%0 Journal Article
%T The formation mechanism of band-like microstructures in directionally solidified Cu-1.0%Cr hypoeutectic alloy<br>定向凝固Cu-1.0%Cr合金中带状组织及其形成机制
%A LI Xiao-Li
%A <br>李晓历
%A 李金山
%A 胡锐
%A 寇宏超
%A 傅恒志
%J 金属学报
%D 2007
%I 
%X Band-like microstructures were observed in directionally solidified Cu-1.0%Cr hypoeutectic alloy at the growth rate ranging from 2 m/s to 10 m/s and the temperature gradient of 200K/cm in liquid. There are three kinds of band-like microstructures, which are the planar interface plus coupled eutectic, the planar interface plus cellular structure with the growth of coupled eutectic, and cellular interface structure plus coupled eutectic, respectively. The formation mechanism of band-like microstructures has been illustrated by discussing the solute distribution ahead of solid-liquid interface in which the growth rate and alloy composition are changed at the non-steady state in directional solidification. In addition, the density difference between Cu phase and Cr phase is also an available factor to cause the formation of band-like microstructures in directionally solidified Cu-1.0%Cr hypoeutectic alloy.
%K directional solidification
%K Cu-1
%K 0%Cr hypoeutectic alloy
%K band-like microstructure
%K solute distribution<br>定向凝固
%K Cu-1.0％Cr亚共晶合金
%K 带状组织
%K 溶质分布
%K 定向凝固
%K 合金成分
%K 带状组织
%K 形成机制
%K FORMATION
%K MECHANISM
%K MICROSTRUCTURES
%K 共晶组织
%K 相成分
%K 变化
%K 稳态
%K 溶质分布
%K 凝固界面
%K 理论
%K 实验
%K 胞间
%K 胞晶
%K 单相
%K 存在
%K 凝固组织
%K 共晶合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=E86F46BE67EA87F26B90C3D011FF7E32&yid=A732AF04DDA03BB3&vid=BE33CC7147FEFCA4&iid=59906B3B2830C2C5&sid=CDE97535A1E7BEA0&eid=DC165160277F7BE9&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=16