Magnetic properties of FeCuMSiB (M = Cr, V, Mo, Nb, Ta, W) alloys

Yoshizawa, Y.; Yamauchi, Kenta

doi:10.1016/0921-5093(91)90043-m

Cited by 199 publications

(44 citation statements)

References 4 publications

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“…Even at an optimal annealing condition, Fe 73:5 Cu 1 V 3 Si 13:5 B 9 annealed ribbon has a lower permeability (only 0:5 Â 10 4 at 1 kHz), as its average grain size ofFe(Si) is large (about 41 nm). 9) In the present work, we indicate that Fe-Cu-V-Si-B nanocrystalline ribbons can be prepared successfully using a melt-spinning technique without annealing processes. With a wheel speed of 40 m/s, the average grain size of -Fe(Si) for as-spun Fe 72 Cu 2:5 V 3 -Si 13:5 B 9 nanocrystalline ribbon reduces to 12 nm, and its initial permeability reaches to 2:4 Â 10 4 , which is larger than the permeability values of Fe-Cu-V-Si-B annealed ribbons.…”

Section: )mentioning

confidence: 83%

“…Different from the case of as-spun It has been found that a high temperature (650 C) annealing results in the precipitation of Fe 3 B phase from remaining amorphous phases in Fe 73:5 Cu 1 Nb 3 Si 13:5 B 9 annealed ribbon. 9) Interestingly, the high addition of Cu induces the precipitation of Fe-B phase in Fe 74:5Àx Cu x V 3 Si 13:5 B 9 asspun ribbons. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Previous experimental results 9) indicated that for Fe-Cu-TSi-B (T = Nb, Mo, Ta, V, etc.) annealed ribbons, the average grain size of -Fe(Si) for obtaining good soft magnetic properties had to be controlled in range of 8-18 nm, and the grain size was reduced in order of Nb = Ta > Mo = W > V > Cr.…”

Section: )mentioning

confidence: 99%

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Fe74.5−xCuxV3Si13.5B9 as-Spun Ribbons Prepared by Melt-Spinning Technique

Qin

et al. 2008

Mater. Trans.

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Fe-Cu-V-Si-B nanocrystalline ribbons can be prepared using a melt-spinning technique without annealing processes. An appropriate addition of Cu improves the nucleation of -Fe(Si) in as-spun Fe 74:5Àx Cu x V 3 Si 13:5 B 9 ribbons. There is an optimal Cu content, about x ¼ 2:5, for obtaining largest permeability and lowest magnetostriction in as-spun Fe 74:5Àx Cu x V 3 Si 13:5 B 9 ribbons. The permeability value (about 2:4 Â 10 4 ) of as-spun Fe 72 Cu 2:5 V 3 Si 13:5 B 9 (x ¼ 2:5) is much larger than that of Fe 73:5 Cu 1 V 3 Si 13:5 B 9 annealed ribbons, due to the grain size of -Fe(Si) for the former (12 nm) smaller than the later (41 nm). The smaller grain size of -Fe(Si) for as-spun ribbon Fe 72 Cu 2:5 V 3 Si 13:5 B 9 may be attributed to the refinement effect of Cu and the effect of high wheel speed in melt-spinning processes. Meanwhile, we have suggested that the capability of an element expelled from -Fe(Si) and partitioned in the remaining amorphous phase is connected with the refinement of -Fe(Si) grains. Based on Darken-Gurry solid solubility model, we have derived that the grain size of -Fe(Si) reduces in order of Ta > Nb > Mo > W > V > Cr, which agrees to the experimental data very well. In addition, the DO 3 ordered superstructure of -Fe(Si) is observed in as-spun Fe 74:5Àx Cu x V 3 Si 13:5 B 9 ribbons, however it seems that the ordered degree of -Fe(Si) grain is not a criterion for obtaining strong soft magnetic properties.

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Section: )mentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

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Fe74.5−xCuxV3Si13.5B9 as-Spun Ribbons Prepared by Melt-Spinning Technique

Qin

et al. 2008

Mater. Trans.

