Interfacial energy of solid In2Bi intermetallic phase in equilibrium with In-Bi eutectic liquid at 72 °C equilibrating temperature

Akbulut S., Ocak Y., Maraşlı N., Keşlioǧlu K., Böyük U., Çadirli E., ...Daha Fazla

Materials Characterization, cilt.59, sa.8, ss.1101-1110, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59 Sayı: 8
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.matchar.2007.08.028
  • Dergi Adı: Materials Characterization
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1101-1110
  • Anahtar Kelimeler: In2Bi intermetallic phase, crystal growth, interfacial energy, grain boundary energy, thermal conductivity
  • İstanbul Gelişim Üniversitesi Adresli: Hayır

Özet

A radial temperature gradient on the sample was established by heating from centre with a single heating wire and cooling the outside of sample at - 10 °C with a heating/refrigerating circulating bath containing an aqueous ethylene glycol solution. The equilibrated grain boundary groove shapes of solid In2Bi (In-33.2 at.% Bi) in equilibrium with In-Bi eutectic liquid (In-22 at.% Bi) were observed from quenched sample at 72 °C. Gibbs-Thomson coefficient and solid-liquid interfacial energy of solid In2Bi in equilibrium with In-Bi eutectic liquid have been determined to be (11.3 ± 0.6) × 10- 8 K m and (47.8 ± 4.8) × 10- 3 J m- 2 from the observed grain boundary groove shapes. The grain boundary energy of solid In2Bi phase has been calculated to be (92.8 ± 10.2) ×10- 3 J m- 2 by considering a force balance at the grain boundary grooves. The thermal conductivities of solid In solution (In-12.4 at.% Bi), solid In2Bi (In-33.2 at.% Bi ), the eutectic liquid phase (In-22 at.% Bi) and their ratio at 72 °C have also been measured with radial heat flow apparatus and Bridgman type growth apparatus. © 2007 Elsevier Inc. All rights reserved.