Comment on 'dependence of ceramics fracture properties on porosity'

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Abstract

Wagh, Poeppel and Singh developed a 'connected-grain' model for describing the porosity dependence of modulus of elasticity in ceramics. They derived the relation E(p) = E 0 (1 - p) m where E(p) was the effective modulus of elasticity of a porous material, p was the volume fraction of porosity, E 0 was the modulus of the same material after full densification, and exponent m depended on the tortuosity of structure. It had a value of nearly 2 for sintered ceramics. In a later paper, relations were derived from the same postulates for other mechanical properties. The present paper shows a mistake in the derivations.

Original languageEnglish
Pages (from-to)32-33
Number of pages2
JournalJournal of Materials Science Letters
Volume15
Issue number1
DOIs
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Materials Science(all)

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