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Deformation Behavior of UO 2 Above 2000°C.
Author(s) -
SLAGLE O. D.
Publication year - 1984
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.1151-2916.1984.tb19735.x
Subject(s) - creep , activation energy , arrhenius equation , materials science , extrapolation , atmospheric temperature range , exponent , deformation (meteorology) , stress (linguistics) , composite material , thermodynamics , chemistry , physics , mathematics , mathematical analysis , linguistics , philosophy
The creep of UO 2 under uniaxial, compressive loads was measured in the temperature range from 2100°C to 2600°C at stresses from 2 to 21 MPa. For T > 2100°C, the results indicate an enhancement in creep rate over that predicted from an extrapolation of reported lower‐temperature data. The high‐temperature creep data can be described by an Arrhenius relationship with an activation energy of 1250 kJ/mol. The stress dependence of the creep rate can be expressed as a logarithmic relationship with a stress exponent that decreases from 6.5 at 2100°C to 3.5 at 2600°C.