Analysis of fracture causes in gadolinia-doped ceria ceramics

Kazuhiro Uemura, Kouichi Yasuda, Tadashi Shiota

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The aim of this study is to determine fracture causes of GDC ceramics. GDC ceramics were prepared by sintering Ce09gd01o2 powder compacts at 1200, 1300, 1400°C for 2 hours in air. To discuss the effect of doping 0d203, pure CeO2 ceramics were also made by sintering at 1300°C. The GDC and CeO2 ceramics were cut into specimens of 3 <> 4<> 36 mm3 and the fracture strength was measured by four-point bending test. After the test, fracture origins of the GDC and CeO2 ceramics were identified by SEM fractography. The experimental results suggest that bending strength of GDC was mainly controlled by large pore generated by nonstoichiometry of ceria.

Original languageEnglish
Pages (from-to)535-543
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume77
Issue number775
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • Ceramics
  • Fractography
  • Material Flaw
  • Solid Oxide Fuel Cell
  • Strength

ASJC Scopus subject areas

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

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