Solid Phase Transitions in the UO2-ZrO2 System
- North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
Several aspects of the UO2-ZrO2 system have been studied and the following conclusions reached: 1) At 2300° C, the UO2-ZrO2 system consists of a homogeneous phase extending from 0 to 100 m/o ZrO2. The crystal structure of this phase changes in a continuous manner from cubic to tetragonal with increasing ZrO2 content. The lowest ZrO2 concentration at which the structure has been recognized as tetragonal lies between 53 and 54 m/o. 2) The temperature at which pure ZrO2 transforms from a monoclinic to a tetragonal structure is lowered drastically by additions of UO2. 3) The existence of a cubic high-temperature modification of ZrO2 appears unlikely.
- Research Organization:
- North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(11-1)-GEN-8
- NSA Number:
- NSA-12-013219
- OSTI ID:
- 4326735
- Report Number(s):
- NAA-SR--2538
- Country of Publication:
- United States
- Language:
- English
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