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

    Fingerprint

    Dive into the research topics of 'Grain‐Size Dependence of Thermal‐Shock Resistance of Yttria‐Doped Tetragonal Zirconia Polycrystals'. Together they form a unique fingerprint.

    Cite this