Thermophysical Properties of Molten Fe–Cu Alloy Measured Using the Electrostatic Levitation Furnace Aboard the International Space Station (ISS-ELF) under Microgravity Conditions

The thermophysical properties of molten Fe–Cu alloys, including density, surface tension, and viscosity, were measured using the electrostatic levitation furnace aboard the International Space Station (ISS-ELF) under microgravity conditions, which provided an environment that facilitated accurate me...

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Bibliographic Details
Published in:ISIJ International 2024, pp.ISIJINT-2024-277
Main Authors: Seimiya, Yusaku, Kobatake, Hidekazu, Tono-Oka, Kazuki, Sugahara, Riku, Kurosawa, Shuya, Shiratori, Suguru, Sugioka, Ken-ichi, Ishikawa, Takehiko, Koyama, Chihiro, Watanabe, Yuki, Shimonishi, Rina, Ozawa, Shumpei
Format: Article
Language:English
Subjects:
density
electrostatic levitation
microgravity
surface tension
thermal storage
viscosity
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Summary:The thermophysical properties of molten Fe–Cu alloys, including density, surface tension, and viscosity, were measured using the electrostatic levitation furnace aboard the International Space Station (ISS-ELF) under microgravity conditions, which provided an environment that facilitated accurate measurements. The densities of the molten Fe–25at%Cu and Fe–50at%Cu alloys decreased linearly with increasing temperature, and higher copper compositions resulted in increased density. The surface tension of the molten alloys exhibited a unique up-convex temperature dependence curve that initially increased and then decreased as the temperature increased. Viscosity measurements indicated that the viscosity of the molten Fe–Cu alloys decreased with increasing temperature, following a quadratic curve, and that an increase in the copper composition resulted in lower viscosity.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.ISIJINT-2024-277