Abstract
Experimental studies of the thermal expansion, heat capacity and thermal conductivity of the eutectic magnesium–lithium alloy (with composition of 23.0 at.% lithium) were performed in the temperature range of 80 K to 400 K. The relative elongation and thermal expansion coefficient of this ultralight magnesium–lithium alloy were measured by the dilatometric method using a DIL-402C setup. Measurements of the heat capacity were carried out by the differential scanning calorimetry using a DSC 404 F1 setup. Investigation of the thermal conductivity was performed by the hot-disk technique using a Hot-Disk TPS 2500S setup. The temperature dependences were constructed and tables of recommended values of the investigated properties were presented. It was found that in Mg77Li23 alloy a phase transition occurs in the range of 223 K to 253 K, where the heat capacity and the linear thermal expansion coefficient change abruptly. This transition is presumably related to the martensitic transformation of the lithium-rich bcc magnesium–lithium alloys to the hcp structure.
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Data presented in this article are available upon request from the corresponding author.
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Acknowledgements
This work was supported by the Russian Science Foundation (Grant No. 20-79-10025). Link to the project information: https://rscf.ru/en/project/20-79-10025/.
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RNA, writing; YMK, dilatometric and hot-disk measurements; DAS, DSC and hot-disk measurements; SVS, supervision; AShA, samples preparation. All authors have read and agreed to the published version of the manuscript.
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Abdullaev, R.N., Kozlovskii, Y.M., Samoshkin, D.A. et al. Peculiarities of the Eutectic Mg–Li Alloy Thermal Expansion, Heat Capacity and Thermal Conductivity Behavior in the Temperature Range of 80 K to 293 K. Int J Thermophys 44, 104 (2023). https://doi.org/10.1007/s10765-023-03212-3
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DOI: https://doi.org/10.1007/s10765-023-03212-3