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Low pressure dependent elasticity of porous ceramics
Author(s) -
Karunarathne Ashoka,
Jodha Kartikeya S.,
Priyadarshan Gautam,
Griggs Jason A.,
Gladden Joseph R.
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16751
Subject(s) - porosity , elasticity (physics) , materials science , cubic zirconia , composite material , ceramic , hydrostatic pressure , porous medium , hydrostatic equilibrium , sintering , mineralogy , thermodynamics , chemistry , physics , quantum mechanics
The primary goal of this study was to characterize the influence of the pore‐saturated gas media and their physical properties on the elasticity of porous ceramic materials. Resonant ultrasound spectroscopic measurements were performed on test specimens of alumina with ~40% porosity, zirconia with ~48% porosity, and sintered fully dense zirconia to determine the hydrostatic pressure‐dependent macroscopic elasticity. Here, we report the variation of elasticity of porous and full dense samples over approximately five orders of magnitude (800‐0.02 psi) in absolute pressure. The time evolution of mechanical equilibrium of the porous materials at low pressure and high‐temperature conditions will also be discussed.