Grain‐Size Dependence of Thermal‐Shock Resistance of Yttria‐Doped Tetragonal Zirconia Polycrystals

Masayuki Ishitsuka, Tsugio Sato, Tadashi Endo, Masahiko Shimada, Hideo Ohno, Naoki Igawa, Takanori Nagasaki

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Thermal‐shock fracture behavior of yttria‐doped tetragonal zirconia polycrystals (Y‐TZP) of various grain sizes was evaluated by the quenching method using water as the quenching solvent. The tetragonal‐to‐monoclinic phase transformation behavior of Y‐TZP around cracks introduced by thermal stress was investigated by using Raman microprobe spectroscopy. The critical quenching temperature difference (ΔTc) of Y‐TZP ceramics increased from 250° to 425°C with increasing grain size of zirconia from 0.4 to 3.0 μm, while the fracture strength decreased from 900 to 680 MPa. The improvement of ΔTc of Y‐TZP with increasing grain size of zirconia corresponded with the quantity of tetragonal‐to‐monoclinic phase transformation around cracks introduced by thermal stress.

Original languageEnglish
Pages (from-to)2523-2525
Number of pages3
JournalJournal of the American Ceramic Society
Volume73
Issue number8
DOIs
Publication statusPublished - 1990 Jan 1

Keywords

  • fracture
  • grain size
  • quenching
  • thermal shock
  • yttriastabilized tetragonal polycrystals

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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