%0 Journal Article
%T NUCLEATING MECHANISM OF FIVE PETAL STAR-SHAPED PRIMARY SILICON<br>五瓣星状初晶硅形核机制
%A GUI Manchang
%A <br>桂满昌
%A 贾均
%A 李庆春
%J 金属学报
%D 1996
%I 
%X Five petal star-shaped primary silicon in hypereutectic Al-Si alloy possesses a nucleating characteristic by agglomerating from tiny polyhedron clasters with simple shape.From the veiwpoint of thermodynamics, it is a spontaneous process that the five fine tetrahedron or octahedron clasters agglomerate in a way of fivefold twinning. The agglomerated polyhedron may grow into a five petal star-shaped primary silicon. By combining clasters with smaller size than that of critical nucleation, the polyhedron can acts as a stable nucleus of primary silicon.
%K Al-Si alloy
%K primary silicon
%K nucleation
%K agglomeration<br>初晶硅
%K 形核
%K 凝并
%K 铝硅合金
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=F64C9D7CF10F3175BBDD7EC0FECAD567&yid=8A15F8B0AA0E5323&vid=9971A5E270697F23&iid=708DD6B15D2464E8&sid=A60ED5C9472B8BEB&eid=05FAA4D00F9315BD&journal_id=0412-1961&journal_name=金属学报&referenced_num=7&reference_num=2