The surface tension force of anisotropic interphase boundaries is perpendicular to the solidification front during eutectic growth

Bottin-Rousseau S., ŞEREFOĞLU KAYA M., Akamatsu S., Faivre G.

3rd International Conference on Advances in Solidification Processes, Hollanda, 7 - 10 Haziran 2011, cilt.27 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 27
  • Doi Numarası: 10.1088/1757-899x/27/1/012088
  • Basıldığı Ülke: Hollanda
  • Marmara Üniversitesi Adresli: Hayır

Özet

The irregular growth dynamics of the so-called locked (tilted) lamellar eutectic grains that are observed in directional solidification of nonfaceted/nonfaceted eutectic alloys, is attributable to a strong surface tension anisotropy of the interphase boundaries, which enters into the local-equilibrium (Young-Herring) condition at the trijunctions of the solid-liquid interfaces. Based on real-time observations of locked eutectic growth in thin samples, we propose that the lamellar tilt angle is selected by the system in such a way that the Hoffmann-Cahn surface tension force ((sigma) over right arrow vector) of the interphase boundaries is approximatively perpendicular to the solidification front.