Crack propagation in SiCf/SiC ceramic matrix composite under static and cyclic loading conditions

S. Raghuraman, J. F. Stubbins, M. K. Ferber, A. A. Wereszczak

Research output: Contribution to journalArticle

Abstract

SiCf SiC ceramic matrix composite material is of high interest for potential application as a structural and barrier material in fusion systems. It possesses reasonable fracture toughness over a range of temperatures and, due to the low atomic number of its constituents, is appealing for low activation reasons. This study examines the mechanical durability of a Nicalon fiber-SiC composite which has been tested at temperatures up to 1400°C to determine its resistance to crack propagation under static and cyclic loading conditions. The crack growth characteristics are governed by the fiber and interface failure modes. These, in turn are affected by loading parameters, temperature and environmental effects. The material shows R-curve behavior, due to fiber bridging of the crack wake. The material also shows time dependent crack growth at elevated temperature, but not at room temperature. However, cyclic loading does induce crack extension at room temperature.

Original languageEnglish (US)
Pages (from-to)840-844
Number of pages5
JournalJournal of Nuclear Materials
Volume212-215
Issue numberPART 1
DOIs
StatePublished - Sep 1994

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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