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Tytuł:
Nanoscale Fracture Morphologies of Soft Magnetic CoFeTaB Amorphous Alloy
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Huráková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1367300.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.25.Mn
Opis:
We analyzed the failure characteristics of the bulk metallic glass $Co_{43}Fe_{20}Ta_{5.5}B_{31.5}$ (at.%) deformed by compression and by bending of the ribbons. Under the load the amorphous structure can store high elastic energy. The surface morphology of nanoscale fracture is in accord with the micromechanisms of the failure of the amorphous structure. The fracture surface consists of a smooth mirror cleavage zone and a river pattern zone with nanosized dimples, arranged in lines respecting the periodic corrugation zones, oriented perpendicular to the crack propagation direction. The presence of the failure initiation centers in the ribbon influences the dynamics of crack propagation and also the surface morphology of the fracture.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 96-97
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Stability of Amorphous Alloy of Modified Finemet Type
Autorzy:
Huráková, M.
Csach, K.
Juríková, A.
Miškuf, J.
Rajňák, M.
Ďurišin, M.
Kvačkaj, T.
Powiązania:
https://bibliotekanauki.pl/articles/1387067.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
62.20.de
Opis:
The Finemet type amorphous alloys are well known as high frequency soft magnetic materials. They have good soft magnetic properties which are characterized by low coercive force and high permeability because of the lack of crystalline anisotropy. The structural stability of the amorphous ribbon of Finemet type modified by Mn, Al and Cr prepared by melt-spinning process was studied using differential scanning calorimetry and dynamical mechanical analysis. With increase of the crystalline portion in the sample, the Curie transition is shifted to the higher temperatures. The magnetic relaxation processes at frequencies above 10⁴ Hz were detected by mass magnetic susceptibility measurement.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 564-566
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Phase Transition of Co-Ni-Si-B Amorphous Alloy
Autorzy:
Jakubczyk, E.
Powiązania:
https://bibliotekanauki.pl/articles/2027394.pdf
Data publikacji:
2001-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.20.Lc
64.70.Pf
Opis:
Structural changes of Co$\text{}_{66}$Ni$\text{}_{12}$ Si$\text{}_{9}$B$\text{}_{13}$ amorphous alloy, stimulated by isochronal and isothermal annealing, were observed by means of the methods: electrical resistivity, Hall effect and X-ray diffraction. In the amorphous matrix at the temperature 673 K phasesα-Co and (Co,Ni)$\text{}_{5}$Si$\text{}_{2}$B are created, while at the temperature 773 K the phase (Co,Ni)$\text{}_{3}$B is formed. The structural phase transitions are related to abrupt decrease in electrical and Hall resistivities at the background of systematic decrease in these parameters values during the alloy transition from the amorphous to the crystalline state.
Źródło:
Acta Physica Polonica A; 2001, 99, 6; 673-681
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fragmentation of Co-Fe-Ta-B Soft Magnetic Amorphous Alloy
Autorzy:
Miškuf, J.
Csach, K.
Juríková, A.
Huráková, M.
Tabachnikova, E.
Powiązania:
https://bibliotekanauki.pl/articles/1387048.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.25.Mn
Opis:
The main limitation of high-strength Co-based bulk metallic glasses for their application as structural materials is the large brittleness. Spontaneously emerging cracks in the alloy degrade the magnetic properties. We analyzed the failure characteristics of $Co_{43}Fe_{20}Ta_{5.5}B_{31.5}$ bulk soft magnetic metallic glass deformed in the compression at room temperature and the low strain rate. Under loading the amorphous structure stores high elastic energy. During the failure this energy is released and the alloy breaks into small particles or powder exhibiting a fragmentation mode.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 558-560
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Thermomagnetic Treatment on Magnetoelastic Properties of FeNiMoB Amorphous Alloy
Autorzy:
Szewczyk, R.
Svec, P.
Salach, J.
Švec, P.
Bieńkowski, A.
Hoško, J.
Jackiewicz, D.
Kamiński, M.
Winiarski, W.
Powiązania:
https://bibliotekanauki.pl/articles/1366528.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.80.+q
75.50.Kj
Opis:
Paper presents the results of magnetoelastic tests of ring-shaped cores made of $Fe_{40}Ni_{38}Mo_{4}B_{18}$ amorphous alloy. The cores were subjected to thermomagnetic annealing under different values of magnetic field. The obtained results enabled us to connect the magnetoelastic characteristics of $Fe_{40}Ni_{38}Mo_{4}B_{18}$ amorphous alloy with the conditions of thermomagnetic treatment of the material.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 52-53
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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
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
Tytuł:
Microstructure and Micromechanical Behaviors of Bulk Amorphous Alloy Prepared by Spark Plasma Sintering
Autorzy:
Ge, Yaqiong
Chang, Zexin
Wang, Wenxian
Hou, Qingling
Powiązania:
https://bibliotekanauki.pl/articles/2203707.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bulk amorphous alloy
spark plasma sintering
microstructure
micromechanical behaviors
Opis:
This study aimed to prepare Zr55Cu30Al10Ni5 bulk amorphous alloys by spark plasma sintering of raw amorphous alloy powders and investigate their microstructure and micromechanical behaviors. When the sintering temperature (Ts) was 675K, which was lower than the glass transition temperature (Tg) of the material, the sintered sample was almost fully amorphous but the density was lower. However, when Ts was 705K, which was higher than Tg, partial crystallization occurred, but the density was higher. The hardness of the bonding zone of the sintered sample at 675K was 5.291 GPa due to the lower density, which was lower than that at 705K, and the hardness at 705K was 8.836 GPa. The generation of thermodynamically stable intermetallic phases, the hardness, and the elastic modulus of the samples sintered above Tg were higher due to the higher density.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 31--36
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer temperature study of the Fe80Nb6B14 amorphous alloy
Autorzy:
Frąckowiak, J.
Tomczyk, A.
Hanc, A.
Haneczok, G.
Powiązania:
https://bibliotekanauki.pl/articles/148205.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
amorphous alloys
magnetic properties
structural relaxation
Opis:
Temperature studies in the range 300 800 K of amorphous Fe80Nb6B14 alloy using Mössbauer spectroscopy are presented. It is shown that at a temperature close to 700 K iron clusters with non-collinear magnetic structure are formed. The observed magnetic permeability enhancement effect in the annealed at elevated temperatures alloy, which takes place in amorphous phase, is due to the strong ferromagnetic exchange between Fe clusters via the amorphous matrix and reduction of internal stresses.
Źródło:
Nukleonika; 2007, 52, supl. 1; 43-46
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystallization Process of $Fe_{75}Co_5Zr_{10}B_{10}$ Amorphous Alloy
Autorzy:
Sun, Y.
