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

Manasijević, Dragan; Marković, Ivana; Cimpoesu, Nicanor; Chelariu, Romeu; Stamenković, Uroš; Balanović, Ljubiša; Gorgievski, Milan

doi:10.1007/s10765-025-03623-4

Article Metadata only M21

2025

Manasijević, Dragan
Marković, Ivana
Cimpoesu, Nicanor
Chelariu, Romeu
Stamenković, Uroš
Balanović, Ljubiša
Gorgievski, Milan

Springer Nature

International Journal of Thermophysics

149

English

M21 - Paper in a top international journal

The 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.

Aluminum alloys, Eutectic, Latent heat, Phase change materials, Thermal conductivity

DOI

10.1007/s10765-025-03623-4

ISSN

0195-928X
1572-9567

URI

https://repozitorijum.tfbor.bg.ac.rs/handle/...

Scopus

OpenCitations

dc.rights.license	ARR
dc.date.accessioned	2025-09-01T08:50:15Z
dc.date.available	2025-09-01T08:50:15Z
dc.date.issued	2025
dc.identifier.issn	0195-928X
dc.identifier.issn	1572-9567
dc.identifier.doi	10.1007/s10765-025-03623-4
dc.identifier.uri	https://repozitorijum.tfbor.bg.ac.rs/handle/123456789/5998
dc.description.abstract	The 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.language.iso	en
dc.publisher	Springer Nature
dc.rights.uri	All rights reserved
dc.source	International Journal of Thermophysics
dc.subject	Aluminum alloys
dc.subject	Eutectic
dc.subject	Latent heat
dc.subject	Phase change materials
dc.subject	Thermal conductivity
dc.title	Thermal Properties and Microstructure Evolution of the as‑cast and Annealed Al–Cu–Si Eutectic Alloy
dc.type	article
dc.type.version	publishedVersion
dc.citation.volume	46
dc.creator	Manasijević, Dragan
dc.citation.spage	149
dc.citation.rank	M21
dc.creator	Marković, Ivana
dc.creator	Cimpoesu, Nicanor
dc.creator	Chelariu, Romeu
dc.creator	Stamenković, Uroš
dc.creator	Balanović, Ljubiša
dc.creator	Gorgievski, Milan


Thermal Properties and Microstructure Evolution of the as‑cast and Annealed Al–Cu–Si Eutectic Alloy	3