On the interest of microgravity experimentation for studying convective effects during the directional solidification of metal alloys

Henri Nguyen-Thi (1) , Guillaume Reinhart (1) , Bernard Billia (1)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

Under terrestrial conditions, solidification processes are often affected by gravity effects, which can significantly influence the final characteristics of the grown solid. The low-gravity environment of space offers a unique and efficient way to eliminate these effects, providing valuable benchmark data for the validation of models and numerical simulations. Moreover, a comparative study of solidification experiments on earth and in low-gravity conditions can significantly enlighten gravity effects. The aim of this paper is to give a survey of solidification experiments conducted in low-gravity environment on metal alloys, with advanced post-mortem analysis and eventually by in situ and real-time characterization. (C) 2016 Academie des sciences. Published by Elsevier Masson SAS.

Mots clés: Directional solidification; Microstructures; Convection; Microgravity; In situ characterization; Metallic alloys

Domaines: Micro et nanotechnologies/Microélectronique

Henri Nguyen-Thi, Guillaume Reinhart, Bernard Billia. On the interest of microgravity experimentation for studying convective effects during the directional solidification of metal alloys. Comptes Rendus Mécanique, 2017, 345 (1), pp.66-77. ⟨10.1016/j.crme.2016.10.007⟩. ⟨hal-01694469⟩