Resintering behavior of alumina compact on the route of controlled fracture forming

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

doi:10.2497/jjspm.46.125

Resintering behavior of alumina compact on the route of controlled fracture forming

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

Regional Environment Systems

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The resintering behavior of swaged Al₂O₃ up to 98% reduction in area was investigated to discuss the intense cold-working effect in the green state. The relative density of resintered Al₂O₃ could be improved to be close to 99% theoretical density at 1573 K for 1 h, and negligibly small grain growth was observed when the relative density became less than 97.5%. Grain boundary diffusion was considered to be a dominant mechanism for resintering the swaged Al₂O₃ by calculating the activation energy. The negligibly small grain growth was attributed to the homogeneous microstructure in the green state attained by the controlled fracture forming.

Original language	English
Pages (from-to)	125-129
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	46
Issue number	2
DOIs	https://doi.org/10.2497/jjspm.46.125
Publication status	Published - 1999 Feb

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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abstract = "The resintering behavior of swaged Al2O3 up to 98% reduction in area was investigated to discuss the intense cold-working effect in the green state. The relative density of resintered Al2O3 could be improved to be close to 99% theoretical density at 1573 K for 1 h, and negligibly small grain growth was observed when the relative density became less than 97.5%. Grain boundary diffusion was considered to be a dominant mechanism for resintering the swaged Al2O3 by calculating the activation energy. The negligibly small grain growth was attributed to the homogeneous microstructure in the green state attained by the controlled fracture forming.",

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AU - Kihara, Junji

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AB - The resintering behavior of swaged Al2O3 up to 98% reduction in area was investigated to discuss the intense cold-working effect in the green state. The relative density of resintered Al2O3 could be improved to be close to 99% theoretical density at 1573 K for 1 h, and negligibly small grain growth was observed when the relative density became less than 97.5%. Grain boundary diffusion was considered to be a dominant mechanism for resintering the swaged Al2O3 by calculating the activation energy. The negligibly small grain growth was attributed to the homogeneous microstructure in the green state attained by the controlled fracture forming.

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Resintering behavior of alumina compact on the route of controlled fracture forming

Abstract

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