Abstract
The applicability of several nitride powders for use as foaming agents in superplastically foaming ceramics was investigated. Ceramic mono-foams were fabricated successfully using AlN and Si3N4 foaming agents. By using BN as a foam agent, on the other hand, we cannot fabricated well developed ceramic foams due to cracking and fracture. When the quantity of foaming agent was increased, the porosity increased to a certain amount, then saturated. With equal amounts of Si3N4, the porosity from the dispersed foaming agent was higher than that obtained from a monolithic compact without mixing, which was similar to the case of SiC foam agent.
Original language | English |
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Pages (from-to) | 1233-1235 |
Number of pages | 3 |
Journal | Journal of the Ceramic Society of Japan |
Volume | 117 |
Issue number | 1371 |
DOIs | |
Publication status | Published - Nov 2009 |
Keywords
- Closed pore
- Foam agent
- Nitride
- Superplasticity
ASJC Scopus subject areas
- Ceramics and Composites
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry