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Creep of CaO‐Stabilized ZrO 2
Author(s) -
STJACQUES R. G.,
ANGERS R.
Publication year - 1972
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/j.1151-2916.1972.tb13439.x
Subject(s) - creep , materials science , activation energy , grain boundary sliding , crystallite , grain boundary , grain size , diffusion creep , composite material , diffusion , mineralogy , metallurgy , thermodynamics , microstructure , chemistry , physics
The compressive creep of 18 mol% CaO‐stabilized ZrO 2 was studied at 1200° to 1400°C and 500 to 4000 psi. The specimens were polycrystalline with grain diameters from 7 to 29 μm. The activation energy for creep is 94 kcal/mol, and the creep rates are linearly proportional to the stress and to the inverse of the grain size. These results lead to the conclusion that creep in 18 mol% CaO‐stabilized ZrO 2 may be controlled by cation diffusion associated with grain‐boundary sliding.