Microstructure and phase transition kinetics of Mg–Ni–Zn alloy phase change thermal storage materials
| Autor: | Yuanyuan Li, Haixue Chen, Jiangjun Li, Xiaomin Cheng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Phase transition
Materials science Mechanical Engineering Alloy Metals and Alloys Thermodynamics 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Thermal energy storage Microstructure 01 natural sciences 0104 chemical sciences Thermal conductivity Mechanics of Materials Latent heat Materials Chemistry engineering 0210 nano-technology Thermal analysis Eutectic system |
| Zdroj: | Journal of Alloys and Compounds. 829:154574 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2020.154574 |
| Popis: | Metal and alloy heat storage materials are popular in energy storage fields due to their excellent thermal conductivity and high latent heat value. In this research, by changing the ratio to optimize Mg–Ni–Zn alloys, we study the microstructure and thermal properties of alloys with different composition ratios, and the relationship between alloy composition and properties was deeply analyzed. Besides, we also study the thermal analysis kinetics of the alloys. The results show that the Mg–Ni–Zn heat storage alloy mainly contains α-Mg, Mg2Ni, Mg7Zn3, MgZn2 and its eutectic structure. The increase of Zn content is beneficial to the increase of phase transition temperature and phase transition latent heat value, among which the maximum latent heat value of Mg–13%Ni–37%Zn alloy can reach 165 J g−1. In this research, a new type of ternary alloy heat storage material Mg–16%Ni–24%Zn alloy is proposed, and the activation energy of Mg–16%Ni–24%Zn alloy is 1014.99 kJ mol−1 by Coats-Redfern integral equation and extrapolation method. The mechanism function is the Mampel Power rule, and the integral form is G ( α ) = α 3 2 , which is a reference for subsequent researchers. |
| Databáze: | OpenAIRE |
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