Dendritic Solidification of Rare Gases
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.
KeywordsXenon Librium Supersaturation Krypton Succinonitrile
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- R. Steininger and J.H. Bilgram, J. Cryst. Growth.Google Scholar
- 6.J.S. Langer, Lectures in the theory of pattern formation, in: Chance and Matter, Proc. Les Houches Summer School, Session XLVI, 1986, Eds. J. Souletie, J. Vannimenus and R. Stora North-Holland, Amsterdam, 1987Google Scholar
- 7.Theory of dendritic solidification is covered by other papers of this conferenceGoogle Scholar
- 8.R. Trivedi and J.T. Mason, Met. Trans. in pressGoogle Scholar
- 9.G.P. Ivantsov, in: Growth of Crystals, Vol. 1 Eds.: A.V. Shubnikov and N.N. Sheftal (Consultants Bureau, New York, 1958) p. 76Google Scholar
- 12.J.H. Bilgram and E. Hürlimann, Proc. VIIth European Symp. on materials and fluid sciences in microgravity, ESA SP-295,173(1990)Google Scholar
- 13.E. Hürlimann, R, Trittibach and J.H. Bilgram, Helv. Phys. Acta 63,473 (1990)Google Scholar
- 14.E. Hürlimann and J.H. Bilgram, this conferenceGoogle Scholar