超重力对铅锡共晶凝固组织的影响  

THE EFFECT OF EXTRAGRMITY ON THE SOLIDIFICATION MORPHOLOGY OF Pb-Sn EUTECTIC

作　　者：赵志龙[1] 鲁德洋[1] 裴崇斌[1] 

机构地区：[1]西北工业大学,西安市710072

出　　处：《材料研究学报》1998年第4期395-398,共4页Chinese Journal of Materials Research

摘　　要：采用臂长为1．3m的离心机实现1、5、10、15g（1g=9．8m·s-2）四个重力水平；利用Bridgman法使Ph－Sn共晶单向凝固，以观察重力对凝固组织的影响结果表明，随重力水平的提高，共晶晶团尺寸减小，而共晶相间距不变。A centrifuge with of radius 1.3m is used to achieve four gravity levels (1g, 5g, 10g and 15g, 1g=9.8m.s-2). For observing and analyzing the difference of solidification morphology in various gravity levels, the eutectic Pb-Sn is directionaIly solidified in high gravity using Bridgman technique.Experimental results show that the size of eutectic cell in high-gravity is smaller than that of 1g, and that the Pb-Sn eutectic interphase spacing at the various gravity levels has little partial difference,which indicate that the buoyancy convection don't influent the exchange of solute between the eutectic phases.

关 键 词：超重力 浮力对流 共晶相间距 铅锡合金 凝固组织 

分 类 号：TG146.12[一般工业技术—材料科学与工程]