Dendritic Solidification of Rare Gases

  • J. H. Bilgram
  • E. Hürlimann
Part of the NATO ASI Series book series (NSSB, volume 276)

Abstract

Rare gases Kr and Xe have been used to study dendritic solidification of a pure melt. The advantages of using single component systems in comparison to solution systems are: short relaxation times and good repro-ducibility. The parameters characterizing the shapes of the dendrite tips have been determined. The volume solidification rate of dendrites increases with increasing supercooling of the melt, thus the stability-“constant” decreases with increasing supercooling. The volume of dendrites V has been determined as a function of the length L of the dendrite. V ∝ L3. The average density of a dendrite V/L3 is independent of L, dendrites are no fractals. V/L3 decreases with increasing supercooling. A model is presented, which describes the volume of the dendrites.

Keywords

Xenon Librium Supersaturation Krypton Succinonitrile 

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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • J. H. Bilgram
    • 1
  • E. Hürlimann
    • 1
  1. 1.Laboratorium für FestkörperphysikETHZürichSwitzerland

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