Effect of nanoparticles on microstructure and thermophysical properties of Sn-Bi-Zn heat storage alloys

WANG Qingmeng; CHENG Xiaomin; WANG Xiuli; CHENG Qianju; YANG Yi

doi:10.19799/j.cnki.2095-4239.2025.1091

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Effect of nanoparticles on microstructure and thermophysical properties of Sn-Bi-Zn heat storage alloys

Energy Storage Materials and Devices | 更新时间：2026-07-13

- Effect of nanoparticles on microstructure and thermophysical properties of Sn-Bi-Zn heat storage alloys
- Energy Storage Science and Technology Vol. 15, Issue 6, Pages: 2058-2067(2026)
- 作者机构：
  
  1.黄冈师范学院机电与智能制造学院，湖北黄冈 438000
  2.武汉理工大学材料科学与工程学院，湖北武汉 430070
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2025.1091
  CLC： TK 02
- Received：08 December 2025，
  
  Revised：2025-12-26，
  
  Published：28 June 2026
- 稿件说明：
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王青萌, 程晓敏, 王秀丽, 等. 纳米颗粒对Sn-Bi-Zn储热合金显微组织及热物理性能的影响[J]. 储能科学与技术, 2026, 15(6): 2058-2067.

WANG Qingmeng, CHENG Xiaomin, WANG Xiuli, et al. Effect of nanoparticles on microstructure and thermophysical properties of Sn-Bi-Zn heat storage alloys[J]. Energy Storage Science and Technology, 2026, 15(6): 2058-2067.
王青萌, 程晓敏, 王秀丽, 等. 纳米颗粒对Sn-Bi-Zn储热合金显微组织及热物理性能的影响[J]. 储能科学与技术, 2026, 15(6): 2058-2067. DOI： 10.19799/j.cnki.2095-4239.2025.1091.

WANG Qingmeng, CHENG Xiaomin, WANG Xiuli, et al. Effect of nanoparticles on microstructure and thermophysical properties of Sn-Bi-Zn heat storage alloys[J]. Energy Storage Science and Technology, 2026, 15(6): 2058-2067. DOI： 10.19799/j.cnki.2095-4239.2025.1091.

摘要

比热容对材料的传热效率起着至关重要的影响。本研究重点探究与基体合金密度相近的第二相纳米氧化钐（Sm

）、纳米碳化钨（WC）以及纳米镍（Ni）颗粒对合金基体显微组织及热物理性能的影响。采用X射线衍射相分析（XRD）、电子探针显微形貌分析（EPMA）和X射线荧光光谱（XRF）等方法，对合金的物相组成与显微结构进行了表征；同时，运用差示扫描量热仪（DSC）和激光闪射法（LFA），对合金的热物理性能展开了全面分析。研究结果表明，第二相纳米颗粒的添加改变了共晶相的形貌，并在复合合金中诱导形成了超细晶粒，改变了合金中电子和声子传热的贡献比例。在液态状态下，第二相固体纳米颗粒与熔融金属之间会形成有序结构。随着温度升高，破坏这些有序结构需要额外吸收热量，进而导致比热容增大。

Abstract

Specific heat capacity plays a crucial role in the heat transfer efficiency of materials. This study focuses on exploring the effects of second-phase nano samarium oxide

nano tungsten carbide

and nano nickel particles with densities similar to that of the alloy matrix on the microstructure and thermophysical properties of the alloy matrix. The phase composition and microstructure of the alloy were characterized using methods such as X-ray diffraction phase analysis

electron probe microanalysis

and X-ray fluorescence spectroscopy. The thermal and physical properties of the alloy were comprehensively analyzed using differential scanning calorimetry and laser flash analysis. The results indicate that the addition of second-phase nanoparticles changes the morphology of the eutectic phase and induces the formation of ultrafine grains in the composite alloy

altering the contribution ratio of electron and phonon heat transfer in the alloy. In the liquid state

an ordered structure is formed between the second-phase solid nanoparticles and the molten metal. As the temperature increases

breaking these ordered structures requires additional heat absorption

which increases the specific heat capacity.

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references

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