Improved low-temperature environmental degradation of yttria-stabilized tetragonal zirconia polycrystals by surface encapsulation

Young Hag Koh, Young Min Kong, Sona Kim, Hyoun Ee Kim

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

An encapsulating layer was deposited on the surface of tetragonal zirconia polycrystals doped with 3 mol% of yttria (3Y-TZP), to prevent low-temperature environmental degradation (aging) of the material. The layer, which was composed of silica and zircon, was formed on the surface by exposing the specimens next to a bed of silicon carbide powder in a flowing hydrogen atmosphere that contained approx. 0.1% water vapor at 1450°C. The layer was approx. 0.5 μm thick and is expected to be under strong residual compressive stress. This encapsulation process remarkably improved the low-temperature degradation of the material. The strength of the specimens also was improved by this process.

Original languageEnglish
Pages (from-to)1456-1458
Number of pages3
JournalJournal of the American Ceramic Society
Volume82
Issue number6
DOIs
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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