融液よりの結晶育成過程における自然対流に対する磁場の効果

概要

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The effect of an external magnetic field on the natural convention of a melt, which is electrically conductive, has been studied in relation to the process of crystal growth. It is known that the convective flow of a melt seriously affects the quality of the crystal, and that the application of a magnetic field could be one of the most promising procedures. Both the Bridgman and the Czochralski growth processes have been modeled under the assumption that the external magnetic field is imposed vertically. The result of a numerical analysis has revealed that there is a minimum intensity of the magnetic field that is necessary to suppress the convective motion of the liquid, and that above this threshold intensity the flow velocity decreases as inversely proportional to the magnetic field squared.
社団法人日本機械学会の論文
1988-09-25