Structure and magnetic behaviour of Fe–Cu–Nb–Si–B–Al alloys

Zorkovská, A.; Kováč, J.; Sovák, P.; Petrovič, P.; Konč, M.

doi:10.1016/s0304-8853(00)00201-8

Cited by 22 publications

(14 citation statements)

References 2 publications

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“…No significant influence of the film thickness (up to 100 nm) on their structure was observed. Heat treatment at 350 • C starts the partial crystallization of all the samples, similarly as for nanocrystalline Finemet-type ribbons, which was observed in our previous study [2,6]. The mean grain size of the crystals is about 10 nm.…”

Section: Resultssupporting

confidence: 71%

“…The comparison of the thermomagnetic curves suggests the coexistence of ferromagnetic and paramagnetic components in the alloys. Curves taken from dependence of magnetization versus magnetic field at temperature 250-500 • C give evidence that the alloy becomes paramagnetic at temperature above 450 • C. Mössbauer analysis indicates that during annealing Al enters the grains and more or less ordered α-Fe(Si,Al) phase appears [6].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Substitutions on Crystallization and Magnetic Properties of Finemet-based Nanocrystalline Alloys and Thin Films

Sovák¹,

Pavlík²,

Tauš³

et al. 2004

Czech J Phys

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Nanocrystalline Finemet-based alloys Fe 73.5−x M x Nb 3−y RE y Cu 1 Si 13.5 B 9 (M = Al, RE= Nd, Pr, Gd) in the form of amorphous ribbons prepared by melt-spinning technique and thin films prepared by flash or sputtering techniques were investigated. We have paid attention to the influence of substitutions on crystallization and magnetic properties of the samples. The influence of film thickness and annealing temperature on the structure and magnetic properties of finemetic thin films were studied. Nb and Fe were replaced by rare-earth atoms and Al in Finemet, respectively.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Influence of Substitutions on Crystallization and Magnetic Properties of Finemet-based Nanocrystalline Alloys and Thin Films

Sovák¹,

Pavlík²,

Tauš³

et al. 2004

Czech J Phys

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show abstract

“…The Ca and Al containing alloy showed the relatively large temperature gap (ΔT) between T x1 and T x2 , compared to the other alloys. Based on the results, it can be concluded that Ca and Al additions generally improve the thermal stability of the nanocrystalline structure of the α-Fe(Si) phase [34][35][36][37][38].…”

Section: Resultsmentioning

confidence: 94%

Effect of Ca and Al Additions on the Magnetic Properties of Nanocrytalline Fe-Si-B-Nb-Cu Alloy Powder Cores

Moon¹,

Kim²,

Sohn³

et al. 2016

Journal of Magnetics

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The Fe-Si-B-Nb-Cu alloys containing Ca and Al were rapidly solidified to thin ribbons by melt-spinning. The ribbons were ball-milled to make powders, and then mixed with 1 wt.% water glass and 1.5 wt.% lubricant. The mixed powders were burn-off, and then compacted to form toroidal-shaped cores, which were heat treated to crystallize the nano-grain structure and to remove residual stress of material. The characteristics of the powder cores were analyzed using a differential scanning calorimetry (DSC) and a B-H meter. The microstructures were observed using transmission electron microscope (TEM). The optimized soft magnetic properties (µ i and P cv ) of the powder cores were obtained from the Ca and Al containing alloys after annealing at 530 °C for 1 h. The core loss of Fe-Si-B-Nb-Cu-based powder cores was reduced by the addition of Ca element, and the initial permeability increased due to the addition of Al element.

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“…Lim et al [19] and Zorkovska et al [20] have found that the T x1 of Fe 73.5-x Si 13.5 B 9 Cu 1 Nb 3 Al x amorphous alloy decreases with increase of Al. Warren et al [21] have investigated the spatial distribution of atoms in the nanocrystalline Fe 71.5 Si 13.5 B 9 Cu 1 Nb 3 Al 2 alloy through a three-dimensional atom probe, and found the decrease of T x1 is attributed to the solution of Al into the Cu clusters, which enhances the precipitation of nanocrystals.…”

Section: Resultsmentioning

confidence: 98%

Microstructural Change and Magnetic Properties of Nanocrystalline Fe-Si-B-Nb-Cu Based Alloys Containing Minor Elements

Nam¹,

Moon²,

Sohn³

et al. 2014

Journal of Magnetics

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The effect of minor element additions (Ca, Al) on microstructural change and magnetic properties of Fe-NbCu-Si-B alloy has been investigated, in this paper. The Fe-Si-B-Nb-Cu(-Ca-Al) alloys were prepared by arc melting in argon gas atmosphere. The alloy ribbons were fabricated by melt-spinning, and heat-treated under a nitrogen atmosphere at 520-570 o C for 1 h. The soft magnetic properties of the ribbon core were analyzed using the AC B-H meter. A differential scanning calorimetry (DSC) was used to examine the crystallization behavior of the amorphous alloy ribbon. The microstructure was observed by X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). The addition of Ca increased the electrical resistivity to reduce the eddy current loss. And the addition of Al decreased the intrinsic magnetocrystalline anisotropy K 1 resulting in the increased permeability. The reduction in the size of the α-Fe precipitates was observed in the alloys containing of Ca and Al. Based on the results, it can be concluded that the additions of Ca and Al notably improved the soft magnetic properties such as permeability, coercivity and core loss in the Fe-Nb-Cu-Si-B base nanocrystalline alloys.

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Structure and magnetic behaviour of Fe–Cu–Nb–Si–B–Al alloys

Cited by 22 publications

References 2 publications

Influence of Substitutions on Crystallization and Magnetic Properties of Finemet-based Nanocrystalline Alloys and Thin Films

Influence of Substitutions on Crystallization and Magnetic Properties of Finemet-based Nanocrystalline Alloys and Thin Films

Effect of Ca and Al Additions on the Magnetic Properties of Nanocrytalline Fe-Si-B-Nb-Cu Alloy Powder Cores

Microstructural Change and Magnetic Properties of Nanocrystalline Fe-Si-B-Nb-Cu Based Alloys Containing Minor Elements

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