Texture development by templated grain growth in liquid-phase-sintered α-alumina

Matthew M. Seabaugh, Ingrid H. Kerscht, Gary L. Messing

Research output: Contribution to journalArticle

272 Scopus citations

Abstract

The distribution and orientation of platelet-shaped particles of α-alumina in a fine-grained alumina matrix is shown to template texture development via anisotropic grain growth. The textured microstructure ranges from 4 wt% oriented platelet particles in calcined samples to nearly 100% oriented α-Al 2O 3 grains after sintering at 1400°C. A CaO + SiO 2 liquid phase creates favorable thermodynamic and kinetic conditions for anisotropic grain growth and grain reorientation during sintering. Important criteria for templated grain growth include (1) anisotropic crystal structure and growth, (2) high thermodynamic driving force for template grain growth, and (3) modification of diffusion in the system to continuously provide material to the anisotropically growing template grains.

Original languageEnglish (US)
Pages (from-to)1181-1188
Number of pages8
JournalJournal of the American Ceramic Society
Volume80
Issue number5
StatePublished - May 1 1997

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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