Berlin 2024 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 57: Phase Transformations III
MM 57.3: Vortrag
Donnerstag, 21. März 2024, 12:15–12:30, C 230
Bicontinuous microstructure formation through partial melting — •Zhongyang Li1, Lukas Lührs1, and Jörg Weissmüller1,2 — 1Institute of Materials Physics and Technology, Hamburg University of Technology, Hamburg — 2Institute of Materials Mechanics, Helmholtz-Zentrum Hereon, Geesthacht
A bicontinuous bulk metal composite is synthesized with partial melting in this study. A single phase CuIn alloy is heated into the solid-liquid phase coexistence region at 843*C and forms an interpenetrated solid phase and liquid phase automatically. The underlying formation mechanism of this special structure is closely related to the grain boundary wetting phenomenon at high temperature. The completely and incompletely wetted grain boundaries at partial melting temperature are responsible for the connectivity of the liquid phase and the solid phase respectively. The bicontinuous structure can be preserved by quenching. Both interpenetrated solid and liquid phase can be obtained with a relatively short duration of partial melting and remain bicontinuous when exposed to prolonged heating. This research found a novel and easy method of producing bicontinuous bulk metal composite, with potential applicability to a wide range of other alloy systems.
Keywords: bicontinuous metal composite; CuIn alloy; partial melting; grain boundary wetting