Dresden 2011 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 12: Postersitzung I
MM 12.32: Poster
Montag, 14. März 2011, 17:30–19:00, P5
(contribution withdrawn) Quantitative study of the effect of local ordering on the growth kinetics of metallic alloys — M. Guerdane1, B. Nestler1, and •H. Teichler2 — 1Institute of Reliability of Components and Systems, Karlsruhe Institute of Technology (KIT) — 2Institute for Materials Physics, University of Göttingen
We illustrate how local ordering in a metallic melt (NiZr) can transform into a massive in-plane ordering at the surface of a crystal (bcc Zr) when commensurablity is given between the solute-centered clusters of the melt and the periodic potential of the crystal surface for a given orientation. Combined molecular dynamics and phase-field simulations allow to estimate quantitatively the influence of the surface effect on the growth kinetics. This study provides a more complete understanding of the relation between the undercooling ability (e.g. in the case of glass forming alloys) and the pronounced local ordering in the melt.