Solid-liquid interfacial energy of pyrene

AKBULUT S., OCAK Y., BOYUK U., EROL M., KESLIOGLU K., Marasli N.

JOURNAL OF APPLIED PHYSICS, cilt.100, sa.12, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 100 Sayı: 12
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1063/1.2402098
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Yıldız Teknik Üniversitesi Adresli: Hayır

Özet

The equilibrated grain boundary groove shapes for commercial purity pyrene (PY) were directly observed by using a temperature gradient stage. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient and solid-liquid interfacial energy of PY have been determined to be (8.9 +/- 0.9)x10(-8) K m and (21.9 +/- 3.3)x10(-3) J m(-2) with the present numerical model and Gibbs-Thomson equation, respectively. The grain boundary energy of PY phase has been determined to be (42.8 +/- 7.3)x10(-3) J m(-2) from the observed grain boundary groove shapes. Thermal conductivity ratio of liquid phase to solid phase has also been measured to be 0.89. (c) 2006 American Institute of Physics.