%0 Journal Article
%T EFFECT OF LIQUID FLOW ON PRIMARY ARM SPACINGS OF CONSTRAINED COLUMNAR CRYSTALS<br>液相流动对柱晶一次间距的影响
%A LIU Shan
%A LU Deyang
%A HUANG Tao
%A ZHOU Yaohe National Lab of Solidification Processing
%A Northwestern Polytechnical University
%A Xi''an lecturer
%A National Laboratory of Solidification Processing
%A Northwestern Polytechnical University
%A Xi''an
%A <br>刘山
%A 鲁德洋
%A 黄韬
%A 周尧和
%J 金属学报
%D 1993
%I 
%X An experimental apparatus, which has a convection generator and anaid-heater, is developed for the study of the effect of stable laminar liquid flow on thedirectional solidification process by the use of transparent alloy SCN-2wt-% Ace. The flowis perpendicular to primary arms. By,in-situ observation and photographing at different spe-cific moments, it has been found that such a flow can cause a great change in primaryspacings of constrained columnar crystals: for cells, the spacings become smaller; but fordendrites, they become larger. The former is mainly due to the tilted growth of upstreamsidebranches, while the latter is mainly due to the coupling effect of liquid flow with solutal fieldaround dendrite tips. The faster the liquid flows, the further smaller the cells space and thefurther larger the dendrites space.
%K forced liquid flow
%K directional solidification
%K dendrite spacing
%K cell spacing<br>液相强迫流动
%K 定向凝固
%K 枝晶间距
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=2C806756F09D6138AA5E3AADF94AED9D&yid=D418FDC97F7C2EBA&vid=771469D9D58C34FF&iid=E158A972A605785F&sid=CA4FD0336C81A37A&eid=B31275AF3241DB2D&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=3