Objects Interacting with Solidification Fronts: Thermal and Solute Effects - Archive ouverte HAL Access content directly
Journal Articles Materialia Year : 2020

Objects Interacting with Solidification Fronts: Thermal and Solute Effects

Abstract

In many materials processing routes, objects such as bubbles or particles interact with a moving solidification front. The output of this confrontation, from instantaneous encapsulation to complete rejection of objects, regulates the solidified microstructure and the spatial distribution of the objects, and thus the final properties of the materials. Here we investigate by in situ cryo-confocal microscopy how thermal conductivity and solute compete to control the interfacial curvature of the solidification front. We first validate the prediction of physical models in absence of solute, and then demonstrate the dominating effect of solute. In the case of cellular front morphology, we show that thermal effects depending on the particle conduc- tivity induce a distortion of ice crystals thereby modifying the final microstructure of the solid. Overall our results show that to success- fully predict and control solidification microstructure in the presence of objects, physical models that take into account both thermal and long-range solute effects are now required.
Fichier principal
Vignette du fichier
Objects Interacting with Solidification Fronts - Thermal and Solute Effects.pdf (6.91 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02525640 , version 1 (31-03-2020)

Identifiers

Cite

Sidhanth Tyagi, Helene Huynh, Cécile Monteux, Sylvain Deville. Objects Interacting with Solidification Fronts: Thermal and Solute Effects. Materialia, 2020, 12, pp.100802. ⟨10.1016/j.mtla.2020.100802⟩. ⟨hal-02525640⟩
139 View
70 Download

Altmetric

Share

Gmail Facebook X LinkedIn More