Effect of particle morphology of Al2O3 on gelcasting of ZrO2/Al2O3 ceramics

Jinzhen Zeng, Wei Mu, Jian Yang, Wei Wan, Tai Qiu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The rheological behaviors of the ZrO2/Al2O3 (ZTA) suspension were investigated using three kinds of Al2O3 with different particle morphology. ZrO2/Al2O3 green bodies and ceramics were prepared by using a low-toxicity monomer N, N-dimethyl acrylamide (DMAA) as gelling agent. The effect of dispersant dosage, milling time and solid loading on the rheological properties of suspension were discussed. Tabular Al2O3 powders have good effect on decreasing viscosity of slurries and clubbed Al2O3 powders are good for flexural strength of green bodies. The particles in ZrO2/Al2O3 green bodies are combined closely and their bending strength can reach 21.45, 19.87, 25.90 MPa, respectively. Granular Al2O3 powders are beneficial properties of sintered ceramics, and the mean bending strength and fracture toughness of sintered ceramics are 680 MPa and 7.49 MPa·m1/2, 453.1 MPa and 6.8 MPa·m1/2, 549.4 MPa and 6.34 MPa·m1/2.

Original languageEnglish
Pages (from-to)416-422
Number of pages7
JournalFuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
Volume31
Issue number2
StatePublished - Apr 2014

Keywords

  • Gelcasting
  • Particle morphology
  • Viscosity

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