Study on Properties and Heat Treatment Process of Fe75.9Cu1Si13B8Nb1.5Mo0.5Dy0.1

The soft magnetic properties of Fe[Formula: see text]Cu1Si[Formula: see text]B8Nb[Formula: see text]Mo[Formula: see text]Dy[Formula: see text] nanocrystalline alloy were studied which is designed on the basis of the Finemet type alloys. The X-ray diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), electric inductance measuring-testing instrument and MATS soft magnetic material AC/DC tester were used to study the effects of the effective permeability ([Formula: see text], saturation magnetic induction ([Formula: see text]), coercivity ([Formula: see text]), and hysteresis losses ([Formula: see text]) at 100[Formula: see text]kHz and 0.2[Formula: see text]T under factors such as different annealing temperatures, different thicknesses, and whether there is a need for transverse field for annealing. The results show that the commercial amorphous alloy ribbons Fe[Formula: see text] Cu1Si[Formula: see text]B8Nb[Formula: see text]Mo[Formula: see text]Dy[Formula: see text] have complete amorphous structure in as-cast state, and [Formula: see text]-Fe nanocrystalline phase precipitates on the amorphous matrix after vacuum annealing. Fe[Formula: see text] Cu1Si[Formula: see text]B8Nb[Formula: see text]Mo[Formula: see text]Dy[Formula: see text] alloy has high [Formula: see text] value and good thermal stability, which can better control the formation of nanocrystalline structure. The transverse magnetic field annealing can greatly increase the [Formula: see text] of the material and reduce the [Formula: see text], which is more significant for the ribbons. The optimum annealing process of Fe[Formula: see text]Cu1Si[Formula: see text]B8Nb[Formula: see text]Mo[Formula: see text]Dy[Formula: see text] alloy is that the transverse magnetic field of 1000[Formula: see text]Gs is applied and the temperature is kept at 833[Formula: see text]k for 30[Formula: see text]min. And the best properties for [Formula: see text] are 1.39[Formula: see text]T, for [Formula: see text] is 4.6[Formula: see text]A/m and [Formula: see text]@1[Formula: see text]kHz, [Formula: see text]@100[Formula: see text]kHz. With the high frequency and miniaturization of electronic components, this material has potential application value.

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Flat liquid metal jet affected by a transverse magnetic field

Magnetohydrodynamics ◽

10.22364/mhd.57.2.6 ◽

2021 ◽

Vol 57 (2) ◽

pp. 211-222

Keyword(s):

Magnetic Field ◽

Liquid Metal ◽

Transverse Magnetic Field ◽

Flow Characteristics ◽

Transverse Field ◽

Streamwise Velocity ◽

Transverse Magnetic ◽

Mean Flow ◽

Square Duct ◽

Oriented Parallel

A liquid metal flat jet immersed in a square duct under the influence of a transverse magnetic field is studied experimentally. Two cases are considered: when the applied magnetic field is oriented parallel (coplanar field) or perpendicularly (transverse field) to the initial plane of the jet. The main goal of the study is to investigate the mean flow characteristics and the stages of the jet's transformation. Signals of streamwise velocity at different locations are measured, which allows us to determine average velocity profiles and spatial-temporal characteristics of the velocity field. The two considered configurations are directly compared under the same flow regimes, with the same equipment. Figs 8, Refs 11.

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Magnetic Shielding in Hollow Iron Cylinders

Proceedings of the Royal Society of Edinburgh ◽

10.1017/s0370164600007744 ◽

1904 ◽

Vol 24 ◽

pp. 94-96

Author(s):

James Russell

Keyword(s):

Magnetic Field ◽

Coercive Force ◽

Transverse Magnetic Field ◽

Transverse Field ◽

Transverse Magnetic ◽

Internal Magnetic Field ◽

Magnetic Shielding ◽

Geometrical Data ◽

The Subject ◽

Minus Unity

AbstractThis investigation deals with the shielding which exists within hollow iron cylinders when placed in a uniform transverse magnetic field. This transverse field divided by the internal magnetic field is defined as the shielding ratio. For the thin iron cylinders experimented with, it appears from various mathematical contributions to the subject that the shielding ratio minus unity may for present purposes be taken to be proportional to certain geometrical data and to the permeability (the permeability being large). By means of a rotating inductor within the shield, connected with a ballistic galvanometer, experimental determinations of the shielding ratio are made under various conditions of magnetisation; and an endeavour is also made to show how far and under what conditions these results approximate to theoretical formulas which assume the permeability to be uniform all round the shield, and the absence of retentivity and coercive force in the iron. Two iron shields were experimented with, the hysteretic constants (η) being ·0015 and ·0028 respectively.

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A Sufficient Condition for Krall’s Criterion and its Modifications

International Astronomical Union Colloquium ◽

10.1017/s0252921100029572 ◽

1993 ◽

Vol 141 ◽

pp. 439-442 ◽

Cited By ~ 1

Author(s):

Wu Linxiang

Keyword(s):

Magnetic Field ◽

Transverse Magnetic Field ◽

Free Field ◽

Transverse Field ◽

Transverse Magnetic ◽

Sufficient Condition ◽

Longitudinal Field ◽

Convex Upward ◽

Force Free Field ◽

Lines Of Force

AbstractIn order to determine the sense of the photospheric transverse magnetic field measured with a magnetograph, it is shown that: (1) If the magnetic lines of force through the photospheric plane are both divergent and convex upward, Krall’s criterionis true for the transverse field B⊥ much more strongly than for the longitudinal field Bz and the inequality in general becomes(2) If the magnetic lines of force are only divergent upward, we have instead the inequalityfor a force-free field.

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