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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.
Fatma Meydaneri,Mehmet Gündüz,Mehmet Özdemir,Buket Saatçi 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.1
The variations of thermal conductivities of solid phases versus temperature for pure Sn and Sn-1 wt% Mg,Sn-2 wt% Mg, and Sn-6 wt% Mg binary alloys were measured with a radial heat flow apparatus. Thermal conductivity variations versus temperature for pure Sn and Sn-1 wt% Mg, Sn-2 wt% Mg, and Sn-6 wt% Mg binary alloys were found to be 60.60 ± 3.63, 61.99 ± 3.71, 68.29 ± 4.09, and 82.04 ± 4.92 W/Km, respectively. The thermal conductivity ratios of liquid phase to solid phase for pure Sn and eutectic Sn-2 wt% Mg alloy at their melting temperature were found to be 1.11 and 1.08, respectively, with a Bridgman type directional solidification apparatus. Thus the thermal conductivities of liquid phases for pure Sn and eutectic Sn-2 wt%Mg binary alloy at their melting temperature were evaluated to be 67.26 ± 4.03 and 73.75 ± 4.42 W/Km,respectively, by using the values of solid phase thermal conductivities and the thermal conductivity ratios of the liquid phase to the solid phase.