Microstructure evolution of directionally solidifi ed Sn-16%Sb hyperperitectic alloy

查看全文 作　　者：Hu Xiaowu Li Shuangming Liu Lin Fu [1]Hengzhi

机构地区：[1]State Key Laboratory of Solidification Processes, Northwestern Polytechnic University, Xi'an 710072, Shaanxi, China

出　　处：《China Foundry》索引2008年第5卷第3期,共5页

摘　　要：The directionally solidifi ed microstructure of Sn-16%Sb hyperperitectic alloy has been investigated at various solidifi cation rates using a high-thermal gradient directional solidif ication apparatus. The results indicate that the solidifi cation microstructure consists of hard primary intermetallic SnSb phase embedded in a matrix of soft peritectic β-Sn phase. The primary SnSb phase exhibits faceted growth with tetragonal or trigonal shapes. At the same time, the primary SnSb phase is ref ined with an increase in the solidif ication rate and dispersed more uniformly in the matrix of β-Sn phase. The volume fraction of the SnSb phase fi rstly decreases and then increases when the solidif ication rate increases in directional solidif ication of Sn-16%Sb hyperperitectic alloy. 关键词：锡锑合金凝固初始相位形态

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Microstructure evolution of directionally solidifi ed Sn-16%Sb hyperperitectic alloy

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