Microstructures and thermal properties of mono-sized AlSi particles prepared by pulsated orifice ejection method

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-03-01 Epub Date: 2025-01-28 DOI:10.1016/j.matchar.2025.114774

Yunxiu Lian, Wei Dong, Fumin Xu

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Abstract

Metallic materials for energy storage offer promising prospects for elevating energy conservation and efficiency. In this study, we successfully synthesized the AlSi alloy particles with different silicon contents as metallic phase-change materials for high-temperature thermal energy storage by pulsated orifice ejection method (POEM). These particles were crucial to enhancing thermal storage performance, due to their smooth and dense surfaces, narrow particle size distributions, high sphericities, high purities, and uniform and fine-grained microstructures. They exhibited excellent thermal stability, high thermal conductivity, and high latent heat capacity. The melting enthalpy of the particles could reach a maximum of 505.41 J·g⁻¹. And the corresponding solidification enthalpy was 519.18 J·g⁻¹. Notably, the particles maintained high energy storage density and strong structural stability over multiple thermal cycles. The POEM-prepared particles demonstrate a significant potential in the field of phase-change energy storage, thus leading to substantial advantages in practical applications.

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脉冲孔喷射法制备单尺寸AlSi颗粒的显微结构和热性能

金属储能材料在提高节能和能效方面具有广阔的应用前景。在本研究中，我们成功地用脉冲孔喷射法（POEM）合成了不同硅含量的AlSi合金颗粒作为高温储热的金属相变材料。这些颗粒具有光滑致密的表面、狭窄的粒径分布、高球形度、高纯度和均匀细粒的微观结构，对提高储热性能至关重要。它们表现出优异的热稳定性、高导热性和高潜热容。颗粒的熔化焓最大可达505.41 J·g−1。凝固焓为519.18 J·g−1。值得注意的是，在多次热循环中，粒子保持了较高的能量储存密度和较强的结构稳定性。poem制备的粒子在相变储能领域显示出巨大的潜力，因此在实际应用中具有很大的优势。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.