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“…annealed ribbons have analogous microstructures with nanometer-ordered -Fe(Si), where the grain size was reduced most by Nb ¼ Ta > Mo ¼ W > V > Cr. 8) We have reported that as-quenched Fe-Cu-(Nb,V)-Si-B 9) and Fe-Cu-Mo-Si-B 10) nanocrystalline ribbons can be prepared by melt-spinning technique. In this way, it can be expected that Fe-Cu-Ta-Si-B nanocrystalline ribbons with appropriate Cu contents may be prepared without thermal-treatment.…”

Section: -7)mentioning

confidence: 99%

Magnetic Properties of Fe74.5−xCuxTa3Si13.5B9 As-Quenched Ribbons

Qin

et al. 2008

Mater. Trans.

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Fe 74:5Àx Cu x Ta 3 Si 13:5 B 9 nanocrystalline ribbons with appropriate Cu contents can be prepared without annealing processes. The Fe 74:5Àx Cu x Ta 3 Si 13:5 B 9 as-quenched ribbons with lower Cu contents (x 1:5) consist of amorphous structure. The nucleation of -Fe(Si) enhances with the increase of Cu content. An optimal Cu addition for obtaining the largest permeability, smallest saturation magnetostriction and largest magnetoimpedance occurs at x % 3. For as-quenched ribbons with high Cu contents (x ! 3:5), soft magnetic properties deteriorate due to the drop of nucleation of -Fe(Si) and the precipitation of Fe-B phases. For as melt-spun Fe 71:5 Cu 3 Ta 3 Si 13:5 B 9 (x ¼ 3) nanocrystalline ribbon prepared with wheel speed of 40 ms À1 , the average grain-size of -Fe(Si) is about 10.5 nm, the initial permeability 0 is about 35000, the saturation magnetostriction s is less than 1 Â 10 À6 , and the maximum value of magnetoimpedance ÁZ=Z 0 under a field of 7162 A/m is À12:88% at 2 MHz.

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“…The structure of ribbons was in amorphous state to be crystallized for the nano-grain structure: The annealing temperature was decided from the differential scanning calorimetry (DSC) results of the alloy ribbons. Figure 1 shows the DSC curves of the ribbons, indicating the relationship between the glass transition temperature (T g ), and the first and second crystallization temperature (T x1 for α-Fe(Si) and T x2 for Fe-boride) [32,33]. The Ca and Al containing alloy showed the relatively large temperature gap (ΔT) between T x1 and T x2 , compared to the other alloys.…”

Section: Resultsmentioning

confidence: 99%

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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Magnetic properties of FeCuMSiB (M = Cr, V, Mo, Nb, Ta, W) alloys

Cited by 199 publications

References 4 publications

Fe<SUB>74.5−<I>x</I></SUB>Cu<I><SUB>x</SUB></I>V<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> as-Spun Ribbons Prepared by Melt-Spinning Technique

Fe<SUB>74.5−<I>x</I></SUB>Cu<I><SUB>x</SUB></I>V<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> as-Spun Ribbons Prepared by Melt-Spinning Technique

Magnetic Properties of Fe<SUB>74.5−<I>x</I></SUB>Cu<I><SUB>x</SUB></I>Ta<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> As-Quenched Ribbons

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

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Magnetic properties of FeCuMSiB (M = Cr, V, Mo, Nb, Ta, W) alloys

Cited by 199 publications

References 4 publications

Fe<SUB>74.5&minus;<I>x</I></SUB>Cu<I><SUB>x</SUB></I>V<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> as-Spun Ribbons Prepared by Melt-Spinning Technique

Fe<SUB>74.5&minus;<I>x</I></SUB>Cu<I><SUB>x</SUB></I>V<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> as-Spun Ribbons Prepared by Melt-Spinning Technique

Magnetic Properties of Fe<SUB>74.5&minus;<I>x</I></SUB>Cu<I><SUB>x</SUB></I>Ta<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> As-Quenched Ribbons

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

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Fe<SUB>74.5−<I>x</I></SUB>Cu<I><SUB>x</SUB></I>V<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> as-Spun Ribbons Prepared by Melt-Spinning Technique

Fe<SUB>74.5−<I>x</I></SUB>Cu<I><SUB>x</SUB></I>V<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> as-Spun Ribbons Prepared by Melt-Spinning Technique

Magnetic Properties of Fe<SUB>74.5−<I>x</I></SUB>Cu<I><SUB>x</SUB></I>Ta<SUB>3</SUB>Si<SUB>13.5</SUB>B<SUB>9</SUB> As-Quenched Ribbons