Slow crack growth behavior in Si3N4 sintered with Yb2Si2O7 tie-line composition additives

Heon Jin Choi, Hyeong Jong Kim, June Gunn Lee, Young Wook Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Slow crack growth behavior of two gas pressure sintered Si3N4 ceramics with different additives; a Yb2Si2O7 composition and an A12O3-Y2O3 composition, was investigated by constant stress-rate ("dynamic fatigue") testing at 1400°C. The slow crack growth parameter, n, was 14.7 and 6.3 for Si3N4 with Yb2Si2O7 and AI2O3-Y2O3 compositions, respectively. Superior crack growth resistance of Si3N4 with Yb2Si2O7 composition was due to its higher refractoriness of intergranular glassy films, compared to Si3N4 with A12O3-Y2O3 composition.

Original languageEnglish
Pages (from-to)471-475
Number of pages5
JournalJournal of the European Ceramic Society
Volume21
Issue number4
DOIs
Publication statusPublished - 2001 Apr 1

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Crack propagation
Chemical analysis
Fatigue testing
Gases
silicon nitride

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Choi, Heon Jin ; Kim, Hyeong Jong ; Lee, June Gunn ; Kim, Young Wook. / Slow crack growth behavior in Si3N4 sintered with Yb2Si2O7 tie-line composition additives. In: Journal of the European Ceramic Society. 2001 ; Vol. 21, No. 4. pp. 471-475.
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Slow crack growth behavior in Si3N4 sintered with Yb2Si2O7 tie-line composition additives. / Choi, Heon Jin; Kim, Hyeong Jong; Lee, June Gunn; Kim, Young Wook.

In: Journal of the European Ceramic Society, Vol. 21, No. 4, 01.04.2001, p. 471-475.

Research output: Contribution to journalArticle

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