Al2O3-ZrO2 composites prepared by gelcasting

Baoxiang Jiao, Chuncheng Li, Tai Qiu, Chunying Shen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The effects of pH value, the amount of dispersant, ZrO2(3Y) content and solid volume fraction on viscosity of ZTA ceramic slurries were discussed. The mechanical properties and microstructure of sintered ZTA samples by gelcasting were investigated. The results show that low viscosity ZTA (20% ZrO2) suspension with 55% solid volume fraction is obtained at pH 8.5 and 0.9% dispersant. The sintered sample prepared with high solid volume fraction of the suspension has the advantages of compact structure, uniformity distribution of ZrO2 particles and higher content of t-ZrO2 phase. Its bending strength and fracture toughness are 631.5 MPa and 7.64 MPa·m1/2 under the test condition, respectively.

Original languageEnglish
Pages (from-to)125-129
Number of pages5
JournalFuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
Volume21
Issue number6
StatePublished - Dec 2004

Keywords

  • Composite ceramic
  • Gelcasting
  • Mechanical performance
  • Microstructure
  • Viscosity

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