Zuo, B.
Wang, D.
Meng, X.
Liu, J.
Wang, L.
Hua, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1399278.pdf
Data publikacji:
2013-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
64.60.My
Opis:
$Fe_{75}Co_5Zr_{10}B_{10}$ amorphous alloy prepared by melt-spinning was annealed at various temperatures. The thermal property and microstructures were investigated by differential thermal analysis, X-ray diffraction, and transmission electron microscopy. The crystallization process of $Fe_{75}Co_5Zr_{10}B_{10}$ amorphous alloy is complex. The α-Fe phase precipitates from the amorphous matrix in the initial stage of crystallization. The α-Mn type (χ) phase precipitates at 570°C, but transforms to α-Fe phase and the Laves C14(λ) phase at higher temperature. In the final stage of crystallization, $Fe_3Zr$, $Fe_2Zr$, and unknown phases are observed and the λ-phase disappears. The α-Fe phase preferentially nucleates after annealing at 530C for 10 min and the χ-phase preferentially nucleates after annealing at 600C for 10 min. The nucleation barrier of χ-phase is larger than that of α-Fe phase. The local structure of χ-phase is more similar to amorphous phase.
Źródło:
Acta Physica Polonica A; 2013, 124, 4; 685-687
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Local Structure of $Fe_{84}B_{16}$ Amorphous Alloy by Electron Diffraction
Autorzy:
Hrabčáková, V.
Michalik, Š.
Borisenko, K.
Girman, V.
Nemcová, V.
Sovák, P.
Powiązania:
https://bibliotekanauki.pl/articles/1367454.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.J-
61.43.Dq
61.43.-j
61.43.Bn
Opis:
Local atomic structure in $Fe_{84}B_{16}$ metallic glass, prepared by melt-spinning technique in He atmosphere, was studied by electron diffraction (ED) reduced density function (RDF) analysis. RDF curves were also obtained from X-ray diffraction (XRD) patterns and compared with the data from ED. Atomic reduced density functions, G(r), calculated from ED and XRD patterns showed good agreement. Atomic structure model has been fitted to the experimental ED data using Reverse Monte Carlo (RMC) simulation.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 130-131
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and Magnetic Studies of the Fe-Co-Zr-Mo-W-B Amorphous Alloy
Autorzy:
Kotynia, K.
Pawlik, P.
Hasiak, M.
Pruba, M.
Pawlik, K.
Powiązania:
https://bibliotekanauki.pl/articles/1030235.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
75.50.Kj
75.30.Sg
75.30.Kz
75.40.-s
Opis:
The paper presents a characterization of the phase structure by X-ray diffraction and isothermal magnetic entropy changes for the amorphous Fe₅₈Co₁₀Zr₁₀Mo₅W₂B₁₅ alloy sample in the as-quenched state. An ingot sample was obtained by arc-melting. The ribbon sample was obtained by the melt-spinning technique. The magnetic measurements at various temperatures allowed for the study of the Curie temperature T_{C} and magnetic entropy changes |ΔS_{M}|. In order to determine the Curie temperature T_{C} of amorphous phase, three independent methods were used. Determination of the Curie temperature T_{C} for the amorphous alloys is not a trivial problem, as magnetization does not decreases rapidly around T_{C}. Therefore it is essential issue to establish T_{C} using few complementary methods. X-ray diffraction analysis revealed a fully amorphous structure of the ribbon samples.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1204-1206
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:
Critical Behavior near the Ferromagnetic to Paramagnetic Phase Transition in Y₈Co₆₂B₃₀ Amorphous Alloy
Autorzy:
Śniadecki, Z.
Marcin, J.
Idzikowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1031033.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.40.Cx
75.50.Kj
75.30.Sg
Opis:
The Y₈Co₆₂B₃₀ amorphous alloy is a collinear ferromagnet. The Arrott plot, the Kouvel-Fisher method, critical isotherm analysis and magnetic field dependence of maximum magnetic entropy changes were the main analytical tools used to determine the nature of the ferromagnetic/paramagnetic phase transition. Values of critical exponents (β, γ, and δ) were calculated and were convergent with those characteristic for mean-field model. It suggests that long range ferromagnetic interactions are playing main role in investigated alloy and the phase transition was confirmed to be of a second order according to the Banerjee criterion.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 967-969
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex Permeability After-Effect and Analysis of Power Losses in Ferromagnetic Co-Based Amorphous Alloy
Autorzy:
Kravčák, J.
Varga, R.
Vojtaník, P.
Powiązania:
https://bibliotekanauki.pl/articles/1813518.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.40.Gb
75.60.Ch
75.60.Lr
Opis:
Complex permeability $(μ=μ_1-iμ_2)$ after-effect of near-zero magnetostrictive CoFeCrSiB amorphous alloy was investigated in magnetic field H (t)= $H_0$ exp ( i 2π f t) after demagnetization. For frequencies f from 200 Hz to 2000 Hz and for the small amplitude H_0 < $H_{cr}$ we observed practically constant both real $μ_1$ and imaginary part $μ_2$ of permeability. A measured small decrease in the real part $μ_1$ and increase in the imaginary part $μ_2$ with frequency f were theoretically calculated for a quadratic form of a domain wall potential $E_S$ (x)=1/2α $x^2$. The calculated loss factortan δ = $μ_2 μ_1$, which is small at amplitude $H_0$ < $H_{cr}$, corresponds to power losses due to eddy currents induced around reversibly moving domain walls.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 43-46
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of non-isothermal primary crystallization kinetics of Fe95Si5 amorphous alloy
Autorzy:
Frączyk, Adam
Kuś, Krzysztof
Wojtkowiak, Adam
Powiązania:
https://bibliotekanauki.pl/articles/950068.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
metallic glass
energy activation
Avrami exponent
crystallization kinetics parameter
DSC
Opis:
The paper describes the primary crystallization of metallic Fe95Si5 glass which was studied by differential scanning calorimetry (DSC) with non-isothermal methods. The activation energy of crystal transformation was calculated with the equations proposed by Kissinger, Mahadevan and a modified version of the equation developed by Augis and Bennett. Activation energy was determined at Ea = 242.0 - 254.2 kJ / mol, subject to the applied method. The Avrami exponent of crystallization in the amorphous phase n was determined in the range of n = 2.40 - 2.52, depending on the method of calculating the transformation of activation energy.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(3); 237-247
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
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:
Structural Relaxation in $Fe_{78}Nb_{2}B_{20}$ Amorphous Alloy Studied by Mössbauer Spectroscopy
Autorzy:
Kansy, J.
Hanc, A.
Rasek, J.
Haneczok, G.
Pająk, L.
Stokłosa, Z.
Kwapuliński, P.
