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THE SYSTEM OF PuO$sub 2$-ZrO$sub 2$

Technical Report ·
OSTI ID:4806706
A study of the system PuO/sub 2/ ZrO/sub 2/ undertaken to provide a phase diagram, the initial prerequisite to fuel evaluation. The phase equilibria were studied by x-ray diffraction and metallographic techniques. A single-phase, face-centered cubic solid solution exists up to 80 mole% ZrO/sub 2/. The region from 80 to 99.8 mole% ZrO/sub 2/ consists of two phases: monoclinic ZrO/sub 2/ and a face-centered cubic PuO/sub 2/-80 mole% ZrO/sub 2/ solid solutlon. The transformation temperatures of the two-phase compositions increase with ZrO/sub 2/ concentration in a curvilinear fashion and reach a maximum temperature of l200 deg C at the pure component. The experimental liquidus was continuous throughout the entire composition range. An addition of 0.2 mole% PuO/sub 2/ dimensionally stabilizes monoclinic ZrO/sub 2/. (auth)
Research Organization:
General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
DOE Contract Number:
AT(45-1)-1350
NSA Number:
NSA-16-012093
OSTI ID:
4806706
Report Number(s):
HW-69305
Country of Publication:
United States
Language:
English

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