Non-uniform sintering behavior during spark plasma sintering of Y2O3

Ji Hwoan Lee, Byung Nam Kim, Byung Koog Jang

研究成果: ジャーナルへの寄稿学術誌査読

16 被引用数 (Scopus)

抄録

During spark plasma sintering of Y2O3 ceramics, the evolution of non-uniform microstructure was observed, depending on the heating rate. At low heating rates, the appearance of the sintered bodies is relatively uniform, and the grain size is slightly larger in the center than in the periphery. At high heating rates, however, the sintered bodies are apparently non-uniform to reveal opaque center and translucent periphery, and a difference in the grain size between the center and the periphery increases remarkably. The porosity and the pore size in the center also increase with holding time. The evolution mechanism of the non-uniform microstructure is explained by using a concept of dynamic grain growth and by assuming defect diffusion from the periphery to the center under complicated electric and magnetic fields during spark plasma sintering.

本文言語英語
ページ(範囲)4030-4034
ページ数5
ジャーナルCeramics International
46
3
DOI
出版ステータス出版済み - 2月 15 2020

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • プロセス化学およびプロセス工学
  • 表面、皮膜および薄膜
  • 材料化学

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