Powiązania:
https://bibliotekanauki.pl/articles/1506588.pdf
Data publikacji:
2011-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.75.+a
76.80.+y
Opis:
It was shown that soft magnetic properties of $Fe_{78}Nb_{2}B_{20}$ amorphous alloy can be significantly improved by applying 1-h annealing at temperature 623 K (permeability increases even about 8 times). The Mössbauer Spectroscopy technique indicated that the optimized microstructure (corresponding to the maximum magnetic permeability) is free of iron nanograins and should be attributed to annealing out of free volume and a reduction of internal stresses i.e. to the relaxed amorphous phase.
Źródło:
Acta Physica Polonica A; 2011, 119, 1; 41-43
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perminvar Effect in Amorphous Hitperm Alloy
Autorzy:
Varga, M.
Varga, R.
Vojtanik, P.
Komova, E.
Powiązania:
https://bibliotekanauki.pl/articles/1813579.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Lr
Opis:
Influence of the directional ordering on magnetization processes in the amorphous $Fe_{44.5}Co_{44.5}Zr_7B_4$ alloy was investigated in the temperature region of 27 to 300°C for stabilization times of up to 1000 min by means of the Perminvar effect. The time-temperature dependent Perminvar effect was found to be very sensitive on the stage of the domain structure stabilization. The Perminvar critical fields $H_{CR}$ were shifted to higher values with increasing stabilization temperatures and times. At lower temperatures, the susceptibility increases over wide range of the measuring fields. Stabilization at higher temperatures causes that the susceptibility abruptly increases in the narrow field range. The record critical field $H_{CR} =246 Am^{-1}$ was obtained.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 119-122
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Quenching Rate on the Structure and Magnetic Properties of the Fe-Based Amorphous Alloy
Autorzy:
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/350944.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transmissions electron microscopy
scanning electron microscopy
amorphous matrials
free volumes
quasidislocation
Opis:
This paper presents the results of investigations into the structure, microstructure and magnetic properties of Fe61Co10Y8W1B20 amorphous alloy. The alloy samples were in two physical forms: (1) plates of approximate thickness 0.5 mm (so-called bulk amorphous alloys) and (2) a ribbon of approximate thickness 35 μm (so-called classic amorphous alloy). The investigations comprised: X-ray diffractometry, Mössbauer spectrometry, transmission electron microscopy, and selected magnetic measurements; all of the investigations were carried out on samples in the as-quenched state. Analysis of the obtained SEM and TEM images, X-ray diffraction patterns, Mössbauer spectrometry results and measurements of the magnetisation in a high magnetic field facilitated collectively the detailed description of the structure of the investigated alloy, which was found to depend on the quenching speed.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 439-444
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimisation of Frame-Shaped Fluxgate Sensor Core made of Amorphous Alloy Using Generalized Magnetostatic Method of Moments
Autorzy:
Szewczyk, R.
Frydrych, P.
Powiązania:
https://bibliotekanauki.pl/articles/1032692.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
85.75.Ss
75.50.Kj
Opis:
Fluxgate magnetic field sensors are commonly used in the industry, navigation as well as in non-destructive testing. Moreover, recent development of such sensors is focused on effective application of thin layer magnetic cores, such as made of amorphous alloys. However, effective development of fluxgate sensors require method of modeling its core taking into account demagnetization. The paper presents the results of optimization of the shape of thin-layer core for fluxgate sensor. Due to the fact that possibility of application of finite elements method is limited in the case of thin layer, the method of moments was used. Considering the geometry of the core as well as magnetizing and sensing winding, the optimal proportion of the length/thickness parameter was determined from the point of view of sensor sensitivity. It was proven that value of this optimal proportion is strongly dependent of thickness of the core.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 660-662
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The surface structural and mechanical properties of the amorphous CO22Y54AL24 ribbon
Autorzy:
Bukowska, A.
Pietrusiewicz, P.
Zdrodowska, K.
Szota, M.
Powiązania:
https://bibliotekanauki.pl/articles/102533.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
amorphous alloy
melt-spinning
ribbons
Opis:
The aim of this study was to manufacture amorphous Co22Y54Al24 alloy in a form of thin ribbons and to investigate their properties. The investigated ribbons were prepared by rapid solidification of molten metal on a rotating copper cylinder (melt-spinning). In order to obtain the material with amorphous structure, the cooling rate of the liquid alloy should vary in a range from 104 to 106 K/s. The microstructure studies were performed using X-ray diffractometery. The mechanical properties were investigated by metallographic studies, micro-hardness and tribological resistance tests moreover the surface roughness profile were analyzed. All studies were performed for two sides of tapes, since the differences in ribbons surface, related with manufacturing process, are clearly visible. The surface from the bottom (drum side) was glossy and from the top side it was shiny.
Źródło:
Advances in Science and Technology. Research Journal; 2013, 7, 19; 1-4
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cooling Rate on Mechanical Properties of New Multicomponent Fe-Based Amorphous Alloy During Annealing Process
Autorzy:
Rezaei-Shahreza, Parisa
Redaei, Hossein
Moosavi, Parisa
Hasani, Saeed
Seifoddini, Amir
Jeż, Bartłomiej
Nabiałek, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2048746.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bulk metallic glasses
BMGs
nanocomposite
mechanical testing
fracture toughness
Opis:
Fe-based bulk metallic glasses (BMGs) have been extensively investigated due to their ultrahigh strength and elastic moduli as well as desire magnetic properties. However, these BMGs have few applications in industrial productions because of their brittleness at room temperature. This study is focused on the effect of cooling rate on the mechanical properties (especially toughness) in the Fe41Co7Cr15Mo14Y2C15B6 BMG. For this aim, two samples with the mentioned composition were fabricated in a water-cooled copper mold with a diameter of 2 mm, and in a graphite mold with a diameter of 3 mm. The formation of crystalline phases of Fe23(B,C)6, α-Fe and Mo3Co3C based on XRD patterns was observed after the partial crystallization process. To determine the toughness of the as-cast and annealed samples, the indentation technique was used. These results revealed that the maximum hardness and toughness were depicted in the sample casted in the water-cooled copper mold and annealed up to 928°C. The reason of it can be attributed to the formation of crystalline clusters in the amorphous matrix of the samples casted in the graphite mold, so that this decrease in the cooling rate causes to changing the chemical composition of the amorphous matrix.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 1; 251-254
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of surface coating with palladium on hydrogen permeability of Pd33Ni52Si15 amorphous alloy membrane
Autorzy:
Prochwicz, W.
Macherzyński, W.
Paszkiewicz, B.
Stępień, Z.
