Phase-field simulation of platelike grain growth during sintering of alumina

Kazunari Shinagawa, Shoko Maki, Kozo Yokota

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The toughness of alumina can be improved by utilizing the in situ formation of platelike anisotropic grains during sintering, that is, abnormal grain growth (AGG). Computer simulations of AGG may be effective to realize the conditions for obtaining the desired self-composite microstructure. In the first part of this study, sintering experiments of high-purity alumina powders were conducted to confirm the effects of powder size distribution as well as the amounts of additives. In the second part, a phase-field method for simulating the platelike grain growth was proposed. The large platelike grains were reproduced when the critical driving force of coarsening was set up. The incubation time of AGG was also observed in the case of the narrow size distribution. Although the morphology of the platelike grains did not exactly agree with the experimental observations, a possibility of the present method as a computational tool for simulating platelike AGG was verified.

Original languageEnglish
Pages (from-to)3027-3036
Number of pages10
JournalJournal of the European Ceramic Society
Volume34
Issue number12
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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