Analysis of fracture causes in gadolinia-doped ceria ceramics

Kazuhiro Uemura; Kouichi Yasuda; Tadashi Shiota

doi:10.1299/kikaia.77.535

Analysis of fracture causes in gadolinia-doped ceria ceramics

Kazuhiro Uemura, Kouichi Yasuda, Tadashi Shiota

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The aim of this study is to determine fracture causes of GDC ceramics. GDC ceramics were prepared by sintering C_e09gd₀₁o₂ 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 language	English
Pages (from-to)	535-543
Number of pages	9
Journal	Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	77
Issue number	775
DOIs	https://doi.org/10.1299/kikaia.77.535
Publication status	Published - 2011
Externally published	Yes

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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title = "Analysis of fracture causes in gadolinia-doped ceria ceramics",

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.",

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AU - Uemura, Kazuhiro

AU - Yasuda, Kouichi

AU - Shiota, Tadashi

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AB - 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.

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KW - Fractography

KW - Material Flaw

KW - Solid Oxide Fuel Cell

KW - Strength

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Analysis of fracture causes in gadolinia-doped ceria ceramics

Abstract

Keywords

ASJC Scopus subject areas

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