Powiązania:
https://bibliotekanauki.pl/articles/173174.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
permeability
hydrogen
palladium alloys
metallic glasses
Opis:
In the paper, the effect of the surface coating with palladium on hydrogen permeation of a Pd33Ni52Si15 amorphous alloy membrane was investigated. We have measured the hydrogen flow through the melt-spun amorphous membrane covered with palladium film of 10, 20, and 30 nm in thickness. Membranes have been tested in the temperature rage 294–358 K, and at pressure fixed at 102 kPa. We investigate the role of this film thickness on the activation energy for hydrogen permeability. It seemed that a relatively thin layer of the palladium on the surface of the membrane which contains over 30% of this element, should not considerably influence the permeability of the membrane for hydrogen. The membrane hydrogen permeability is correlated to permeation activation energy: the lower activation energy is, the higher permeability is observed. The activation energy for permeation strongly depends on palladium film thickness. The rapid increase of its value was recorded when the film thickness was growing up. As the result, the increase of the film thickness suppressed hydrogen permeability. Our findings are discussed in terms of a potential barrier between the two different phases.
Źródło:
Optica Applicata; 2016, 46, 2; 173-179
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Magnetoelastic Characteristics of $Fe_{70}Ni_8Si_{10}B_{12}$ Amorphous Alloy Subjected to Thermo-Magnetic Treatment
Autorzy:
Bieńkowski, A.
Salach, J.
Szewczyk, R.
Kolano, R.
Powiązania:
https://bibliotekanauki.pl/articles/1813532.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.80.+q
75.50.Kj
Opis:
This paper presents the experimental results of the magnetic and magnetoelastic investigation on the properties of $Fe_{70}Ni_8Si_{10}B_{12}$ amorphous alloy, subjected to thermo-magnetic treatment. Samples were annealed at temperature 350°C for 1 hour, in parallel magnetic field (4 kA/m), as well as in transverse field (350 kA/m). Sample annealed without magnetic field was also tested. Magnetoelastic tests were performed under uniform compressive stress, applied to the ring-shaped core, perpendicularly to the direction of magnetizing field. The results indicated that the thermo-magnetic heat treatment changes the magnetic characteristics, but does not have a significant influence on the coarse of magnetoelastic characteristics of $Fe_{70}Ni_8Si_{10}B_{12}$ amorphous alloy.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 87-90
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miniaturowe, dwuosiowe czujniki pola magnetycznego - z rdzeniami z magnetyków amorficznych
Miniaturized, two axis magnetic field sensors with amorphous alloy cores
Autorzy:
Frydrych, P.
Szewczyk, R.
Salach, J.
Trzcinka, K.
Powiązania:
https://bibliotekanauki.pl/articles/277226.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
czujniki pola magnetycznego
anizotropia magnetyczna
magnetic field sensors
magnetic anisotropy
Opis:
W artykule przedstawiono koncepcję budowy dwuosiowych, transduktorowych czujników pola magnetycznego z rdzeniami z taśmy amorficznej. Jednocześnie przedstawiono nowatorską metodę kształtowania i badania charakterystyk magnesowania rdzeni ramkowych z taśmy amorficznej, wykorzystywanych jako rdzenie badanych czujników. Metoda ta umożliwia pomiar anizotropii magnetycznej rdzenia. Informacja o wartości anizotropii jest niezbędna przy budowie czujników dwuosiowych, a opisane do tej pory metody nie umożliwiały tego typu pomiarów.
Paper presents new conception of two-axis, fluxgate magnetic field sensors for measurements of Earth's magnetic field. Developed sensors utilizes soft amorphous alloys. Moreover paper presents new methodology of shaping and testing of magnetic characteristics of frame-shaped amorphous alloys cores utilized in such sensors. Presented methodology of testing enables direct measurements of magnetic anisotropy of amorphous alloy, what is required for development of two-axis fluxgate sensors.
Źródło:
Pomiary Automatyka Robotyka; 2011, 15, 2; 766-773
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Coupling Model to Magnetic After Effects in the $Fe_{72}Co_{10}Nb_{6}B_{12}$ Amorphous Alloy
Autorzy:
Haneczok, G.
Kubik, P.
Madej, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/1810609.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.75.+a
Opis:
It was shown that magnetic reluctivity measured versus time after demagnetization for pre-annealed samples of the $Fe_{72}Co_{10}Nb_6B_{12}$ amorphous alloy exhibits highly non-exponential behavior which can be described by the coupling model. The relaxation intensity and the coupling parameter describing correlation effects in free volume diffusion decrease with increasing 1 h annealing temperature indicating annealing out of free volume and formation of iron clusters in amorphous matrix.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 396-398
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Plastic Deformation on Devitrification of $Fe_{73.5}Nb_{3}Cu_{1}Si_{13.5}B_{9}$ Amorphous Alloy
Autorzy:
Csach, K.
Miškuf, J.
Juríková, A.
Powiązania:
https://bibliotekanauki.pl/articles/1367306.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
62.20.Hg
Opis:
The method of thermogravimetry in external magnetic field was modified using square wave alternate magnetic field for an estimation of the temperature dependence of the magnetization. This method was used for the study of influence of plastic deformation of the amorphous alloy $Fe_{73.5}Nb_{3}Cu_{1}Si_{13.5}B_{9}$ on the structural changes.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 98-99
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Layer Thickness on the Reflectance of a Quasi One-Dimensional Composite Built with Zr55Cu30Ni5Al10 Amorphous Alloy and Epoxy Resin
Autorzy:
Garus, Sebastian
Sochacki, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2049717.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amorphous alloy
aperiodic multilayer
mechanical waves
phononic crystal
bandgap
Opis:
The study examined the impact of the angle of incidence of mechanical waves on various types of quasi one-dimensional superlattice. Binary periodic structure, quasi-periodic distribution of Thue-Morse layers and Severin’s aperiodic multilayer were used. Using the concatenation and recursive rules, the distribution of layers was determined for individual structure types for generation numbers equal to 3, 4 and 5. The structures were selected so that the thickness of the composite was the same for each type of distribution for a given generation number value. Transfer Matrix Method algorithm was used to determine reflectance. The band structure of reflectance has been demonstrated for incidence angles up to 90 degrees at mechanical wave frequencies up to 50 kHz. The existence of wide bands of high reflectance above the acoustic frequencies was demonstrated for the analyzed structures. Increasing the layer thickness caused an inhomogeneous shifts of transmission peaks towards lower frequencies.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 2; 503-510
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The behavior of amorphous alloys under swift heavy ion irradiation at room temperature
Autorzy:
Didyk, A.
Hofman, A.
Savin, V.
Semina, V.
Hajewska, E.
Szteke, W.
Starosta, W.
