Oxidation-induced strengthening and toughening behavior in micro- and nano-composites of Y2O3/SiC system

Masashi Yoshimura, Tatsuki Ohji, Mutsuo Sando, Yong Ho Choa, Tohru Sekino, Koichi Niihara

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Effects of oxidation on mechanical properties has been investigated for micro- and nano-composites of Y2O3-SiC systems. SiC particles with mean sizes of 5 μm and 300 nm were dispersed in the former and latter material, respectively. The room temperature fracture strength and toughness increased after oxidation around 900-1000°C for both the composites; the nanocomposite showed much larger increases than the micro-composite. The micro structural observations and the residual stress measurements revealed that these improvements are mainly due to the surface compressive stress generated by the oxidized SiC particles.

Original languageEnglish
Pages (from-to)139-143
Number of pages5
JournalMaterials Letters
Volume35
Issue number3-4
DOIs
Publication statusPublished - 1998 May

Keywords

  • Fracture strength
  • Heat treatment
  • Nanocomposites
  • Silicon carbide
  • Yttrium oxide

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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