Powder processing for fabricating Si{sub 3}N{sub 4} ceramics
- Tokyo Univ. of Agriculture and Technology (Japan)
- Japan Fine Ceramics Center, Nagoya (Japan)
- Nagoya Univ. (Japan)
- Nagaoka Univ. of Technology (Japan)
Usually, the densification of silicon nitride ceramics requires a sintering aid, e.g., alumina and yttria fine powders. Many types of dispersants have been used to obtain a uniform mixture of silicon nitride and sintering aid. These dispersants affect the microstructure and strength of the spray-dried granules. However, few studies have been made of the effects of the microstructure and strength of spray-dried granules. However, few studies have been made of the effects of the microstructure and strength of spray-dried granules on the sintered and mechanical properties of non-oxide ceramics. This article shows the effect of such intergranular porosity--controlled by the strength and structure of spray-dried granules--on the densification of green compacts during sintering. Furthermore, relationships between the fracture strength distribution of spray-dried granules and bending strength distributions of sintered bodies are discussed.
- OSTI ID:
- 554099
- Journal Information:
- American Ceramic Society Bulletin, Journal Name: American Ceramic Society Bulletin Journal Issue: 10 Vol. 76; ISSN 0002-7812; ISSN ACSBA7
- Country of Publication:
- United States
- Language:
- English
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