Modeling anisotropic single crystal growth kinetics in liquid phase sintered α-Al2O3

Seabaugh M. M., Suvaci E., Brahmaroutu B., Messing G. L.

Interface Science, vol.8, no.2, pp.257-267, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 2
  • Publication Date: 2000
  • Doi Number: 10.1023/a:1008716303645
  • Journal Name: Interface Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.257-267
  • Keywords: alpha alumina, grain growth, anisotropy, template, seeding, modelling, TEMPLATED GRAIN-GROWTH, ALUMINA, TITANATE, TEXTURE
  • Anadolu University Affiliated: Yes

Abstract

Single crystals of α-alumina with {0001}, {11̄20} and {01̄12} orientations were embedded in a matrix of liquid phase sintered alumina to study α-alumina single crystal growth in the presence of a calcium aluminosilicate liquid. Growth on the {11̄20} and {01̄12} surfaces was observed to occur by a diffusion-controlled mechanism while growth on the basal surface was controlled by two-dimensional nucleation. Growth models, which incorporate the change in matrix grain size, were derived and shown to fit the growth kinetics.