Creep of Mixed-Oxide Fuel Pellets at High Stress

Creep of Mixed-Oxide Fuel Pellets at High Stress

The rate of steady‐state compressive creep in (U,Pu)O2‐ε was investigated in the power‐law creep region (at a constant stress of 69 MN/m2 between 1600° and 1500°C) as a function of the oxygen‐to‐metal (O/M) ratio (1.88 to 1.995). The creep rate over this range is independent of the starting material...

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Veröffentlicht in:J. Amer. Ceram. Soc., v. 56, no. 6, pp. 330-333 v. 56, no. 6, pp. 330-333, 1973-06, Vol.56 (6), p.330-333
Hauptverfasser: ROUTBORT, J. L., VOGLEWEDE, J. C.
Format: Artikel
Sprache:eng
Schlagworte:
ACTIVATION ENERGY
BINARY MIXTURES
DEFECTS
DEFORMATION
DIFFUSION
DISLOCATIONS
FUEL PELLETS- STRESSES
MOTION
PLUTONIUM OXIDES- CREEP
PRESSURE DEPENDENCE
SUBSTOICHIOMETRY
URANIUM DIOXIDE- - CREEP
VERY HIGH PRESSURE
VERY HIGH TEMPERATURE
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container_issue 6
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container_title J. Amer. Ceram. Soc., v. 56, no. 6, pp. 330-333
container_volume 56
creator ROUTBORT, J. L.
VOGLEWEDE, J. C.
description The rate of steady‐state compressive creep in (U,Pu)O2‐ε was investigated in the power‐law creep region (at a constant stress of 69 MN/m2 between 1600° and 1500°C) as a function of the oxygen‐to‐metal (O/M) ratio (1.88 to 1.995). The creep rate over this range is independent of the starting material and decreases with increasing O/M ratio. The apparent activation energy for creep and the preexponential structure factor are sensitive functions of the O/M ratio, with approximately the same dependence on this ratio as these parameters measured at low stresses. These results imply that diffusion of the same defect species controls creep deformation in both the stress‐assisted diffusion region (ε∞σ) and the dislocation‐motion region (ε∞σ4.4).
doi_str_mv 10.1111/j.1151-2916.1973.tb12507.x
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source Wiley Online Library Journals Frontfile Complete; Periodicals Index Online
subjects ACTIVATION ENERGY
BINARY MIXTURES
DEFECTS
DEFORMATION
DIFFUSION
DISLOCATIONS
FUEL PELLETS- STRESSES
MOTION
PLUTONIUM OXIDES- CREEP
PRESSURE DEPENDENCE
SUBSTOICHIOMETRY
URANIUM DIOXIDE- - CREEP
VERY HIGH PRESSURE
VERY HIGH TEMPERATURE
title Creep of Mixed-Oxide Fuel Pellets at High Stress
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