Effects of Solid Volume Fraction on the Gelcasting of Alumina Suspensions

Yong Huang; Li Ming Zhang; Hai Feng Li; Tian Ma

doi:10.4028/www.scientific.net/KEM.280-283.1041

Paper Titles

Colloidal In-Situ Consolidation Forming of Al₂O₃ Ceramics Using Modified Starch
p.1027

Surface Modification of Al₂O₃ Fine Powders and Application in Epoxy Resin
p.1033

Dispersion and Rheological Properties of Alumina Freeze Casting Slurries Containing Nanoparticle/Whisker SiC
p.1035

Rheological Behaviors of Alumina Aqueous Suspensions
p.1039

Effects of Solid Volume Fraction on the Gelcasting of Alumina Suspensions
p.1041

Modification of Al₂O₃ Microfiltration Membrane by Nano-ZnO Coating
p.1045

Mechanical and Wear Properties of Al₂O₃-15wt%ZrO₂ Composites
p.1049

Fabrication of Nano-Micron Al₂O₃-ZrO₂ Ceramic Eutectic Composites from the Melts by the SHS Metallurgical Process
p.1053

Microstructure and Mechanical Properties of Al₂O₃/ZrO₂ Composites Prepared by Gelcasting
p.1057

HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Effects of Solid Volume Fraction on the Gelcasting...

Effects of Solid Volume Fraction on the Gelcasting of Alumina Suspensions

Abstract:

The effects of solid volume fraction (SVF) on the gelation of alumina suspensions for gelcasting, debonding and sintering of the green body were studied. It was found that with SVF rising, the gelation of alumina suspension delayed; and the strength of green body decreased. On the other hand, high SVF resulted in that polymerized acrylamide split at a relative low temperature. These phenomena manifest that the fast polymerization of monomers in high SVF alumina suspension was inhibited, and the flexibility of the gelcasting was improved. However, Excessive solid volume fraction was prone to a bad rheological behavior of alumina suspension, and deteriorated the microstructure and properties of sintered body.