Powiązania:
https://bibliotekanauki.pl/articles/148691.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
amorphous alloy
heavy ion irradiation
sputtering
surface structure
swelling
Opis:
Experimental results of irradiation effects by heavy ions with high inelastic energy losses at the surfaces of some amorphous alloys are presented. It was shown that all studied alloys strongly swelled: up to 15% for Ni58Nb42 under irradiation with the 305 MeV 86Kr ion at a fluence of 1015 ion/cm2. Besides, the sputtering (evaporation) process takes place, too. Calculations of the temperatures on the ion trajectory axis were presented. It was shown that the calculated temperatures are higher than the melting temperature and the evaporation temperature, too. From these findings we can conclude that the sputtering (evaporation) of atoms in amorphous alloys is present.
Źródło:
Nukleonika; 2005, 50, 4; 149-152
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Yttrium (Y) Substitution by Cerium (Ce) on Microstructure and Corrosion Behavior of Near-Equiatomic Alniy Medium-Entropy Amorphous Alloy Ribbons
Autorzy:
Zhang, Shuyan
Zhang, Zhibin
Wang, Xin
Gao, Yangyang
Liang, Xiubing
Powiązania:
https://bibliotekanauki.pl/articles/2106589.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
medium-entropy amorphous alloys
corrosion behavior
thermal stability analysis
microstructure
cerium content
Opis:
Through partially replacing Y element, Ce was added into near-equiatomic AlNiY medium-entropy amorphous alloy (denoted as MEAA) ribbons by the melt spinning process in this study. The differences of microstructure, thermal stability, hardness and corrosion resistance of Al33.3Ni33.3Y33.4-xCex(x = 0, 2, 5, 8, 13) alloy ribbons were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), differential scanning calorimeter (DSC) and Vickers-type hardness tester. The anti-corrosion performance in 3.5 wt.% NaCl solution of alloy ribbons was investigated elaborately through the general potentiodynamic polarization curves (Tafel) and electrochemical impedance spectroscopy (EIS). Results suggested that all ribbon samples could remain amorphous structure and the hardness are all above 510 HV0.1. With the increase of Ce content, the thermal stability begins to be gradually lower. However, according to the analysis of crystallization kinetics, all types of MEAA ribbons presents the relatively prominent thermal stability compared with traditional Al-based amorphous alloys. The corrosion current density raises firstly, then shows a decreasing trend, and has a slight increase at last. Therefore, appropriate content of Ce element can improve the corrosion protection performance of alloy ribbons and the 5 at.% Ce MEAA ribbons exhibited the excellent corrosion resistance in this study.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 637--643
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Zr and Nb on the Electrical and Magnetic Properties of the Fe-Zr-Nb-B-Cu Alloy
Autorzy:
Noh, Junghyun
Park, Seungyeon
Hwang, Haejin
Lim, Kyoungmook
Powiązania:
https://bibliotekanauki.pl/articles/350932.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
soft magnetic
magnetic properties
amorphous alloy
nanocrystalline alloy
electrical properties
Opis:
The present study, aims to investigate the effect of minor Zr and Nb alloying on soft magnetic and electrical properties of Fe86 (Zrx Nb1-x )7B6 Cu1 (x=1, 0.75, 0.5, 0.25) alloys. The investigated alloys were prepared through the melt spinning process. Within the examined compositional range (Nb up to 5.25 at%, respectively), the soft magnetic properties and electrical resistivity of the alloys continuously increase with increasing Nb content. However increasing the Nb content further decreases such properties. We could confirm the influence of ratio of Zr and Nb on grain growth and crystallization fraction during crystallization by using the soft magnetic properties and electrical properties.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 879-882
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infulence of recrystallization on damping properties of alloy Fe75Zr4Ti3B17Cu1
Autorzy:
Bocian, M.
Mech, R.
Myszka, W.
Przybylski, M.
Powiązania:
https://bibliotekanauki.pl/articles/348167.pdf
Data publikacji:
2016
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
experimental mechanics
metallic glass
amorphous alloy
material properties
material science
Opis:
It is expected that damping in amorphous metals change after its recrystallization. For this purpose study of this phenomena was investigated. An alloy Fe75 Z r4Ti3B17Cu1 was manufactured in a very specific conditions to obtain amorphous structure. To confirm structure of the manufactured material basic testing was conducted including XRD, AFM, LFM and SEM with EDS attachment. The study showed that the structure in fact is partially amorphous and partially nanocrystalline. To determine expected change of damping sample in form of rod was tested for bounce height in controlled conditions before and after heat treatment that changed materials structure. Obtained results indicate decrease of damping after heat treatment and therefore confirms initial assumption.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2016, 4; 123-134
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of injection method to modify titanium alloy Ti6Al4V
Autorzy:
Klimas, J.
Łukaszewicz, A.
Szota, M.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/285312.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomaterials
titanium alloy Ti-6Al-4V
massive amorphous alloy
Opis:
In the present work, the samples were subjected to a comparative analysis of the titanium alloy Ti6Al4V prepared by various methods. The research included a comparison of the following properties of manufactured elements: microstructure, phase composition and surface roughness. The test results clearly showed that these properties are different when using different method of casting. These changes allows the use of prepared elements in medicine.
Źródło:
Engineering of Biomaterials; 2014, 17, no. 128-129; 91-92
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Stability and Mechanism of Thermally Induced Crystallization of $Fe_{73.5}Cu_1Nb_3Si_{15.5}B_7$ Amorphous Alloy
Autorzy:
Vasić, M.
Minić, D.
Blagojević, V.
Žák, T.
Pizúrová, N.
David, B.
Powiązania:
https://bibliotekanauki.pl/articles/1402117.pdf
Data publikacji:
2015-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.dg
64.70.kd
64.70.pe
Opis:
Investigation of thermal stability of the alloy revealed stepwise crystallization process, manifested by two distinct complex exothermic peaks in differential scanning calorimetry curves. Kinetic parameters of individual crystallization steps were found using the Kissinger and Vyazovkin methods. Structural characterization of thermally treated samples showed formation of different iron-based phases including α-Fe(Si), Fe₂B, Fe₁₆Nb₆Si₇ and Fe₂Si and some metastable intermediary species. Morphology characterization of the surface and cross-section of the thermally treated samples showed granulated structure composed of several different phases and indicated occurrence of impingement effects during crystal growth. Value of estimated lifetime suggested very high stability against crystallization at room temperature and abrupt decrease of lifetime with temperature increase.
