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

Kazunari Shinagawa, Shoko Maki, Kozo Yokota

研究成果: ジャーナルへの寄稿学術誌査読

15 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)3027-3036
ページ数10
ジャーナルJournal of the European Ceramic Society
34
12
DOI
出版ステータス出版済み - 10月 2014
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 材料化学

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