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在不同温度梯度及生长速度下测量了Ａｌ－Ａｌ３Ｎｉ共晶合金间距选择范围实验结果表明，在一定生长速度下，共晶间距存在一容许范围，其宽度随生长速度的增加而减小在某一温度梯度下，共晶间距与生长速度的关系满足常数（ｎ＝１．７－２．０）的关系．温度梯度增加，其最大、最小及平均间距略有减小同时，Ａｌ—Ａｌ３Ｎｉ合金的间距选择范围与初始生长速度无关
The range of Al-Al3Ni eutectic alloy spacing was measured under different temperature gradient and growth rate. The experimental results show that at a certain growth rate, the eutectic spacing has a permissible range, and its width decreases with the growth rate Under temperature gradient, the relationship between eutectic spacing and growth rate satisfies the relationship of constant (n = 1.7-2.0). The temperature gradient increases, while the maximum, minimum and average pitches decrease slightly. Meanwhile, the range of pitch selection of Al-Al3Ni alloy has nothing to do with the initial growth rate