Viscous fingering and dendritic growth of surface crystallized Sr2TiSi2O8 fresnoite

Scientific Reports
Wolfgang WisniewskiChristian Rüssel

Abstract

During the quenching of a melt with the composition 2SrO·TiO2·2.75SiO2, cubic SrTiO3- and tetragonal Sr2TiSi2O8-crystals are formed at the surface. Subsequent crystal growth leads to dendritic fresnoite structures which become increasingly finer until the mechanism changes to viscous fingering during further cooling. In the final stages of this initial growth step, the crystal orientations of these dendrites systematically change. Due to a complete absence of bulk nucleation in this system, crystal growth is resumed upon reheating to 970°C and fractal growth with the c-axis tilted by about 45° from the main growth direction is observed. The results are interpreted to confirm the link between viscous fingering and dendritic growth in the case of a true crystallization process.

References

Sep 16, 1985·Physical Review Letters·E Ben-JacobL M Sander
Jun 9, 1967·Science·P B Moore, J Louisnathan
Nov 23, 2011·Chemical Reviews·Alexander G ShtukenbergBart Kahr
Jan 30, 2013·Scientific Reports·Yoshihiro TakahashiTakumi Fujiwara
Jul 16, 2013·ACS Applied Materials & Interfaces·Ashkan KeshavarziChristian Rüssel

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Citations

Mar 18, 2015·Scientific Reports·Wolfgang WisniewskiChristian Rüssel
Nov 21, 2017·Inorganic Chemistry·Alberto J Fernandez-CarrionMathieu Allix

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Methods Mentioned

BETA
X-ray

Software Mentioned

TSL OIM Data Collection
TSL OIM Analysis

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