Dependency of the dendritic arm spacings and tip radius on the growth rate and composition in the directionally solidified succinonitrile-carbon tetrabromide alloys

Kaya H., Çadirli E., Keşlioǧlu K., Maraşlı N.

Journal of Crystal Growth, vol.276, no.3-4, pp.583-593, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 276 Issue: 3-4
  • Publication Date: 2005
  • Doi Number: 10.1016/j.jcrysgro.2004.11.392
  • Journal Name: Journal of Crystal Growth
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.583-593
  • Keywords: dendrites, solidification, growth from melt, organic compounds
  • Istanbul Gelisim University Affiliated: No

Abstract

Succinonitrile (SCN)-carbon tetrabromide (CTB) alloys for different concentrations of CTB (C0) were unidirectionally solidified with a constant temperature gradient (G=7.5 K/mm) at different growth rates (V=6.5-103.5 μm/s). The primary dendrite arm spacings, secondary dendrite arm spacings and dendrite tip radius were measured as a function of growth rates and compositions. Theoretical models for the dendrite arm spacings and tip radius have been compared with the experimental observations, and a comparison of our results with the current theoretical models and previous experimental results have also been made. © 2005 Elsevier B.V. All rights reserved.