Article ID Journal Published Year Pages File Type
1575699 Materials Science and Engineering: A 2014 4 Pages PDF
Abstract

In this work, alumina ceramics were prepared via gel-casting by mixing plate-like and granular alumina powders. Plate-like alumina with a hexagonal or disk-shaped morphology decreased the viscosity of the suspension remarkably, which made the casting process much easier. As the plate-like alumina content varied from 10 wt%, 30 wt%, 50 wt%, 70 wt% to 100 wt%, the density and bending strength of the sintered ceramics increased firstly then decreased and reached their maximum at the content of 50 wt%. However, the microhardness and fracture toughness presented negligible dependence on plate-like alumina content. It is worth noting that all samples with plate-like alumina displayed lower density and bending strength but higher fracture toughness than the sample without plate-like alumina.

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Physical Sciences and Engineering Materials Science Materials Science (General)
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