Thermophysical properties of a Si₅₀Ge₅₀ melt measured on board the International Space Station.

ABSTRACT: Thermophysical properties of highly doped Si₅₀Ge₅₀ melt were measured contactlessly in the electromagnetic levitation facility ISS-EML on board the International Space Station. The sample could be melted, overheated by about 375 K, and cooled down in 350 mbar Argon atmosphere. A large undercooling of about 240 K was observed and a quasi-homogeneous nucleation on the droplet surface occurred. During the cooling phase, high-resolution videos were taken from the side and the top. The density and thermal expansion were evaluated with digital image processing; the viscosity and the surface tension were measured by means of the oscillating drop technique. Inductive measurements of the electrical resistivity were conducted by a dedicated electronics. All data were taken as a

SUBMITTER: Luo Y 

PROVIDER: S-EPMC7096487 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature