文章基本信息

标题：Viscous Fingering and Dendritic Growth of Surface Crystallized Sr2TiSi2O8 Fresnoite
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作者：Wolfgang Wisniewski ; Marek Patschger ; Christian Rüssel 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
期号：1
DOI：10.1038/srep03558
语种：English
出版社：Springer Nature
摘要：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.