Applicability of nitride powders as foaming agents in superplastically foamed ceramics

Hiroshi Yamaoka, Hidetaka Hayashi, Akira Kishimoto

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

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 languageEnglish
Pages (from-to)1233-1235
Number of pages3
JournalJournal of the Ceramic Society of Japan
Volume117
Issue number1371
DOIs
Publication statusPublished - Nov 2009

Keywords

  • Closed pore
  • Foam agent
  • Nitride
  • Superplasticity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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