Shrinkage-rate controlled flash sintering for 3–10 mol %Y2O3-doped ZrO2 polycrystals

Shrinkage-rate controlled flash (SCF) sintering using alternative current electric field was systematically performed for 3–10 mol % Y2O3-doped ZrO2. As results, the uniformly densified compacts with about 99 % relative densities could be produced at furnace temperatures of about 754–781 °C for abou...

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Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2022/12/01, Vol.130(12), pp.906-912
Main Authors: Koike, Masao, Kodaira, Ayu, Tokunaga, Tomoharu, Yamamoto, Takahisa
Format: Article
Language:eng ; jpn
Subjects:
Compacts
Electric fields
FAST
Flash sintering
Polycrystals
Resistance sintering
Shrinkage
YSZ
Yttrium oxide
Zirconia
Zirconium dioxide
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Summary:Shrinkage-rate controlled flash (SCF) sintering using alternative current electric field was systematically performed for 3–10 mol % Y2O3-doped ZrO2. As results, the uniformly densified compacts with about 99 % relative densities could be produced at furnace temperatures of about 754–781 °C for about 30 min as SCF-regime irrespective of Y concentration, while the achieved densities were limited by conventional flash sintering. The shrinkage-rates during SCF-sintering were found to be enhanced in lower temperature range comparing those during thermal-sintering. The enhancement of shrinkage-rates in lower temperature range observed in SCF-sintering is possibly related to the reduction of apparent activation energy of sintering under electric fields.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.22114