%0 Journal Article
%T EFFECT OF LIQUID FLOW ON PRIMARY ARM SPACING OF CONSTRAINED COLUMNAR CRYSTALS
%A LIU Shan LU Deyang HUANG Tao ZHOU Yaohe National Lab of Solidification Processing
%A Northwestern Polytechnical University
%A Xi''an
%A China LIU Shan
%A lecturer
%A National Laboratory of Solidification Processing
%A Northwestern Polytechnical University
%A Xi''an
%A China
%A <br>LIU Shan LU Deyang HUANG Tao ZHOU Yaohe National Lab of Solidification Processing
%A Northwestern Polytechnical University
%A Xi''''an
%A China LIU Shan
%A lecturer
%A National Laboratory of Solidification Processing
%A Northwestern Polytechnical University
%A Xi''''an
%A China
%J 金属学报(英文版)
%D 1993
%I 
%X An experimental apparatus,which has a convection generator and an aid-heater,is developed for the study of the effect of stable laminar liquid flow on the directional solidification process by the use of transparent alloy SCN-2wt-% Ace.The flow is perpendicular to primary arms. By in-situ observation and photographing at different specific moments,it has been found that such a flow can cause a great change in primary spacings of constrained columnar crystals:for cells,the spacings become smaller;but for dendrites,they become larger.The former is mainly due to the tilted growth of upstreamside branches,while the latter is mainly due to the coup- ling effect of liquid flow with solutal field around dendrite tips.The faster the liquid flows,the further smaller the cell spacing and the further larger the dendrite spacing.
%K forced liquid flow
%K directional solidification
%K dendrite spacing
%K cell spacing<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=71FF45C46C43C074BADDC85B89A7AFBD&yid=D418FDC97F7C2EBA&vid=B31275AF3241DB2D&iid=94C357A881DFC066&sid=CA9ED1AB4D9E3E04&eid=86C0C9A759FDA8CA&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=7