SELF-DIFFUSION OF URANIUM IN THE /cap beta/ PHASE

Journal Article · Thu Oct 01 04:00:00 EDT 1959 · J. Nuclear Materials

DOI:https://doi.org/10.1016/0022-3115(59)90026-1· OSTI ID:4221181

Adda, Y; Kirianenko, A; Mairy, C

The self-diffusion of U in the beta phase was studied using couples of natural U and U/sup 234/ -enriched U. Cylinders 10 mm in diam. were pressed end- to-end at 600 deg C in vacuum for 1 hr, then heat treated at the temperatures of the experiment for 400 hrs. The samples were then sectioned and penetration- concentration curves were plotted from alpha counting data. Diffusion coefficients determined from these curves are (in cm/sup 2/sec): 5.1 x 10/sup -12/ at 700 deg C, 7.9 x 10/sup -12/ at725 deg C 1.1 x 10/sup -11/ at74O deg C and 1.6 x 10/sup -11/ at 755 deg C. The existence of covalent bonds is indicated, which explains the observed sharp increase in activation energy of self-diffusion. (T.R.H.)

• Research Organization: Centre d'Etudes Nucleaires, Saclay, France
• NSA Number: NSA-14-004571
• OSTI ID: 4221181
• Journal Information: J. Nuclear Materials, Journal Name: J. Nuclear Materials Vol. Vol: 1
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ACTIVATION
ALLOTROPY
ALPHA DETECTION
DIAGRAMS
DIFFUSION
ENERGY
HEAT TREATMENTS
HIGH TEMPERATURE
METALS, CERAMICS, AND MATERIALS
PRESSURE
QUANTITY RATIO
TUBES
URANIUM
URANIUM 234
VACUUM