Formation of diffusionlessly transformed tetragonal phases by rapid quenching of melts in ZrO 2 -RO 1.5 systems (R = rare earths)

Masahiro Yoshimura, Masatomo Yashima, Tatsuo Noma, Shigeyuki Sōmiya

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76 Citations (Scopus)

Abstract

Rare-earth (Nd, Sm, Er, Yb, Sc)-doped zirconia was melted using an arc-imaging furnace, and rapidly quenched with a hammer and anvil apparatus (cooling rate >10 5 K sec -1 ). These ZrO 2 -RO 1.5 samples were investigated by X-ray diffraction and transmission electron microscopy. The existing region of metastable tetragonal zirconia is from 2 to 14 mol% of RO 1.5 regardless of the species of dopants, RO 1.5 . In the lattice parameters of the tetragonal phases, the unit cell volume corresponds to the ionic radii of dopants, whereas the tetragonality (c/a) is independent of the species of dopants, but dependent on the content of dopants.

Original languageEnglish
Pages (from-to)2011-2016
Number of pages6
JournalJournal of Materials Science
Volume25
Issue number4
DOIs
Publication statusPublished - 1990 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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