采用实时观测装置和定向凝固系统研究了SCN-Cam(Succinonitrile-wt%Camphor,wt%为质量分数)模型合金的凝固过程.实验结果表明,SCN-23.6%Cam共晶合金在常规条件下形成规则的共晶组织,共晶间距随界面推移速度的增大而减小;加入超声振动时,共晶合金生长出初生相;SCN-21%Cam亚共晶合金在超声条件下凝固时界面上形成无初生相的共晶组织;改变超声功率,SCN-21%Cam合金所形成的共晶间距随着超声功率的增大而逐渐增大.
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