Analysis of fracture causes in gadolinia-doped ceria ceramics

Kazuhiro Uemura, Kouichi Yasuda, Tadashi Shiota

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The aim of this study is to determine fracture causes of GDC ceramics. GDC ceramics were prepared by sintering C e09gd 01o 2 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 CeO 2 ceramics were cut into specimens of 3 <> 4<> 36 mm 3 and the fracture strength was measured by four-point bending test. After the test, fracture origins of the GDC and CeO 2 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
Publication statusPublished - Dec 1 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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