Solidification velocities in deeply undercooled silver

Wai Lun Chan*, Robert S. Averback, David G. Cahill, Yinon Ashkenazy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

We measure the solidification velocity of pure Ag as a function of undercooling temperature from the melting point (Tm=1235K) to 0.6Tm using ultrafast, pump-probe laser experiments. The thickness of the liquid layer, while it solidifies, is measured using optical third harmonic generation. We show that velocity reaches a maximum value at 0.85Tm, and then remains nearly constant with additional undercooling. These results contradict simple collision-limited models, but they are in good agreement with molecular dynamics simulations presented here, which show that the crystallization velocity depends weakly on temperature from 0.85Tm to less than 0.1Tm.

Original languageAmerican English
Article number095701
JournalPhysical Review Letters
Volume102
Issue number9
DOIs
StatePublished - 2 Mar 2009

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