SCN-Cam共晶合金的定向凝固研究  

Study on the directional solidification of SCN-Cam eutectic alloy

作　　者：段萌萌[1] 陈长乐[1] 

机构地区：[1]西北工业大学理学院,陕西省凝聚态结构与性质重点实验室,陕西西安710072

出　　处：《功能材料》2011年第2期252-255,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50331040)

摘　　要：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。The directional solidification process of SCN-Cam（Succinonitrile-wt% camphor,wt% is as mass fraction） model alloy was studied with real-time observation devices and directional solidification system.It is indicated that SCN-23.6%Cam eutectic alloy can form the regular eutectic structure under the conventional condition.The eutectic spacing decreases with the increase of moving speed of interface;under the ultrasonic vibration condition,the eutectic alloy grows into the dendritic structure;SCN-21%Cam hypoeutectic alloy grows into the eutectic structure without primary phase in the interface.When change the ultrasonic power,eutectic spacing of SCN-21%Cam alloy increases with the increase of ultrasonic power.

关 键 词：共晶 定向凝固 超声振动 声流效应 

分 类 号：O782[理学—晶体学]