Article ID Journal Published Year Pages File Type
1464998 Ceramics International 2006 6 Pages PDF
Abstract

Si3N4 samples were prepared by tape casting, laminating and hot pressing (HP)/spark plasma sintering (SPS). Initially, the as-received Si3N4 powders were chemically treated to improve the dispersion in aqueous media. After surface treatment, a decrease in zeta potential was observed in the basic region. Rheological measurements showed that 40 vol.% Si3N4 slips exhibited a well deflocculated state in the presence of the sintering additives. After the addition of binder and plasticizer, Si3N4 slurries exhibited a shear thinning behavior. The dried green sheets were smooth and homogeneous on both sides. The Si3N4 samples were densified by HP and SPS. A good homogeneity is observed and no single layers can be distinguished in the fracture surface. The mechanical properties were also studied.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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