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Soft magnetic properties of nanocrystalline Fe73B7Si16Nb3Cu1 alloy after rapid heating under tensile stress.

Nosenko A, Mika T, Rudenko O, Yarmoshchuk Y, Nosenko V - Nanoscale Res Lett (2015)

Bottom Line: As a result, strong transverse magnetic anisotropy was induced in the ribbon.Tensile stress increase from 0 to 180 MPa was shown to result in the decrease of the initial magnetic permeability down to 400 and core loss at frequencies from 0.4 to 200 kHz.The magnetic properties of the latter cores are advantageous for manufacturing the reactors and linear chokes of switch-mode power supplies.

View Article: PubMed Central - PubMed

Affiliation: G.V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine, 36, Academician Vernadsky Boulevard, Kyiv, 03142 Ukraine.

ABSTRACT
Amorphous Fe73B7Si16Nb3Cu1 ribbon was crystallized rapidly by electric current heating under simultaneously applied tensile stress along the ribbon axis. As a result, strong transverse magnetic anisotropy was induced in the ribbon. Dynamic magnetic properties of the ribbons rapidly heated either under the tensile stress or without tensile stress were measured using toroidal cores. Optimal electric current heating regime that provides maximum improvement of the initial magnetic permeability and core loss was determined. Tensile stress increase from 0 to 180 MPa was shown to result in the decrease of the initial magnetic permeability down to 400 and core loss at frequencies from 0.4 to 200 kHz. Comparative analysis of magnetic properties of the cut core (with non-magnetic gap) and the cores heated under tensile stress was carried out. The magnetic properties of the latter cores are advantageous for manufacturing the reactors and linear chokes of switch-mode power supplies.

No MeSH data available.


Related in: MedlinePlus

X-ray diffraction patterns of the ribbons. (Mo Ka radiation): (curve a) as-quenched amorphous ribbon, (curve b) after the annealing in a furnace (Ta = 550°C, ta = 90 min), and (curve c) after the heating by electric current (jh = 42 A/mm2, th = 3.7 s).
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Fig5: X-ray diffraction patterns of the ribbons. (Mo Ka radiation): (curve a) as-quenched amorphous ribbon, (curve b) after the annealing in a furnace (Ta = 550°C, ta = 90 min), and (curve c) after the heating by electric current (jh = 42 A/mm2, th = 3.7 s).

Mentions: Thus, observing dilatometer effects, it was found that during the first cycle of heating-cooling, irreversible structural changes occur in the as-quenched amorphous ribbon that are related to the nanocrystallization process of the ribbon during its electric current rapid heating. This is supported by X-ray diffraction studies of the ribbon before and after annealing (Figure 5). Broadened reflections are observed in X-ray diffraction pattern that indicates the formation of large volume fractions DO3-type ordered nanocrystals of α-Fe(Si) solid solution.Figure 5


Soft magnetic properties of nanocrystalline Fe73B7Si16Nb3Cu1 alloy after rapid heating under tensile stress.

Nosenko A, Mika T, Rudenko O, Yarmoshchuk Y, Nosenko V - Nanoscale Res Lett (2015)

X-ray diffraction patterns of the ribbons. (Mo Ka radiation): (curve a) as-quenched amorphous ribbon, (curve b) after the annealing in a furnace (Ta = 550°C, ta = 90 min), and (curve c) after the heating by electric current (jh = 42 A/mm2, th = 3.7 s).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385284&req=5

Fig5: X-ray diffraction patterns of the ribbons. (Mo Ka radiation): (curve a) as-quenched amorphous ribbon, (curve b) after the annealing in a furnace (Ta = 550°C, ta = 90 min), and (curve c) after the heating by electric current (jh = 42 A/mm2, th = 3.7 s).
Mentions: Thus, observing dilatometer effects, it was found that during the first cycle of heating-cooling, irreversible structural changes occur in the as-quenched amorphous ribbon that are related to the nanocrystallization process of the ribbon during its electric current rapid heating. This is supported by X-ray diffraction studies of the ribbon before and after annealing (Figure 5). Broadened reflections are observed in X-ray diffraction pattern that indicates the formation of large volume fractions DO3-type ordered nanocrystals of α-Fe(Si) solid solution.Figure 5

Bottom Line: As a result, strong transverse magnetic anisotropy was induced in the ribbon.Tensile stress increase from 0 to 180 MPa was shown to result in the decrease of the initial magnetic permeability down to 400 and core loss at frequencies from 0.4 to 200 kHz.The magnetic properties of the latter cores are advantageous for manufacturing the reactors and linear chokes of switch-mode power supplies.

View Article: PubMed Central - PubMed

Affiliation: G.V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine, 36, Academician Vernadsky Boulevard, Kyiv, 03142 Ukraine.

ABSTRACT
Amorphous Fe73B7Si16Nb3Cu1 ribbon was crystallized rapidly by electric current heating under simultaneously applied tensile stress along the ribbon axis. As a result, strong transverse magnetic anisotropy was induced in the ribbon. Dynamic magnetic properties of the ribbons rapidly heated either under the tensile stress or without tensile stress were measured using toroidal cores. Optimal electric current heating regime that provides maximum improvement of the initial magnetic permeability and core loss was determined. Tensile stress increase from 0 to 180 MPa was shown to result in the decrease of the initial magnetic permeability down to 400 and core loss at frequencies from 0.4 to 200 kHz. Comparative analysis of magnetic properties of the cut core (with non-magnetic gap) and the cores heated under tensile stress was carried out. The magnetic properties of the latter cores are advantageous for manufacturing the reactors and linear chokes of switch-mode power supplies.

No MeSH data available.


Related in: MedlinePlus