Research of the Morphology and Distribution of the Primary Silicon in Al-18Si Alloy under a Gradient High Magnetic Field

Fang Wei Jin; Long Wu; Zi Jian Ai; Li Mei Qiu; Zhong Ming Ren

doi:10.4028/www.scientific.net/AMR.490-495.3432

Paper Titles

Standard Plate for Radar Absorbing Materials’ Measurement in 3 mm Band
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Research on Process of Copper-Infiltration on 304 Stainless Steel by Double Glow Plasma Technology
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Processing Maps for TC18 Titanium Alloy Deformed in α+β Region
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Researches of a Magneto-Rheological Fluid Damper with External Coil Based on Electromagnetic Finite Element Analysis
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Research of the Morphology and Distribution of the Primary Silicon in Al-18Si Alloy under a Gradient High Magnetic Field
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Preparation of Mesoporous TiO₂ Thin Films and Research on Ultraviolet Photolysis Degradation of Dioxins from MSW Ash
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Static Load Test and Analysis on Completed Deck Arch Bridge of Large-Span Reinforced Concrete
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Recognition of Partial Discharge Pulse Based on Short-Term Energy and DTW
p.3449

Preparation and Characterization of Resveratrol-Loaded Hydroxylpropyl-β-Cyclodextrin
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Research of the Morphology and Distribution of the Primary Silicon in Al-18Si Alloy under a Gradient High Magnetic Field

Abstract:

A gradient high magnetic field effected significantly the morphology and distribution of the primary silicon grains in Al-18Si alloy. Experimental studies shew that in the gradient high magnetic field the primary silicon phase grains, which are large plate-like or five-star-like in the case of solidification without magnetic field, are accumulated on the top of the specimen and refined remarkably with the morphology of polygonal or nodular shapes when the alloy solidifies from the semisolid state. In the segregated layer of the silicon, the distribution of the silicon grains is homogeneous. The size of the primary silicon grains decreases and the grain number density rises with the increase of the magnetic strength maintaining the magnetization force unchangeable. It seems that the high magnetic field influences the diffusion of silicon. Theoretical models have been proposed to explain the refining and the distribution of the silicon grains.