研究结果表明：1 . P - RE复合变质对过共晶铝硅合金的初晶硅和共晶硅都具有良好的变质和细化作用。
The result indicated that: 1. P-RE combination modification can modify both the eutectic Si and primary Si of the hypereutectic Al-Si alloy at the same time.
研究结果表明，电脉冲处理对铝硅合金凝固组织中的共晶硅起到很好的细化和粒化作用，达到了类似化学变质的效果；
The results of the experiment show that the eutectic silicon become small and granular by electric pulse discharging, which like the effects treated with chemical modification .
由于铝离子代替了部分硅离子，其极化作用和吸水性大大增强，原位改性使超细硅酸铝的疏水性和分散性增强。
Its polarization effect and hygroscopicity are increased due to substitution of aluminium ions for silicon ions and its hydrophobic...
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