Because of the lower density of the rejected solute during the horizontal solidification of NH4C1-70%H2O, channels grow slantways and upwards and A type segregates form in the upper region of mush.

• H2O侧向凝固时；析出的溶质密度较小；偏析通道倾斜向上生长；在糊状区上部形成A偏析.