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利用 ＣＷ ＣＯ_２激光器对 Ｃｕ—２７．３％Ｍｎ进行了系列表面熔凝实验，对该合金的组织形态和胞晶间距选择规律进行了研 究结果表明：随着生长速度的提高，组织形态由低速平界面向细胞晶和高速绝对稳定平界面转变在快速凝固条件下．Ｃｕ—Ｍｎ合＆ 的胞晶间距存在一个较大的选择范围，最大、最小和平均胞晶间距与生长速度的关系分别为 λｍａｘ＝４．８８ｖｓ~０．２６， λｍｉｎ=２．３５ｖｓ~０．２２和 λ＝ ３．６６ｖｓ~０．２５实验结果与 ＫＧＴ模型吻合
A series of surface melting experiments on Cu-27.3% Mn were carried out by using CW CO_2 laser. The morphology of the alloy and the rule of the choice of cell spacing were studied. The results showed that with the increase of growth rate, The interface towards the cellular crystal and the high-speed absolute stable planar interface transition under rapid solidification conditions. There is a large range of cell spacing between Cu-Mn and Cu, and the relationship between the maximum, minimum and average cell spacing and growth rate are λmax = 4.88vs ~ 0.26 and λmin = 2.35vs ~ 0, respectively. 22 and λ = 3.66 vs ~ 0.25 The experimental results are consistent with the KGT model