摘要
A self-made directional solidification setup was used to prepare high purity aluminum ingots of 100mm in diameter. The morphology of the growth interface was detected by SEM and AFM, and the grain lattice orientation was detected by XRD. The results indicate that the grains suffer competitive growth under any conditions in experiments. The lattice orientation of the preferred grains is determined by the flow field above the solid-liquid interface. The horizontal lattice position does not change during the growth process. However, the lattice orientation in the growth direction varies with the growth velocity and approaches to [100] gradually during the growth process.
A self-made directional solidification setup was used to prepare high purity aluminum ingots of 100mm in diameter. The morphology of the growth interface was detected by SEM and AFM, and the grain lattice orientation was detected by XRD. The results indicate that the grains suffer competitive growth under any conditions in experiments. The lattice orientation of the preferred grains is determined by the flow field above the solid-liquid interface. The horizontal lattice position does not change during the growth process. However, the lattice orientation in the growth direction varies with the growth velocity and approaches to [100] gradually during the growth process.
出处
《中国有色金属学会会刊：英文版》
CSCD
2006年第A03期1600-1605,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(2002AA336072) supported by the High-tech Research and Development Program of China
Project(03XD14009) supported by the Program of Shanghai Subject Chief Scientist
关键词
晶体结构
铝
凝固作用
X光线衍射
high purity aluminum
competitive growth
directional growth
lattice orientation
