Grain growth behavior of alumina compact processed by controlled fracture forming

Wen Bo Du, Kiyohiko Tatsuzawa, Tatsuhiko Aizawa, Junji Kihara

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The effect of the green microstructure in the swaged Al2O3 with 98% reduction in area by the controlled fracture forming (CFF) on its grain growth behavior was investigated. The kinetics of grain growth in the Al2O3 compacts fabricated by the CFF process and by conventional process was estimated. The results indicate that both Al2O3 compacts obey a cubic law, but the grain growth rate constant K of the conventionally processed Al2O3 is 6 times as large as that of the swaged Al2O3 with 98% reduction in area. The retardation of grain growth in the swaged Al2O3 is attributed to the pores which are homogeneously distributed in the microstructure due to the flow and rearrangement of particles during the CFF process. The increase in number of pores per grain is responsible for the decrease in velocity of grain boundary migration. The mechanism for retardation of grain growth in the swaged Al2O3 is considered to be the pore-controlled mechanism.

本文言語English
ページ(範囲)1129-1135
ページ数7
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
46
11
DOI
出版ステータスPublished - 1999 11

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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