AN X-RAY STUDY OF OXIDIZED URANIUM SURFACES
BS>There appears to be a change in the character of the oxide formed on uranium between 400 and 500 deg C. At 400 deg C and below, the adherent oxide seems to contain an oxide higher than UO/sub 2/, possibilities being U/sub 3/O/ sub 7/, U/sub 4/O/sub 9/, a nd UO/sub 2.3/ At 500 and 600 deg C, the oxide seems to be a single UO/sub 2/ phase. When oxidation continues to such an extent that flaking of the oxide occurs, U/sub 3/O/sub 8/ forms but there is no evidence for the presence of U/sub 3/O/sub 8/ in thin adherent oxide films. This change in the oxide between 400 and 500 deg C coincides with a change that has been found in the oxidation rate law. It seems reasonable that this change in the oxide is responsible for the change in oxidation kinetics. (auth)
- Research Organization:
- Argonne National Lab., Ill.
- DOE Contract Number:
- W-31-109-ENG-38
- NSA Number:
- NSA-18-004200
- OSTI ID:
- 4127191
- Report Number(s):
- TID-18364; UAC-7170
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- United States
- Language:
- English
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