Experimental Determination of Solid-Liquid Interfacial Energy for Zn Solid Solution in Equilibrium with the Zn-Al Eutectic Liquid

摘要

The equilibrated grain boundary groove shapes for the Zn solid solution in equilibrium with the Zn-Al eutectic liquid were observed by rapid quenching. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient and the solid-liquid interfacial energy for the Zn solid solution in equilibrium with the Zn-Al eutectic liquid have been determined to be (5.80 + - 0.18) X 10~(-8) Km and (93.496 + - 7.57) X 10~(-3) Jm~(-2) with the numerical method and from the Gibbs-Thomson equation, respectively. The grain boundary energy for the same material has been calculated to be (182.302 + - 18.23) X 10~(-3) Jm~(-2) from the observed grain boundary groove shapes. The thermal conductivities of the solid and liquid phases for Zn-5 wt pet Al and Zn-0.5 wt pet Al alloys have also been measured.