2008
DOI: 10.1088/1468-6996/9/2/024202
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Effects of a high-gradient magnetic field on the migratory behavior of primary crystal silicon in hypereutectic Al–Si alloy

Abstract: The migration of primary Si grains during the solidification of Al-18 wt%Si alloy under a high-gradient magnetic field has been investigated experimentally. It was found that under a gradient magnetic field, the primary Si grains migrated toward one end of the specimen, forming a Si-rich layer, and the thickness of the Si-rich layer increased with increasing magnetic flux density. No movement of Si grains was apparent under a magnetic field below 2.3 T. For magnetic fields above 6.6 T, however, the thickness o… Show more

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Cited by 28 publications
(21 citation statements)
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“…However, the mechanisms of how the magnetic field changes the viscosity are still unclear and the previous equation can only fit a single specific case. According to earlier research [10], the increase of the melt viscosity by the applied magnetic field can be due to the induced restriction force when the particle is moving in the melt. As represented in Fig.…”
Section: Effect Of the Magnetic Field On The Melt Viscositymentioning
confidence: 92%
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“…However, the mechanisms of how the magnetic field changes the viscosity are still unclear and the previous equation can only fit a single specific case. According to earlier research [10], the increase of the melt viscosity by the applied magnetic field can be due to the induced restriction force when the particle is moving in the melt. As represented in Fig.…”
Section: Effect Of the Magnetic Field On The Melt Viscositymentioning
confidence: 92%
“…To elucidate the strong magnetic effect on the feeble magnetic particle-particle interaction, the interaction forces were calculated by using Equations (7) to (10) and the theoretical model in [14]. As illustrated in Fig.…”
Section: Effect Of the Magnetic Field Density On The Particle-particlmentioning
confidence: 99%
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“…The high-gradient magnetic field has been widely used in high-gradient magnetic separation (e.g., beneficiation of minerals) [19,20], micro-fluidic devices [21], biomedicine research (e.g., microchip technology for cell separations [22,23] and cell manipulations [24], as well as drug delivery by nanomagnetic particles [3,4]), wastewater treatment technology [25,26], chemical research (e.g., a high gradient magnetic field that can greatly influence chemical reaction rate [27]), the new generation of materials [28] and so on. Traditionally people obtain a gradient magnetic field simply by using an active magnet, which is an active device and limited by the heat effect.…”
Section: Introductionmentioning
confidence: 99%