Experimental determination of interfacial energy for solid Sn in the Sn-Ag alloy by using radial heat flow type solidification apparatus

摘要

The equilibrated grain boundary groove shapes for solid Sn in equilibrium with the (Sn-3.84 at.% Ag) eutectic liquid were observed from a quenched sample at the eutectic temperature for about 18 days with a radial heat flow apparatus. This is the first time that the equilibrated grain boundary groove shapes of solid Sn in equilibrium with the (Sn-3.84 at.% Ag) eutectic liquid have been observed using radial heat flow apparatus. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient, the solid-liquid interfacial energy and grain boundary energy for solid Sn in equilibrium with the (Sn-3.84 at.% Ag) eutectic liquid were determined to be (8.54±0.42)×10r~(-8)Km, (113.32±11.33)mJ/m~2and (216.11 ±23.77)mJ/m~2, respectively.