研究了过共晶Al-18Si合金在稳恒强磁场中的凝固行为。实验表明,在稳恒强磁场作用下,过共晶Al-18Si合金中的初生Si发生显著偏聚。为解释初生Si的偏聚机理,建立了相应的量子理论模型。模型认为:初生Si在Al-18Si合金中的偏聚是由于部分Si原子在磁场中获得附加能后,沿磁场方向做旋进运动所致。Si原子在10T磁场中获得的附加能为1.854×10^-22J。

The solidification behavior of hypereutectic Al-18Si alloy was researched in a homogeneous high magnetic field. The experiment results showed that segregation of the primary silicon crystal in hypereutectic Al-18Si alloys was remarkable under a high magnetic field. In order to explain the segregation mechanism of primary silicon, a model of quantum theory was established. The model demonstrated that some silicon atoms, after getting additional energy in the magnetic field,was made a spiral movement along the magnetic field direction, this resulted in the segregation of primary silicon crystal in Al-18Si alloy. Additional energy obtained by silicon atom was 1.854×10^-22J in 10T magnetic field.