Capsule Free Hot Isostatic Pressing of Ceria-Doped Tetragonal Zirconia Powder Crystallized in Supercritical Methanol

  • Shu Yin (Institute for Chemical Reaction Science, Tohoku University) ;
  • Satoshi Uehida (Institute for Chemical Reaction Science, Tohoku University) ;
  • Yoshinobu Fujishiro (Institute for Chemical Reaction Science, Tohoku University) ;
  • Mamoru Ohmori (Institute for Materials Research,Tohoku University) ;
  • Tsugio Sato (Institute for Chemical Reaction Science, Tohoku University)
  • 발행 : 1999.03.01

초록

Capsule free hot isostatic pressing (HIPing) of 12 mol% $CeO_2-88 mo% ZrO_2 (12CeO_2-88ZrO_2)$ powder was conducted at 1100~$1200^{\circ}C$ using the powder crystallized in supercritical methanol followed by supercritical drying. Porous $12CeO_2-88ZrO_2$ ceramics with ~35% open porosity, micropore diameter of ~23 nm and a narrow pore size distribution were fabricated by capsule free hot isostatic pressing at $1100^{\circ}C$. The porosity increased with decrease in HIPing temperature and was accompanied by a steady decrease in fracture strength.

키워드

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