声悬浮条件下Al-Ge共晶合金中初生(Ge)相的形成与组织特征研究[EB/OL]
北京：中国科技论文在线
） 摘要： 在声悬浮与激光辐照相结合条件下实现了Al-51
6%Ge(质量分数)共晶合金的无容器快速凝固
导致了边缘区域初生(Ge)相的组织细化、固溶度扩展以及生长方式的转变
初生(Ge)相的体积分数和溶质含量均显著增大
熔体内部的液相对流和旋转是导致初生(Ge)相形成和体积分数变化的主要原因
containerless solidification of eutectic Al-51
6%Ge alloy has been carried out with an ultrasonic levitator
The rapidly solidified microstructure is composed of primary (Al) phase and two phase eutectics
Competitive nucleation between (Al) and (Ge) phases occurs and (Ge) solid solution nucleates as primary phase under ultrasonic levitation condition
The volume fraction and solute content of primary (Ge) phase increase remarkably near the sample edge
The internal convection and rotation are the main factors which dominate the formation of the (Ge) phase
Calculated results indicate that the increase of cooling rate near sample edge results in the transition of microstructure refinement, solubility extension and growth pattern of (Ge) phase
Keywords： metallic material; eutectic alloy; acoustic levitation; primary phase; rapid solidification 下载PDF阅读器 PDF全文下载： 初稿 （ 0 ） 作者简介： 王自华,男,硕士生,超声悬浮条件下金属材料的无容器凝固机制 通信联系人： 闫娜(1982-),女,副教授,金属材料的快速凝固 【收录情况】 中国科技论文在线： 王自华
Al-51
6%Ge共晶合金的凝固组织主要由二元共晶和初生(Al)枝晶组成