Źródło:
Acta Physica Polonica A; 2015, 128, 4; 657-660
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Prediction of Optimized Metalloid Content in Fe-Si-B-P Amorphous Alloys Using Artificial Intelligence Algorithm
Autorzy:
Lee, Min_Woo
Choi, Young-Sin
Kwon, Do-Hun
Cha, Eun-Ji
Kang, Hee-Bok
Jeong, Jae-In
Lee, Seok-Jae
Kim, Hwi-Jun
Powiązania:
https://bibliotekanauki.pl/articles/2176648.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe-based amorphous alloy
metalloid elements
artificial intelligence
coercivity
saturation magnetization
Opis:
Artificial intelligence operated with machine learning was performed to optimize the amount of metalloid elements (Si, B, and P) subjected to be added to a Fe-based amorphous alloy for enhancement of soft magnetic properties. The effect of metalloid elements on magnetic properties was investigated through correlation analysis. Si and P were investigated as elements that affect saturation magnetization while B was investigated as an element that affect coercivity. The coefficient of determination R2 (coefficient of determination) obtained from regression analysis by learning with the Random Forest Algorithm (RFR) was 0.95 In particular, the R2 value measured after including phase information of the Fe-Si-B-P ribbon increased to 0.98. The optimal range of metalloid addition was predicted through correlation analysis method and machine learning.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1539--1542
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extension of the Jiles-Atherton Model for Modelling the Frequency Dependence of Magnetic Characteristics of Amorphous Alloy Cores for Inductive Components of Electronic Devices
Autorzy:
Szewczyk, R.
Frydrych, P.
Powiązania:
https://bibliotekanauki.pl/articles/1507194.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ej
75.78.-n
Opis:
The paper presents the results of modelling the influence of magnetizing field frequency on the magnetic characteristics of $Fe_{40}Ni_{38}Mo_4B_{18}$ amorphous alloy in as-quenched state. An extension for the Jiles-Atherton model was applied and changes of the parameter k during the magnetization process were considered. On the base of the experiment, the parameters of the Jiles-Atherton model were calculated for experimental hysteresis loop. Evolutionary strategies, together with the gradient optimisation method, were used. Moreover, the changes of parameters c and a as the function of frequency of magnetizing field were also taken into consideration. Finally, the high conformity between the experimental and modelling results was achieved. This high conformity indicates that the results both create new possibilities in modelling of properties of inductive components based on the amorphous alloys, as well as extend the possibility of quantitative description of magnetization process.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 782-784
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Effect of Annealing the Fe$\text{}_{78}$Si$\text{}_{9}$B$\text{}_{13}$ Amorphous Alloy Using the EELS Method and the Hall Effect
Autorzy:
Kołodziej, H. B.
Jakubczyk, E.
Mandecki, Z.
Całusiński, B.
Powiązania:
https://bibliotekanauki.pl/articles/1929095.pdf
Data publikacji:
1993-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
Opis:
The effect of structural relaxation on the electronic structure of Fe$\text{}_{78}$Si$\text{}_{9}$B$\text{}_{13}$ metallic glass was investigated by means of the Hall effect, electrical conductivity and EELS methods. The effect of the structural relaxations was observed by four-hour annealing of the samples in argon atmosphere at temperatures 573, 673, 723, 773 K. The most distinct changes in the measured quantities were observed for samples annealed at 773 K. The differences in EELS spectrum, a decrease in the electrical and the Hall resistance are specific to these samples. X-ray diffractometry confirmed that the samples annealed at this temperature show recrystallization.
Źródło:
Acta Physica Polonica A; 1993, 83, 3; 327-331
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symulacja fizyczna w skali laboratoryjnej odlewania amorficznych stopów żelaza
Physical simulation of casting of bulk iron-based amorphous alloys
Autorzy:
Żak, A.
Burian, W.
Powiązania:
https://bibliotekanauki.pl/articles/182368.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica
Tematy:
stop amorficzny
stanowisko do odlewania masywnych stopów amorficznych
amorphous alloy
unit for casting of bulk amorphous alloys
Opis:
Stopy amorficzne są nową grupą materiałów charakteryzującą się w zależności od składu chemicznego, wysoką wytrzymałością rzędu 3-4 GPa i twardością około 8-12 MPa. W artykule przedstawiono fizyczne i techniczne podstawy procesu wytwarzania masywnych stopów żelaza o strukturze amorficznej oraz podano wyniki prób odlewania materiałów amorficznych w procesie odlewania ciśnieniowego wykonanych za pomocą laboratoryjnego stanowiska do wytapiania i odlewania znajdującego się w Zespole Technologii i Aplikacji Wyrobów Instytutu Metalurgii Żelaza.
Amorphous alloys make a new class of materials exhibiting high strength up to 3-4 GPa and hardness up to 8-12 MPa. The paper presents physical and technical bases of the process for manufacturing of bulk amorphous Fe-based alloys. Technical assumptions for construction of experimental unit for melting and casting and results of experimental high pressure casting of new amorphous alloys are described. On the basis of the constructional assumptions the laboratory unit for melting and casting of amorphous alloys was built at Product Technology and Application Group in the Institute for Ferrous Metallurgy.
Źródło:
Prace Instytutu Metalurgii Żelaza; 2012, T. 64, nr 1, 1; 169-174
0137-9941
Pojawia się w:
Prace Instytutu Metalurgii Żelaza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase Transformation Analysis of the Amorphous Mg72Zn24Ca4 Alloy
Autorzy:
Lelito, J.
Powiązania:
https://bibliotekanauki.pl/articles/947620.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mg-Zn-Ca alloy
amorphous alloy
metallic glass
crystallization
stop Mg-Zn-Ca
stop amorficzny
szkło metaliczne
krystalizacja
Opis:
The paper presents research of metallic glass based on a Mg72Zn24Ca4 alloy. Metallic glass was prepared using induction melting and further injection on a spinning copper wheel. The X-ray diffractometer and differential scanning calorimeter (DSC) were used to investigate the phase transformation of the amorphous ribbon. The heat released in the crystallization process, during isothermal annealing, based on the differential scanning calorimeter investigation, was determined to be 166.18 Jg-1. The effect of isothermal annealing temperature on the kinetics of the amorphous alloy crystallization process using differential scanning calorimeter was investigated. For this purpose, two isothermal annealing temperatures were selected. The incubation time decreases as the temperature of the isothermal annealing increases from 300 to 252 seconds. The same relationship is visible in the case of duration of the phase transformation, which also decreases as the temperature of the isothermal annealing increases from 360 to 228 seconds. The obtained results show a significant influence of isothermal annealing temperature on the degree of phase transformation.
Źródło:
Archives of Foundry Engineering; 2020, 20, 3; 21-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Ball Milling on the Local Atomic Structure of an Amorphous CoFeSiB Alloy
Autorzy:
Bednarcik, J.
Michalik, S.
Kollar, P.
Roth, S.
