magnetic materials.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 726-728
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Nb Atoms on the Crystallization Process of Fe-B-Nb Amorphous Alloys
Autorzy:
Babilas, R.
Kądziołka-Gaweł, M.
Powiązania:
https://bibliotekanauki.pl/articles/1387207.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
64.70.pe
75.50.Bb
75.50.Kj
Opis:
The ferromagnetic Fe-based amorphous alloys have been studied due to the attractive properties for soft magnetic applications. Depending on different Nb concentration, we studied the formation of crystalline phases in annealed samples of amorphous metallic alloys for $Fe_{80-x}B₂₀Nbₓ$ (x=0, 4, 10). The nature of the crystallization products as well as the phase structure were determined by using the Mössbauer spectrometry combined with X-ray diffraction and differential scanning calorimetry results. Substitution of Fe atoms by Nb lead to significant changes in hyperfine magnetic field $(B_{hf})$ distributions in as-quenched amorphous alloys $Fe_{80-x}B₂₀Nbₓ$, for x=10 the minimal value of $B_{hf}$ is observed. Addition of this element causes shift of crystallization process towards higher temperatures and induces formation of phase complex including the α -Fe, Fe₂B and Fe₃B. Combination of X-ray diffraction and Mössbauer spectroscopy is very useful method in studying the structural environment of Fe atoms on a nearest-neighbor length scale.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 573-575
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Study and Crystallization Behaviour of $Fe_{62-x} Co_x Nb_8 B_{30}$ Metallic Glasses (x=0, 20)
Autorzy:
Babilas, R.
Kądziołka-Gaweł, M.
Powiązania:
https://bibliotekanauki.pl/articles/1398363.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
64.70.pe
75.50.Bb
75.50.Kj
Opis:
The paper presents the structural analysis of $Fe_{62-x} Co_x Nb_8 B_{3-}$ metallic glasses (x=0, 20) in as-cast and after crystallization state. The studies were performed on metallic glasses of ribbon form: with thickness of 0.05 and 0.06 mm. The structure analysis of the samples in as-cast state and phase analysis of studied alloys after annealing was carried out by the X-ray diffraction methods. Moreover, the Mössbauer spectroscopy was also used to investigate the local structure for examined alloys. The soft magnetic properties examination covered the initial magnetic permeability. The after-effects of magnetic permeability were also conducted.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 901-904
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer Study on Local Atomic Structure in $Fe_{80-x}Nb_xB_{20}$ (x=4, 6) Metallic Glasses
Autorzy:
Babilas, R.
Kądziołka-Gaweł, M.
Powiązania:
https://bibliotekanauki.pl/articles/1398812.pdf
Data publikacji:
2016-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
64.70.pe
75.50.Bb
75.50.Kj
Opis:
Fe-based amorphous alloys were prepared by the melt-spinning technique and characterized by X-ray diffraction and transmission Mössbauer spectroscopy. The studies were performed on Fe₇₆Nb₄B₂₀ and Fe₇₄Nb₆B₂₀ metallic glasses in the form of ribbons. The Mössbauer spectroscopy allows to study the local environments of the Fe atoms in the glassy state, showing the changes in the amorphous structure due to the changing of Nb addition. The obtained Mössbauer spectra of ferromagnetic metallic glasses present broad lines resulting from the distribution of non-equivalent iron sites and of interatomic distances. Variation of Nb content in the alloys affects the disorder in as-cast state and also influences on the average radius of the first coordination shell and the number of nearest neighbor Fe atoms.
Źródło:
Acta Physica Polonica A; 2016, 129, 2; 190-192
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties and Structure after Crystallization of $Fe_{80-x}B_{20}Nb_{x}$ (x=4, 6, 10) Metallic Glasses
Autorzy:
Nowosielski, R.
Kądziołka-Gaweł, M.
Gębara, P.
Szyba, D.
Babilas, R.
Powiązania:
https://bibliotekanauki.pl/articles/1398320.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.45.+x
61.05.cp
64.70.pe
75.50.Kj
Opis:
The ferromagnetic Fe-based amorphous alloys were studied due to properties for soft magnetic applications. Depending on different Nb addition, the formation of crystalline phases after annealing of amorphous $Fe_{80-x}B_{20}Nb_{x}$ (x = 4,6,10) alloys was studied. The crystallization products as well as the phase structure were determined using the Mössbauer spectrometry combined with differential scanning calorimetry and magnetic measurements. The addition of Nb caused a shift of crystallization process towards higher temperatures and induced changes in coercive force and decreased the saturation magnetization. It was found that Nb addition changed the crystallization process from single crystallization for Fe₇₆B₂₀Nb₄ alloy to binary crystallization in the Fe₇₄B₂₀Nb₆ and Fe₇₀B₂₀Nb₁₀ glasses. The annealing process at the onset crystallization temperature induced complex phase formation including the α-Fe, Fe₃B, and Fe₂B phases for alloys x=4, 6.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1212-1216
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrochemical Characterization of Ca₆₅Mg₁₅Zn₂₀ Amorphous Alloy in Selected Physiological Fluids
Autorzy:
Babilas, R.
Szyba, D.
Kania, A.
Pilarczyk, W.
Nowosielski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1029772.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
64.70.pe
68.35.bd
82.45.Bb
82.80.Fk
Opis:
The corrosion behavior of the bulk glassy samples of Ca₆₅Mg₁₅Zn₂₀ alloy was studied by electrochemical measurements and immersion tests in a simulated body fluid, physiological fluid, and the Ringer solution. The results of immersion show that the volume of H₂ evolved after 2 h in simulated body fluid (29.8 ml/cm²) is the highest in comparison with the results of measurements conducted in physiological fluid (11.3 ml/cm²) and the Ringer solution (7.4 ml/cm²). The electrochemical measurements indicated a shift of the corrosion potential (E_{corr}) from -1.58 V for plate tested in a physiological fluid to -1.56 V and -1.54 V for samples immersed in the Ringer solution and simulated body fluid, adequately. The X-ray diffraction measurements were used to determine composition of corrosion products. The corrosion products were mainly identified to be calcium carbonates and calcium/magnesium hydroxides.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 228-231
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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