Solidification behavior, glass forming ability and thermal characteristics of soft magnetic Fe–Co–B–Si–Nb–Cu bulk amorphous alloys

Aykol, Muratahan; Akdeniz, M. Vedat; Mekhrabov, Amdulla O.

doi:10.1016/j.intermet.2011.05.004

Cited by 34 publications

(9 citation statements)

References 27 publications

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“…Эти сплавы применяются в качестве высокочувствительных датчиков и сенсоров и представляют собой магнитомягкие материалы с коэрцитивной силой, не превышающей 2 A/m [2]. Одним из недостатков этих материалов, сдерживающим широкое применение, является относительно низкая стеклообразующая способность (glass-forming ability -GFA) [3]. Способам расчета GFA посвящено много работ [4][5][6][7][8].…”

Section: Introductionunclassified

Электрическое сопротивление и магнитная восприимчивость сплавов CoFeSiBNb + REM при высоких температурах

Русанов¹,

Сидоров²,

Михайлов³

et al. 2021

Журнал Технической Физики

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Electrical resistivity and magnetic susceptibility of Co48Fe25Si4B19Nb4 + R (R = Nd, Sm, Tb, Yb) alloys in crystalline and liquid states were studied in present work. Electronic characteristics (effective magnetic moment, density of states at the Fermi level and paramagnetic Curie temperature) were calculated from experimental data. It is shown that all rare earth metals that were used should increase the glass-forming ability of alloys, but neodymium and samarium can have the greatest effect.

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Section: Introductionunclassified

Электрическое сопротивление и магнитная восприимчивость сплавов CoFeSiBNb + REM при высоких температурах

Русанов¹,

Сидоров²,

Михайлов³

et al. 2021

Журнал Технической Физики

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“…Some attempts have been made to synthesize Fe-based bulk nanocrystalline alloys with high GFA and SMPs. Resultantly, a series of alloys have been successfully developed [12][13][14][15][16][17][18], which can be made into thick ribbons or nanocrystalline rod-shaped samples. Recently, by logically adding Cu, FeSiBPNbCu alloys with high GFA and SMPs were successfully developed by our team [18].…”

Section: Introductionmentioning

confidence: 99%

FeSiBPNbCu Bulk Nanocrystalline Alloys with High GFA and Excellent Soft-Magnetic Properties

Liu

Zhou

Zhang

et al. 2019

Metals

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(Fe0.76Si0.09B0.1P0.05)99.3−xNbxCu0.7 (x = 0–1.5 at. %) bulk nanocrystalline alloys were prepared to investigate the alloying effects of Nb on glass forming ability, thermal stability, soft magnetic properties, and crystallization behavior. It was found that the amorphous forming ability was greatly improved with the addition of minor Nb. The thermal stability of Nb-containing alloy was significantly improved because the initial crystallization temperature and crystallization activation of the primary phase were obviously better than that of the Nb-free alloy. Further, the larger intervals of two-phase crystallization temperature and the significantly higher activation energy of crystallization of the second phase in the Nb-containing alloys favor the formation of a single α-Fe(Si) nanocrystalline structure. Moreover, Nb-containing alloys exhibit excellent soft magnetic properties, including high saturation magnetization of 1.42–1.49 T, low coercivity of around 1.0 A/m, and high permeability of about 18,000 at 1 kHz, which makes the alloys promising soft magnetic materials for industrial applications.

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“…They have very attractive structural and functional properties, as, for example, a fracture strength r f of $4000 MPa, a saturation magnetization M s of $1T, a relative permeability l of $12,000, as well as a coercivity H c of 2 A/m. 13,[27][28][29] The thermal stability, phase evaluation, kinetic parameters, and magnetic properties of these glassy alloys were evaluated. The results give more details to understand the relationship between the transformation of the metastable glassy phase and the improvement of the soft magnetic properties upon Cu addition and they are discussed in comparison with the parent alloy [(Fe 0.5 Co 0.5 ) 0.75 B 0.2 Si 0.05 ] 96 Nb 4 .…”

Section: Introductionmentioning

confidence: 99%

Kinetic analysis of the non-isothermal crystallization process, magnetic and mechanical properties of FeCoBSiNb and FeCoBSiNbCu bulk metallic glasses

Ramasamy

Stoica

Taghvaei

et al. 2016

Journal of Applied Physics

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The crystallization kinetics of [(Fe 0.5 Co 0.5) 0.75 B 0.2 Si 0.05 ] 96 Nb 4 and {[(Fe 0.5 Co 0.5) 0.75 B 0.2 Si 0.05 ] 0.96 Nb 0.04 } 99.5 Cu 0.5 bulk metallic glasses were evaluated using differential scanning calorimetry under non-isothermal condition. The fully glassy rods with diameters up to 2 mm were obtained by copper mold injection casting. Both glasses show good thermal stability, but the addition of only 0.5% Cu completely changes the crystallization behavior. The average activation energy required for crystallization decreases from 645 kJ/mol to 425 kJ/mol after Cu addition. Upon heating, the Cu-free alloy forms only the metastable Fe 23 B 6 phase. In contrast, two well-separated exothermic events are observed for the Cu-added bulk glassy samples. First, the (Fe,Co) phase nucleates and then (Fe,Co) 2 B and/or (Fe,Co) 3 B crystallize from the remaining glassy matrix. The Cu-added alloy exhibits a lower coercivity and a higher magnetic saturation than the base alloy, both in as-cast as well as in annealed condition. Besides, the Cu-added glassy sample with 2 mm diameter exhibits a maximum compressive fracture strength of 3913 MPa together with a plastic strain of 0.6%, which is highest plastic strain ever reported for 2 mm diameter ferromagnetic bulk metallic glass sample. Although Cu addition improves the magnetic and mechanical properties of the glass, it affects the glass-forming ability of the base alloy.

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Solidification behavior, glass forming ability and thermal characteristics of soft magnetic Fe–Co–B–Si–Nb–Cu bulk amorphous alloys

Cited by 34 publications

References 27 publications

Электрическое сопротивление и магнитная восприимчивость сплавов CoFeSiBNb + REM при высоких температурах

Электрическое сопротивление и магнитная восприимчивость сплавов CoFeSiBNb + REM при высоких температурах

FeSiBPNbCu Bulk Nanocrystalline Alloys with High GFA and Excellent Soft-Magnetic Properties

Kinetic analysis of the non-isothermal crystallization process, magnetic and mechanical properties of FeCoBSiNb and FeCoBSiNbCu bulk metallic glasses

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