Bending creep test to measure the viscosity of porous materials during sintering

Sang Ho Lee, Gary L. Messing, David J. Green

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

A bending creep test is proposed for measuring the change in viscosity of a porous material during densification. Equations, based on simple beam deflection theory, were derived to obtain the viscosity from a series of loading experiments using rectangular samples of different densities. By measuring the deflection in the center of the specimen between the spans, the viscosity of a porous material during densification can be measured. Experiments with porous Y2O3-stabilized ZrO2 beams were used to illustrate the bending creep test. Consistent with theory the viscosity increased from 50 to 400 GPa·s as the sample densified from 87% to 98% density. The rapid increase in viscosity was considered to be a result of both densification and grain growth.

Original languageEnglish (US)
Pages (from-to)877-882
Number of pages6
JournalJournal of the American Ceramic Society
Volume86
Issue number6
DOIs
StatePublished - Jun 2003

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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