Microstructure and mechanical properties of yttria stabilized zirconia/silicon carbide nanocomposites

Noriko Bamba, Yong Ho Choa, Tohru Sekino, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Fully stabilized 8YSZ/SiC nanocomposites were fabricated by hot-pressing technique, and the microstructure and mechanical properties were investigated. The fine SiC particulate inhibits densification and grain growth, this is due to the decreasing grain boundary diffusivity and mobility. Compared with the monolith, the composite system possesses narrow and homogeneous grain size distribution, and this tendency becomes more obvious with increasing SiC content. The fine and homogeneous microstructure improves the fracture strength; for instance, 5 and 20 vol% SiC nanocomposites showed 580 and 750 MPa of the strength, respectively. Fracture toughness was found to be improved due to the crack deflection at the crack tip.

Original languageEnglish
Pages (from-to)693-699
Number of pages7
JournalJournal of the European Ceramic Society
Volume18
Issue number6
DOIs
Publication statusPublished - 1998 Jun
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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