The dynamics of coarsening in highly anisotropic systems: Si particles in Al–Si liquids

摘要: Abstract The coarsening process of an Al–29.9wt%Si alloy is studied using four-dimensional phase contrast X-ray tomography. This composed highly anisotropic, primary Si particles in eutectic matrix. We analyze the morphology during by determining interface normal distribution and shape distribution. inverse surface area per unit volume increases with cube root time despite lack microstructural self-similarity anisotropic particle morphology. More specifically, over frame experiments, evolve from mostly faceted domains to a more isotropic structure that not given Wulff crystal. These trends can be rationalized presence twin defects intersect edges may provide kink sites necessary for interfacial propagation, thus leading structure. While many cases velocity solid–liquid interfaces leads mobile diffusion-limited coarsening.