Powiązania:
https://bibliotekanauki.pl/articles/1534068.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
61.05.cp
64.70.dg
75.30.Kz
Opis:
It follows from experimental observations that ball milling induces substantial changes in an amorphous $Co_{70.3}Fe_{4.7}Si_{10}B_{15}$ (at.%) alloy. X-ray diffraction indicates formation of nanocrystalline bcc-(Co,Fe) phase during ball milling. As a consequence crystallization sequence is altered and the total enthalpy of crystallization reduces with the milling time. Furthermore thermomagnetic measurements reveal that specific magnetization and Curie temperature of amorphous phase are influenced by ball milling.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 825-826
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Structural Stability of the Fe36 Co36 Si19 B5 Nb4 Bulk Amorphous Alloy
Stabilność struktury masywnego stopu amorficznego Fe36 Co36 Si19 B5 Nb4
Autorzy:
Nabiałek, M.
Pietrusiewicz, P.
Szota, M.
Dobrzańska-Danikiewicz, A.
Lesz, S.
Dośpiał, M.
Błoch, K
Oźga, K.
Powiązania:
https://bibliotekanauki.pl/articles/354967.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bulk amorphous alloys
surface
diffusion process
microstructure
fracture surface morphology
masywny stop amorficzny
powierzchnia
proces dyfuzji
mikrostruktura
Opis:
In this paper, the results of the investigation into the fractured surface microstructure of the amorphous samples of Fe36 Co36 Si19 B5 Nb4 in the shape of rods of diameters: 1 mm, 2 mm and 3 mm in the as-cast state are presented. The samples were prepared by injection of molten alloy into cooled copper dies. The process of diffusion in the investigated material has a different speed depending on the temperature gradient within the volume of the rod. The atomic diffusion leads to the creation of different zones within the rod fracture: the zone in contact with the copper die, the intermediate fracture zone, and the zone in the vicinity of the rod core; the three zones have been found to exhibit different amorphous structures.
W pracy przedstawiono wyniki badań mikrostruktury na powierzchni przełomów próbek Fe36 Co36 Si19 B5 Nb4 amorficznych w postaci prętów o średnicy 1 mm. 2 mm i 3 mm. w stanie po zestaleniu. Pręty wytworzono metodą wtłaczania ciekłego stopu do miedzianej, chłodzonej cieczą formy. Proces dyfuzji atomów w badanym materiale charakteryzuje się inną dynamiką w zależności od gradientu temperatury w objętości pręta. Wyróżnia się trzy wyraźnie widoczne strefy: od kontaktu z miedzianą formą, strefę przejściową oraz strefę opisującą rdzeń pręta. Każdą z wyróżnionych stref charakteryzują różne konfiguracje atomów w zakresie stanu amorficznego. Na podstawie badań stwierdzono, że w masywnych materiałach amorficznych występuje fluktuacja składu oraz gęstości w zależności od szybkości chłodzenia.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 1; 259-262
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermopower and hardness characterization of structural relaxation and crystallization in FINEMET type amorphous precursor alloy
Autorzy:
Bán, K.
Szabó, A.
Ipach, R.
Szabó, B.
Powiązania:
https://bibliotekanauki.pl/articles/1053037.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
72.15.Jf
Opis:
In this paper, the thermopower (U) and hardness (HV) of FINEMET type glasses are studied during structural relaxation and beyond the crystallization onset. In this multicomponent alloy (Fe_{73.5-x}Si_{13.5}B_{9}Nb_{x}Cu_{1}) both property changes are more complex than that in binary Fe-B glasses. The phenomenon of relaxation and the crystallization onset can be successfully distinguished in both property changes. Simultaneously with the hardness increase, a slope increase in the thermopower versus temperature dependences was observed if crystallization started. The character of both property changes does alter drastically at the beginning of amorphous-nanocrystalline transformation. Similar trends were measured on samples undergoing traditional isothermal and pulse heat treatments.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 702-704
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ rekrystalizacji na właściwości tłumiące stopu Fe75Zr4Ti3B17Cu1
Influence of recrystallization on damping properties of Fe75Zr4Ti3B17Cu1 alloy
Autorzy:
Bocian, M.
Mech, R.
Myszka, W.
Przybylski, M.
Powiązania:
https://bibliotekanauki.pl/articles/131330.pdf
Data publikacji:
2016
Wydawca:
Uczelnia Jana Wyżykowskiego
Tematy:
mechanika eksperymentalna
szkło metaliczne
stop amorficzny
właściwości materiałowe
inżynieria materiałowa
experimental mechanics
metallic glass
amorphous alloy
material properties
material science
Opis:
Uważa się, że tłumienie w przypadku metali o strukturze amorficznej powinno ulec zmianie po ich rekrystalizacji. W niniejszej pracy przedstawiono wyniki badań tego zagadnienia. Badania przeprowadzono na stopie Fe75Zr4Ti3B17Cu1 wykonanym w taki sposób, aby otrzymać materiał o strukturze amorficznej. W celu określenia oczekiwanej zmiany w tłumieniu badanego materiału, przeprowadzono badania polegające na pomiarze wysokości odbicia, dla próbki przed obróbką termiczną i po takiej obróbce. Otrzymane rezultaty pokazały, że względne tłumienie próbki uległo zmniejszeniu po poddaniu jej obróbce cieplnej, tym samym potwierdzając wstępne założenia.
It is expected that damping in amorphous metals changes after their recrystallization. For this purpose a study of this phenomena was investigated. A Fe75Zr4Ti3B17Cu1 alloy was manufactured in very specific conditions to obtain amorphous structure. To determine expected change of damping, a sample in form of a rod was tested for bounce height in controlled conditions before and after heat treatment that changed the material structure. The obtained results indicate a decrease of damping after heat treatment and therefore confirm the initial assumption.
Źródło:
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych; 2016, 5; 65-74
2543-6740
Pojawia się w:
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approach to Ferromagnetic Saturation for the Bulk Amorphous Alloy: $(Fe_{0.61}Co_{0.10}Zr_{0.025}Hf_{0.025}Ti_{0.02}W_{0.02}B_{0.20})_{97}Y_{3}$
Autorzy:
Błoch, K.
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1386293.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.-y
75.50.Kj
75.30.Ds
75.20.En
75.47.Np
75.50.Bb
75.60.Ej
Opis:
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.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 413-414
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Defects in the FeCoYB Amorphous Alloys
Defekty strukturalne w amorficznych stopach FeCoYB
Autorzy:
Błoch, K.
Nabiałek, M.
Gondro, J.
Szota, M.
