Slip casting and pressure slip casting of Si{sub 3}N{sub 4} aqueous suspensions

Conference · Fri Sep 01 00:00:00 EDT 1995

OSTI ID:99160

Castanho, S M ^[1]; Moreno, R ^[2]; Salomoni, A; Stamenkovic, I ^[3]

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1. Institut Pesquisas Energeticas e Nucleares, Sao Paulo (Brazil)
2. Instituto de Ceramica y Vidrio, Madrid (Spain)
3. Italian Ceramic Center, Bologna (Italy)

The stability of silicon nitride aqueous slips has been studied in order to obtain Si{sub 3}N{sub 4} pressureless sintered compacts. High solid content slips (up to 65 wt%) have been prepared by using tetramethylammonium hydroxide as dispersing agent. The effect of sintering aids on the rheology and casting conditions has been studied by slip casting and uniaxial pressure filtration. The casting rate, the green density and the microstructure of samples obtained from both slurry consolidation techniques have been compared taking into account the role of the sintering additives. Sintering of cast green specimens has been performed at 1750{degrees}C in N{sub 2} atmosphere.

• OSTI ID: 99160
• Report Number(s): CONF-940911-; TRN: 95:005310-0050
• Resource Relation: Conference: 5. international conference on ceramic processing science and technology, Friedrichshafen (Germany), 11-14 Sep 1994; Other Information: PBD: 1995; Related Information: Is Part Of Ceramic transactions: Ceramic processing science and technology. Volume 51; Hausner, H.; Messing, G.L.; Hirano, Shin-ichi [eds.]; PB: 835 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON NITRIDES
PROCESSING
SLIP CASTING
GRAIN SIZE
RHEOLOGY
SLURRIES
SINTERING