摘要
利用自行研制的电磁泵驱动液流定向凝固装置 ,首次成功地发现了Al- 4.5Cu合金柱状晶的穗状晶生长区域并观察到其形态 .研究发现 :穗状晶生长区域位于液流速度v >4.5cm/s,柱状晶的生长速度R为 2 0~ 80 μm/s的局部范围内 .在该区域中 ,近胞状生长区域晶体呈典型穗状迎流生长 ;近枝晶生长区域晶体近垂直生长 。
In a directional solidification instrument developed in our lab . With an electromagnetic pump , at given cooling condition, the first discovery of spike-like crystals growth interface morphology and formative conditions of Al-4.5Cu alloy has been made . Results indicate that the conditions of spike-like crystals growth are the flow velocity v>4.5 cm/s and the growth velocity 20 μm/s<R<80 μm/s . In this area , when the growth velocity is high, the crystal grows vertically bounch-like crystal ; when the growth velocity is low, the crystal grows upstream classic spike-like crystal.
出处
《昆明理工大学学报(理工版)》
2000年第4期32-35,共4页
Journal of Kunming University of Science and Technology(Natural Science Edition)