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Experimental Determination of Interfacial Energy for Solid Zn Solution in the Sn-Zn Eutectic System
Fatma Meydaneri,Mehtap Payveren,Buket Saatçi,Mehmet Özdemir,Necmettin Marasli 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.1
The grain boundary groove shapes for Zn solid solution in equilibrium with Sn-Zn eutectic liquid were observed with a radial heat flow apparatus. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient, the solid-liquid and the grain boundary energy for the Zn solid solution in equilibrium with Sn-Zn eutectic liquid were determined to be (2.32 ± 0.13)×10−8Km, (120.87 ± 13.29)×10−3J.m−2and (194.76± 23.37)×10−3J.m−2, respectively. The termal conductivity of the eutectic Sn- 9 wt% Zn solid solution, κS,was obtained as 74.74 W/Km by using a radial heat flow apparatus. The thermal conductivity ratio of the eutectic liquid to the eutectic solid, R = κL/κS was found to be 0.58 with a Bridgman-type directional growth apparatus. Thus, the value of the thermal conductivity of eutectic Sn- 9 wt% Zn liquid solution, κL, was obtained as 43.82 W/Km.