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中文摘要：
研究了梯度磁场对纯Al在强磁场和交流电复合所产生的电磁振荡下凝固组织的影响规律．在不同的梯度磁场中，施加电磁振荡凝固后纵截面细化组织分布发生很大变化，并建立模型进行了分析．结果表明，初生晶核在梯度磁场中所受有效磁悬浮力影响了细化组织分布规律．利用梯度磁场效应，可以控制凝固过程中的“结晶雨”现象和模拟微重力凝固．
英文摘要：
The effect of gradient high magnetic field on the structure refinement of pure Al has been investigated experimentally. It was found that during electromagnetic vibration the refining region was influenced by the magnetization force and gravity. A model responsible for the magnetization force-restrain migratation of crystal grains has been proposed based on the classical dynamics, in which the grain is treated as a spheroid. A theoretical expression was derived for the migratation of grain as a function of applied magnetic intensity and gradient. The micro-gravitational solidification and restraint of ＂ crystal shower ＂ can be realized under gradient high magnetic field.
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