Powiązania:
https://bibliotekanauki.pl/articles/352848.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amorphous alloy
X-ray diffractometry
magnetisation process
structural defects
spin wave stiffness parameter
stop amorficzny
proces magnetyzacji
defekty strukturalne
parametr sztywności falispinowej
Opis:
The aim of this work was to determine the nature of the structural defects that have a major influence on the magnetisation process within the investigated alloys. The structure of the alloys in the as-quenched state was investigated by means of X-ray diffractometry. It was confirmed that the samples were amorphous. The magnetisation was measured within magnetic fields ranging from 0 to 2T using a vibrating sample magnetometer (VSM). The investigation of the ‘magnetisation in the area close to ferromagnetic saturation’ showed that, for this class of alloys, the magnetisation process in strong magnetic fields is connected with the following two influences: 1) Firstly, the rotation of the magnetic moments in the vicinity of the defects, which are the sources of the short-range stresses, and, 2) The dumping of the thermally-induced spin waves by the magnetic field. In the case of the Fe63CoY7B20 alloy, the magnetisation process is connected with both point and linear defects, whereas for the Fe64Co10Y6B20 alloy, only with linear defects. This suggests that the size of the defects, determining the character of the magnetisation in the vicinity of ferromagnetic saturation, depends on the atomic packing density. On the basis of analysis of the magnetisation curves, the spin wave stiffness parameter (Dsp) was calculated.
Celem pracy było określenie defektów strukturalnych mających decydujący wpływ na proces magnesowania stopów. Strukturę stopów w stanie po zestaleniu badano za pomocą rentgenowskiej analizy dyfrakcyjnej. Stwierdzono, że badane próbki były bezpostaciowe.. Magnetyzację mierzono w silnym polu magnetycznym (0-2 T) przy użyciu magnetometru wibracyjnego (VSM). Badania magnetyzacji w pobliżu ferromagnetycznego nasycenia wykazały, że proces przemagnesowania badanych stopów w silnych polach magnetycznych związany jest z obrotami momentów magnetycznych w pobliżu defektów będących źródłami naprężeń bliskiego zasięgu oraz z tłumieniem przez pole magnetyczne termicznie wzbudzanych fal spinowych. W przypadku stopu Fe,sub>63Co10Y7B20 za proces magnesowania w silnych polach odpowiedzialne są defekty punktowe oraz liniowe, natomiast w stopie Fe64Co10Y6B20 tylko defekty liniowe. Wskazuje to, że wielkość defektów decydujących o charakterze zmian magnetyzacji w pobliżu ferromagnetycznego nasycenia zależy od gęstości upakowania atomów. Na podstawie analizy krzywych namagnesowania wyznaczono parametr sztywności fali spinowej Dsp.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 2019-2023
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystallization of FeSiB Amorphous Ribbons Induced by Laser Interference Irradiation
Autorzy:
Kusinski, J.
Czyż, O.
Radziszewska, A.
Morgiel, J.
Ostrowski, R.
Strzelec, M.
Czyż, K.
Rycyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/379811.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
laser interference heating
FeSiB alloy
amorphous alloy
scanning electron microscopy
transmission electron microscopy
stop FeSiB
stop amorficzny
skaningowa mikroskopia elektronowa
transmisyjna mikroskopia elektronowa
Opis:
Detailed studies on the effects of pulsed laser interference heating on surface characteristics and subsurface microstructure of amorphous Fe80Si11B9 alloy are reported. Laser interference heating, with relatively low pulsed laser energy (90 and 120 mJ), but with a variable number (from 50-500) of consecutive laser pulses permitted to get energy accumulation in heated areas. Such treatment allowed to form two- Dimensional micro-islands of laser-affected material periodically distributed in amorphous matrix. The crystallization process of amorphous FeSiB ribbons was studied by means of scanning and transmission electron microscopy. Detailed microstructural examination showed that the use of laser beam, resulted in development of nanostructure in the heated areas of the amorphous ribbon. The generation of nanocrystalline seed islands created by pulsed laser interference was observed. This key result may evidently give new knowledge concerning the differences in microstructure formed during the conventional and lased induced crystallization the amorphous alloys. Further experiments are needed to clarify the effect of pulsed laser interference crystallization on magnetic properties of these alloys.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 27-30
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości magnetyczne i mikrostruktura kompozytów wytworzonych na bazie amorficznego stopu Fe60Co10Y8Zr1B20 spajanego żywicą epoksydową
Structure and magnetic properties of material composed from amorphous Fe60Co10Y8Zr1B20 particles bonded with epoxy resin
Autorzy:
Nabiałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/278764.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
kompozyt
materiał kompozytowy
materiał amorficzny
stop amorficzny
żywica epoksydowa
magnetyzacja
mikrostruktura
właściwości magnetyczne
composite
composite material
amorphous material
amorphous alloy
epoxy resin
magnetization
microstructure
magnetic properties
Opis:
W pracy przedstawiono wyniki badań kompozytów wykonanych na bazie stopu amorficznego o składzie chemicznym Fe60Co10Y8Zr1B20 i żywicy epoksydowej. Badane próbki miały kształt walców o takich samych wymiarach i takiej samej zawartości Epidianu 100. Amorficzny stop objętościowy został niskoenergetycznie rozkruszony i rozdzielony na trzy frakcje: 20 - 50 μm, 50 - 100 μm i 100 - 200 μm a następnie zespolony przy użyciu Epidianu 100. W wyniku przeprowadzonych badań mikrostruktury stwierdzono, że kompozyt na bazie metalicznego stopu jest amorficzny. Stwierdzono również, że rozwinięcie powierzchni dla kompozytu złożonego z metalicznych drobin o frakcji 20 - 50 μm było najmniejsze. Mikrotwardość badanych próbek, niezależnie od wielkości metalicznych drobin była porównywalna. Na podstawie analizy badań magnetyzacji w funkcji natężenia pola magnetycznego wykazano, że wartość pola koercji dla badanych kompozytów rośnie wraz z rozkładem wielkości cząstek metalicznych. Pokazano również, że wielkość frakcji ma znikomy wpływ na wartość magnetyzacji nasycenia.
The paper presents the studies of composites, made from amorphous alloy particles with the chemical composition of Fe60Co10Y8Zr1B20 and epoxy resin. The investigated samples had cylindrical shapes of the same size and contained the same weight content of Epidian 100. The volumetric amorphous alloy was low energy-grinded and separated into three fractions: 20 - 50 μm, 50 - 100 μm and 100 - 200 μm. According to the microstructure studies, it was found that the metal-based alloy is amorphous. It was also found, that the development of the surface of the composite, made up of particles of metallic fraction of 20 - 50 microns, was the lowest. The microhardness of the studied samples, regardless of the size of the metallic particles, was comparable. Based on the analysis of the studies of magnetization as a function of magnetic field strength it was shown that the coercivity field value for the analyzed composites increases with increasing fractions of the metal particles. It was also shown that the fraction size has little effect on the value of the saturation magnetization.
Źródło:
Przetwórstwo Tworzyw; 2014, [R.] 20, nr 1 (157), 1 (157); 56-61
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
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
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