MEASUREMENTS OF SOLID-LIQUID INTERFACIAL ENERGIES IN THE ORGANIC MONOTECTIC ALLOYS


Boyuk U. , YÜCEER K., Keslioglu K., ÜLGEN A. , Marasli N.

SURFACE REVIEW AND LETTERS, cilt.16, ss.203-214, 2009 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 16 Konu: 2
  • Basım Tarihi: 2009
  • Dergi Adı: SURFACE REVIEW AND LETTERS
  • Sayfa Sayıları: ss.203-214

Özet

The commercial purity dibromobenzene (DBB) and succinonitrile (SCN) were purified using a columnar distillation system. Thin walled rectangular specimen cells (60-80 mu m thick) were fabricated and filled with the purified materials under the vacuum. The specimen cell was placed in a horizontal temperature gradient stage. A thin liquid layer was melted and the specimen was annealed in a constant temperature gradient for an enough time to observe the equilibrated grain boundary groove shapes. The thermal conductivities of solid and liquid phases for the purified DBB and DBB-5.7mol% SCN alloy were determined with the radial heat flow and the Bridgman-type growth apparatuses. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficients, solid-liquid interfacial energies, and the grain boundary energies for solid DBB in equilibrium with its melts and solid DBB in equilibrium with DBB-SCN monotectic liquid have been determined. The temperature coefficients of the purified DBB and DBB-5.7mol% SCN alloy were also determined from thermal conductivity curve vs temperature.