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| 1 | Microstructures and thermal properties of Sn-Bi-Pb-Zn alloys as heat storage and transfer materials显示文摘Low-melting-point alloy has the characteristics of high thermal conductivity,low solidus temperature and the wide range of use temperature,which is a potential heat transfer medium.The microstructure and thermal properties of Sn-Bi-Pb-Zn alloys as heat transfer and storage material were investigated in this paper.The phase compositions,microstructure and thermal properties were investigated by X-ray diffusion (XRD),electron probe microanalysis (EPMA) and differential scanning calorimeter (DSC) analysis,respectively.The results show that the phases of Sn-Bi-Zn and Sn-Pb-Zn alloys are mainly eutectic formed by solid solution,while the formation of Pb7Bi3 intermetallic compounds decreases the melting point of Sn-Bi-Pb and Bi-Pb-Zn.The thermal properties of the zinc-containing alloys are better than that of Sn-Bi-Pb,but the weight of the zinc-containing alloys significantly reduces above 900 ℃.As the density,specific heat capacity and thermal diffusivity change with temperature and physical state,the thermal conductivity of the alloys first decreases and then increases.These results demonstrate the feasibility of using low-melting alloys as the heat transfer and storage material. | Qing-Meng Wang Xiao-Min Cheng Yuan-Yuan Li Guo-Ming Yu Zhi Liu | 2019 | Rare Metals2019，38，4： | 3 |
| 2 | Microstructures and Thermal Properties of Sn–Bi–Zn–Ga Alloys as Heat Transfer and Heat Storage Materials显示文摘Low melting point alloy is a potential high-temperature heat transfer medium because of the high thermal conductivity, low solidus temperature and wide range of use temperature. Consequently, we investigated the possibility of using Sn-Bi-Zn-Ga alloys as heat storage and heat transfer material. Moreover, we investigated the microstructure and phase compositions by electron probe micro-analysis (EPMA) and X-ray diffusion (XRD). Results show that the new structures and phases are formed in the alloy matrix with Ga additions, which lead to the improvement of the thermal properties. An extensive thermophysical characterization of the Sn-Bi-Zn-Ga alloys has been performed by differential scanning calorimeter (DSC) analysis. The addition of Ga lowers the peak temperature and increases the heat capacity of the alloys. The thermal expansion of the test alloys increases with increasing temperature and the densities decreases with Ga additions. As the density, specific heat capacity and thermal diffusivity change with temperature and physical state, the thermal conductivity of the alloys first decreases and then increases. These results demonstrate the feasibility of using Sn-Bi-Zn-Ga alloys as the high-temperature heat transfer fluid. | 王青萌 程晓敏 LI Yuanyuan YU Guoming LIU Zhi | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，3： | 0 |
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