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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

Dependencies of core loss (a) and initial magnetic permeability (b) on frequency. (1) Core annealed in furnace (Ta = 550°C, ta = 90 min). (2) Core made of ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s). (3) Core made of helix-like ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s).
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Fig6: Dependencies of core loss (a) and initial magnetic permeability (b) on frequency. (1) Core annealed in furnace (Ta = 550°C, ta = 90 min). (2) Core made of ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s). (3) Core made of helix-like ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s).

Mentions: To check this assumption, we have compared the magnetic properties of three types of cores: (1) core made of initial ribbon and afterwards annealed in a furnace (550°C, 0.5 to 1.5 h), (2) core made of the current-heated ribbon, and (3) core made of the helix shape ribbon (the ribbon that was at first wound in tubular-like helix on a cylindrical holder and then heated by electric current; this ribbon retains its helix shape after cooling). Figure 6 shows the frequency dependencies of the initial permeability values μi (a) and core loss (b) for all three types of cores. It is seen that initial permeability values at 10 kHz, μi10, for these cores are 54,000, 5,000, and 7,000, respectively. Thus, one can conclude that the tension in the third type of core is less than in the second type that leads to the μi10 increase by 40%, which is still much lower than value μi10 = 54,000 that is characteristic of the first type of core. Similarly, the core loss can also be reduced by decreasing the tension in the core (Figure 6).Figure 6


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)

Dependencies of core loss (a) and initial magnetic permeability (b) on frequency. (1) Core annealed in furnace (Ta = 550°C, ta = 90 min). (2) Core made of ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s). (3) Core made of helix-like ribbon heated 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

Fig6: Dependencies of core loss (a) and initial magnetic permeability (b) on frequency. (1) Core annealed in furnace (Ta = 550°C, ta = 90 min). (2) Core made of ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s). (3) Core made of helix-like ribbon heated by electric current (jh = 42 A/mm2, th = 3.7 s).
Mentions: To check this assumption, we have compared the magnetic properties of three types of cores: (1) core made of initial ribbon and afterwards annealed in a furnace (550°C, 0.5 to 1.5 h), (2) core made of the current-heated ribbon, and (3) core made of the helix shape ribbon (the ribbon that was at first wound in tubular-like helix on a cylindrical holder and then heated by electric current; this ribbon retains its helix shape after cooling). Figure 6 shows the frequency dependencies of the initial permeability values μi (a) and core loss (b) for all three types of cores. It is seen that initial permeability values at 10 kHz, μi10, for these cores are 54,000, 5,000, and 7,000, respectively. Thus, one can conclude that the tension in the third type of core is less than in the second type that leads to the μi10 increase by 40%, which is still much lower than value μi10 = 54,000 that is characteristic of the first type of core. Similarly, the core loss can also be reduced by decreasing the tension in the core (Figure 6).Figure 6

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