用同步加速器 X 光检查成像技术,在团结的分离进化 Al-10 wt% 双性人不能混合的合金以不同的冷却的率被调查。不管冷却的率,大多数双性人溶质在团结以后出现在样品的上面的部分。为这双性人丰富现象的原因为不同的冷却的率是不同的。除 Marangoni 运动以外,积极分离,以前很少被注意了,能也做双性人溶质转移到热最高的地区。它也被发现那,水泡(或毛孔) 出现在团结水泡的 Al-10 wt% 双性人合金,和数字(或毛孔) 有冷却的增加的增加评价,当时水泡的尺寸(或毛孔) 减少。
Using synchrotron X-ray imaging technique,the segregation evolution in solidifying Al-10 wt% Bi immiscible alloys was investigated at different cooling rates.Irrespective of the cooling rate,most of the Bi solute appeared at the upper part of the sample after solidification.The reason for this Bi enrichment phenomenon is different for different cooling rates.Besides Marangoni motion,positive segregation,which has rarely been noticed before,can also make Bi solute transfer to the hot top zone.It is also found that,bubbles(or pores) appear in solidifying Al-10 wt% Bi alloys,and the number of bubbles(or pores) increases with the increase of the cooling rate,while the size of the bubbles(or pores) decreases.