分析了在旋转电磁场的作用下,Al—Si共晶合金在定向凝固时形成富Si特殊表面的过程,认为它是在次级流的作用下,一些Si颗粒被传输到坩埙壁处,并滞留下来进一步粗化而形成的。
The formation of a special Si-rich layer on the periphery of Al-si eutectic alloyspecimen during directional solidification in rotary electromagnetic field has been investigated.This layer seems due to the migration of some Si grains onto the crucible wall, then stagnatingand coarsening further.
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