Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 30: Liquid and Amorphous Metals
MM 30.10: Vortrag
Donnerstag, 8. September 2022, 12:45–13:00, H46
Thermophysical study of anomalies and transitions in liquid Bi-Ga and Ga-In systems — •Yuri Kirshon1, Shir Ben-Shalom1, Moran Emuna2, Yaron Greenberg2, Eyal Yahel2, and Guy Makov1 — 1Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel — 2Physics Department, Nuclear Research Centre-Negev, Beer-Sheva 84190, Israel
Interest in the properties and applications of liquid metals has been reignited and leading to innovative new pathways. Work on low-melting alloys provided new products such as Galinstan liquid metal thermometers, self-healing electronic devices and cooling systems for high-temperature reactors. However, due to the experimental challenges, study of thermophysical properties of liquid binary systems remains limited. In particular, Bi-Ga and Ga-In alloys have attracted scientific interest due to possible changes in their liquid structure, reported recently [Q.Yu (2017), Z.Wang (2017), Y.Kirshon (2019)]. In the present contribution, we report on thermophysical measurements conducted on Bi-Ga and Ga-In alloys. Custom table-top resistivity and differential thermal analysis (DTA) setups are presented, including a demonstration of their capability to capture subtle transitions in the melts. We observed evidence of liquid-liquid crossover in the liquid Ga-In, measured both systems at a temperature range in good agreement with previous density measurements. In the Bi-Ga system, we probed the liquid-liquid miscibility gap and were able to obtain the latent heat and resistivity change during the liquid de-mixing process. Both results were in good agreement with previous reports.