Regensburg 2010 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 48: Topical Session Growth Kinetics IV
MM 48.1: Topical Talk
Donnerstag, 25. März 2010, 11:45–12:15, H4
X-radiographic video microscopy studies of alloy solidification processes — •Ragnvald H Mathiesen1 and Lars Arnberg2 — 1Department of Physics, NTNU, N-7491 Trondheim, Norway — 2Department of Materials Technology, NTNU, N-7491 Trondheim, Norway
The combination of state-of-the art synchrotron X-ray sources and recent developments in X-ray hardware such as focusing optics and fast low-noise high-resolution cameras have opened for in situ studies of solidification processes at spatiotemporal resolutions approaching and even beyond those that can be achieved with optical video microscopy. An overview of recent case studies with Al-Cu and Al-Si based binary and tertiary systems will be given, with particular focus on how the experimental results compares qualitatively and quantitatively with results from modeling at the length and time scales of diffusive and convective mass transport. Finally, results from recent experiments will be presented showing how the boundaries of radiographic performance can be extended both spatially and temporally to address faster dynamics and approach capillarity limited kinetics.