Home Metallic Materials - Kovové materiály 2019 Metallic Materials Vol. 57 (2019), no. 4, pp.267–273

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Metallic Materials Vol. 57 (2019), no. 4, pp.267–273

Title: Investigation of latent heat of melting and thermal conductivity of the low-melting Bi-Sn-Zn eutectic alloy
Author: I. Manasijevic , Lj. Balanovic, D. Minic, M. Gorgievski, U. Stamenkovic

Abstract: Low-melting eutectic alloys represent promising candidates for production of phase change
materials (PCMs). PCMs are widely used in the field of thermal energy storage (TES). The
most important advantages of the low-melting metallic materials as PCMs are their high volumetric
latent heat and high thermal conductivity. However, essential thermophysical properties
such as melting point, latent heat of fusion, specific heat capacity, thermal conductivity, and
surface tension for many low-melting eutectic alloys are still unknown.
In this study, melting temperature, latent heat of melting and thermal conductivity of
the Bi-Sn-Zn eutectic alloy were experimentally investigated. Melting temperature and latent
heat of melting were determined by using differential scanning calorimetry (DSC) and compared
with the results of thermodynamic calculation according to CALPHAD (calculation of
phase diagram) method. Thermal diffusivity of the investigated eutectic alloy at 25◦C was
measured by using the xenon-flash method. Based on the experimentally determined thermal
diffusivity and the specific heat capacity obtained by thermodynamic calculation, the thermal
conductivity of the investigated eutectic alloy was determined to be 22.88 ± 1.83Wm−1 K−1.
In addition, the microstructure of the investigated eutectic alloy was examined using scanning
electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS).

Keywords: Bi-Sn-Zn system, eutectic alloy, latent heat of melting, thermal conductivity
Published online: 25-Jun-2019
Year: 2019, Volume: 57, Issue: 4 Page From: 267, Page To: 273
doi:10.4149/km_2019_4_267


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