In the growth process of eutectic alloy, silicon phase branches mainly ia the preferred orientation, just with a few defects.

共晶团生长过程中，硅相的分枝机制主要表现为择优生长方向的分枝，而缺陷的作用是次要的。

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The experimental results indicate: The preferred orientation of the abnormal grain growth depends on the annealing temperature and atmosphere sensitively.

结果表明，晶粒异常长大的择优取向依赖于热处理温度及气氛。

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