Levitation of metallic melt by using the simultaneous imposition of the alternating and the static magnetic fields

Yasuda, Hideyuki; Ohnaka, Itsuo; Ninomiya, Yuki; Ishii, Rintaro; Fujita, Satoru; Kishio, K.

doi:10.1016/j.jcrysgro.2003.08.072

Cited by 82 publications

(50 citation statements)

References 21 publications

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“…Here we focus our attention onto the effect of the static magnetic fields. As is shown elsewhere [29], forced convection in the electromagnetically levitated samples can be damped effectively by imposing a static magnetic field of 0.5 T or above. This damping is expected to be also effective on forced convection in the present sample.…”

Section: Dendritic Growth Velocities Of Pure Nickel Under Forced Convmentioning

confidence: 88%

Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection

et al. 2016

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Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields up to 6 T were measured using a high-speed camera. The growth velocities for undercoolings below 120 K are depressed under low magnetic fields, but are recovered progressively under high magnetic fields. This retrograde behavior arises from two competing kinds of magnetohydrodynamics in the melt and becomes indistinguishable for higher undercoolings. The measured data is used for testing of a recent theory of dendritic growth with convection. A reasonable agreement is attained by assuming magnetic field-dependent flow velocities. As is shown, the theory can 2 also account for previous data of dendritic growth kinetics in pure succinonitrile under normal gravity and microgravity conditions. These tests demonstrate the efficiency of the theory which provides a realistic description of dendritic growth kinetics of pure substances with convection.

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Section: Dendritic Growth Velocities Of Pure Nickel Under Forced Convmentioning

confidence: 88%

Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection

et al. 2016

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“…10,11) Fukuyama et al 12) developed an experimental technique using electromagnetic levitation (EML) coupled with a static magnetic field for non-contact measurement of thermophysical properties of high-temperature melts. Since a static magnetic field of the order of several tesla can suppress surface oscillations and translational motions of a liquid droplet levitated electromagnetically, 13) this technique enables us to obtain accurate values of thermophysical properties such as thermal conductivity, heat capacity, [14][15][16][17] spectral emissivity, 16,17) surface tension, 18) and density. [19][20][21] Several reports have been published on the liquid density of the above-mentioned silicon alloys, [19][20][21][22][23][24] yet the range of composition covered is still inadequate to perform a systematic study and there is some remaining uncertainty concerning the absolute value and its temperature dependence.…”

Section: Introductionmentioning

confidence: 99%

Concentration Dependence of Molar Volume of Binary Si Alloys in Liquid State

Mizuno¹,

Kawauchi²,

Tanno³

et al. 2014

ISIJ Int.

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The molar volumes of binary M-Si (M=Fe, Ni, and Ge) alloys in a liquid state were obtained from their densities measured using electromagnetic levitation coupled with a static magnetic field. We have systematically analyzed the molar volume as a function of composition. Although the concentration dependence of the molar volume of the liquid Ge-Si alloys obeys a linear law which is indicative of an ideal mixture, in comparison, that of the Ni-Si alloys shows a large discrepancy from the linear law as well as the Fe-Si system. The interaction between the constituent atoms was discussed with a view to analyzing the partial molar volume.

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“…The radial forces around the vertical axis of a magnetic field can also push a highly paramagnetic sample onto the cold crucible edge and prevent the fusion of a part of the sample. In general, the sample is melted, rapidly solidified and textured in a cold crucible or even by casting at the maximum field in a cold mold [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Texturing by cooling a metallic melt in a magnetic field

Tournier

Beaugnon

2009

Science and Technology of Advanced Materials

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Processing in a magnetic field leads to the texturing of materials along an easy-magnetization axis when a minimum anisotropy energy exists at the processing temperature; the magnetic field can be applied to a particle assembly embedded into a liquid, or to a solid at a high diffusion temperature close to the melting temperature or between the liquidus and the solidus temperatures in a region of partial melting. It has been shown in many experiments that texturing is easy to achieve in congruent and noncongruent compounds by applying the field above the melting temperature T m or above the liquidus temperature of alloys. Texturing from a melt is successful when the overheating temperature is just a few degrees above T m and fails when the processing time above T m is too long or when the overheating temperature is too high; these observations indicate the presence of unmelted crystals above T m with a size depending on these two variables that act as growth nuclei. A recent model that predicts the existence of unmelted crystals above the melting temperature is used to calculate their radius in a bismuth melt.

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Levitation of metallic melt by using the simultaneous imposition of the alternating and the static magnetic fields

Cited by 82 publications

References 21 publications

Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection

Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection

Concentration Dependence of Molar Volume of Binary Si Alloys in Liquid State

Texturing by cooling a metallic melt in a magnetic field

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