由于拉单晶过程中投料量较大，炉体结构复杂、造价昂贵，所以拉晶实验成本太高。
Because of the large stuff of silicon, complex structure of furnace and expensive cost, computer simulation is a best way to optimize design.
研究了不同的抽拉速率对第二代单晶高温合金dd 6凝固组织的影响。
The effect of withdrawing rate on the solidification microstructure of a single crystal superalloy DD6 was investigated.
本文介绍采用密闭热系统拉晶工艺拉制硅单晶的情况。
The drawing of single crystal silicon in a closed thermal system is described.
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