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 language | English (US) |
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Pages (from-to) | 877-882 |
Number of pages | 6 |
Journal | Journal of the American Ceramic Society |
Volume | 86 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2003 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry