Cavity Damage Accumulation in Alumina Doped with Zirconia or Magnesia

K. Hiraga, K. Nakano, T. S. Suzuki, Y. Sakka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

For an initial grain size of 1. 0 μm, the accumulation of damage volume in a ZrO2-dispersed alumina is shown to proceed more slowly than that in a MgO-doped alumina under a given loading condition, irrespective of higher tensile flow stress in the former than in the latter. The slower damage accumulation in the ZrO2-dispersed alumina is caused from the slower formation snd growth of cavities larger than the initial grain size/ Such slower cavitation is also shown to delay the onset of microcracking. The delayed microcracking leads to higher tensile ductility in the ZrO2-doped material than in the MgO-doped one.

Original languageEnglish
Pages (from-to)431-436
Number of pages6
JournalMaterials Science Forum
Volume304-306
DOIs
Publication statusPublished - 1999 Jan 1
Externally publishedYes

Keywords

  • Cavity formation and growth
  • Microcrack
  • Particle dispersion
  • Tensile ductility

ASJC Scopus subject areas

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

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