Resintering Behavior of Alumina Compact on the Route of Controlled Fracture Forming
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The resintering behavior of swaged Al<SUB>2</SUB>O<SUB>3</SUB> up to 98% reduction in area was investigated to discuss the intense coldworking effect in the green state. The relative density of resintered Al<SUB>2</SUB>O<SUB>3</SUB> 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 Al<SUB>2</SUB>O<SUB>3</SUB> by calculating the activation energy.<BR>The negligibly small grain growth was attributed to the homogeneous microstructure in the green state attained by the controlled fracture forming.
- J. Jpn. Soc. Powder Powder Metallurgy
J. Jpn. Soc. Powder Powder Metallurgy 46(2), 125-130, 1999-02-15
Japan Society of Powder and Powder Metallurgy