Crack Growth along Interfaces in Porous Ceramic Layers

Bent F. Sørensen, Andy Horsewell

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    Abstract

    Crack growth along porous ceramic layers was studied experimentally. Double cantilever beam sandwich specimens were loaded with pure bending moments to obtain stable crack growth. The experiments were conducted in an environmental scanning electron microscope enabling in situ observations of various mechanisms associated with crack growth. The macroscopic fracture energy of the interface between dense lanthanum strontium chromite and a porous lanthanum strontium manganite was measured to lie in the range of 1.4-3.8 J/m(2). Several micromechanisms were observed ahead of, or in the wake of, the crack tip. The measured variation of the fracture energy along the crack length may be attributed to such phenomena.
    Original languageEnglish
    JournalJournal of the American Ceramic Society
    Volume84
    Issue number9
    Pages (from-to)2051-2059
    ISSN0002-7820
    DOIs
    Publication statusPublished - Sep 2001

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