Thermal Properties and Microstructure Evolution of the as‑cast and Annealed Al–Cu–Si Eutectic Alloy

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dc.citation.rankM21
dc.citation.spage149
dc.citation.volume46
dc.contributor.authorManasijević, Dragan
dc.contributor.authorMarković, Ivana
dc.contributor.authorCimpoesu, Nicanor
dc.contributor.authorChelariu, Romeu
dc.contributor.authorStamenković, Uroš
dc.contributor.authorBalanović, Ljubiša
dc.contributor.authorGorgievski, Milan
dc.date.accessioned2025-09-01T08:50:15Z
dc.date.available2025-09-01T08:50:15Z
dc.date.issued2025
dc.description.abstractThe Al–28%Cu–6%Si (mass%) eutectic alloy represents a possible high-temperature phase change material (PCM) for latent heat thermal energy storage (LHTES). In this paper, its microstructural characteristics and thermal properties were examined in the as-cast and annealed conditions using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), differential scanning calorimetry (DSC), and light flash method. The microstructure of the studied alloy consists of (Al) solid solution phase, θ-Al2Cu intermetallic phase, and (Si) phase. The annealing at 450°C for 50 h led to significant changes in the morphology of the θ-Al2Cu and (Si) eutectic phases. The temperature dependences of thermal diffusivity and thermal conductivity were investigated within the temperature range from 25 to 400 °C. It was found that the thermal diffusivity and thermal conductivity of the annealed alloy are considerably higher than that of the as-cast alloy at temperatures lower than 300 °C. With increasing temperature, due to changes in the microstructure of the as-cast alloy, these differences decrease and finally diminish at 400 °C. The measured eutectic temperature is 522.3 °C and latent heat of melting is 358.3 Jg-1. The findings suggest that the Al–Cu–Si eutectic alloy shows good potential for use in phase change energy storage technologies.
dc.identifier.doi10.1007/s10765-025-03623-4
dc.identifier.issn0195-928X
dc.identifier.issn1572-9567
dc.identifier.urihttps://repozitorijum.tfbor.bg.ac.rs/handle/123456789/5998
dc.language.isoen
dc.publisherSpringer Nature
dc.rights.licenseARR
dc.rights.uriAll rights reserved
dc.sourceInternational Journal of Thermophysics
dc.subjectAluminum alloys
dc.subjectEutectic
dc.subjectLatent heat
dc.subjectPhase change materials
dc.subjectThermal conductivity
dc.titleThermal Properties and Microstructure Evolution of the as‑cast and Annealed Al–Cu–Si Eutectic Alloy
dc.typearticle
dc.type.versionpublishedVersion

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