Triple-layered, thick glassy grain boundaries in porous cordierite ceramics

K. Kaneko, N. Honbe, M. Matsumoto, Y. Yasutomi, T. Saitoh, Y. Takigawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Mechanical tests and microstructural investigations were performed on porous cordierite ceramics. Four-point bending tests were carried out both in air and in water. It was shown that the mechanical strength was strongly influenced by the experimental conditions. Triple-layered, thick amorphous grain boundaries were observed by high-resolution transmission electron microscopy. The composition of each layer as measured by energy dispersive X-ray spectroscopy was shown to be different. It is concluded that applying an external stress causes water-induced stress corrosion cracking preferentially occurring at the amorphous grain boundaries and at the triple grain junctions. This may have caused the dramatic decrease in the mechanical strength in water compared with that in air.

Original languageEnglish
Pages (from-to)597-604
Number of pages8
JournalActa Materialia
Volume50
Issue number3
DOIs
Publication statusPublished - Feb 8 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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