摘要
通过在生长界面前区域创生液相流动,研究了在稀薄合金中对流对强制性枝晶生长的作用。本文首次报告了对流对强制性枝晶生长的影响。SCN—Acc.模型合金中的定量实验表明,枝晶生长的动力学和形态是温度梯度、生长速度和枝晶端前沿液体流动速度的函数。作为以地面为基础的实验研究,将有助于理解太空凝固试验的结果。
Model experiments on fluid flow and pattern selection havebeen done by creating flow in liquid region close to the growth fronts indendritic growth of SCN-aceton dilute alloys.The kinetics and morphologyof dendritic growth were measured as a function of thermal gradient,growth velocity and flow velocity.The present paper provides the firststudy of convection effects on constrained dendritic and cellular growthwhich focuses on the tip morphology and develops a boundary layeranalysis.All of the problems addressed have application to the interpreta-tion of the experimental phenomena arising from solodification and fiuiddynamics on earth and space laboratory.
出处
《中国空间科学技术》
EI
CSCD
北大核心
1989年第1期7-12,共6页
Chinese Space Science and Technology
基金
国家自然科学基金资助课题
关键词
晶体生长
形态学
对流效应
Convection
Morphology
Crystal growth.
