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

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

Research output: Contribution to journalArticle

46 Citations (Scopus)

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 - Jan 1 2003

Fingerprint

creep
Porous materials
Creep
Sintering
viscosity
Viscosity
Densification
deflection
Grain growth
experiment
Experiments
test
sintering
material
measuring

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

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Bending creep test to measure the viscosity of porous materials during sintering. / Lee, Sang Ho; Messing, Gary Lynn; Green, David J.

In: Journal of the American Ceramic Society, Vol. 86, No. 6, 01.01.2003, p. 877-882.

Research output: Contribution to journalArticle

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