Features of crystallization of the eutectic alloy in the gallium-indium system
V. D. Aleksandrov, S. A. Frolova, D. A. Shkilniuk, D. V. Maltsev
Donbas National Academy of Civil Engineering and Architecture
Annotation: The method of cyclic thermal analysis was used to study the effect of overheating of the melt of the eutectic alloy Ga + 14.2 mol% In on the value of precrystallization supercooling on samples weighing 2 g. It has been established that when superheating a liquid eutectic is higher than the eutectic temperature TE = 288.3 K and subsequent cooling, the dependence of supercooling from overheating has a monotonically increasing character. The limiting value of supercooling is 25 K after preliminary heating of the melt to 400 K. It has been established that crystallization from a supercooled state was always “explosive” at a rate of ≈40-45 K / s. In this case, neither the cooling rate from 0.01 to 10 K / s nor the long-term (for several hours) isothermal exposure of the melt in superheated and supercooled conditions affected the magnitude of supercooling.
Keywords: gallium, indium, eutectic alloy, thermal analysis, overheating, pre-crystallization supercooling, extreme supercooling.
Pages: 73-75.
Link for citation: Aleksandrov, V. D.; Frolova, S. A.; Shkilniuk, D. A. [et al.]. Features of crystallization of the eutectic alloy in the gallium-indium system. – Text : direct. – In: The Donbas Constructon. – 2019. – Issue 4-2019. – Р. 73-75.
Issue 4-2019Journal: The Donbas Constructon
Publish house: Donbas National Academy of Civil Engineering and Architecture