Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria

Roman Korobko, Chien Ting Chen, Sangtae Kim, Sidney R. Cohen, Ellen Wachtel, Nimrod Yavo, Igor Lubomirsky

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

High-density ceramics of ceria doped with 0, 3, 5, 10, 15 and 20 mol.% Gd and with grain sizes exceeding 1.5 μm were investigated by nanoindentation. The deduced elastic moduli are independent of Gd content and remain close to the value reported for bulk ceramics (210 ± 5% GPa). All ceramics exhibit transient creep with displacement proportional to the 1/3 power of the time. For 0.05 < x < 0.2, the derived creep magnitude parameter decreases linearly with increasing Gd content. These results strongly suggest that defect rearrangement influences the measurements.

Original languageEnglish
Pages (from-to)155-158
Number of pages4
JournalScripta Materialia
Volume66
Issue number3-4
DOIs
Publication statusPublished - Feb 1 2012

Keywords

  • Creep rate
  • Elastic modulus
  • Gd-doped ceria
  • Nanoindentation

ASJC Scopus subject areas

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

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