APPLICATION OF ULTRAHIGH-PRESSURE HIGH-TEMPERATURE EQUIPMENT TO STUDY OF UO$sub 2$ REACTIONS
Equipment and techniques for high-pressure high temperature solid-state studies were developed, and some preliminary results for the reaction of uranium oxides with other oxidcs were obtaincd. A new die design was evolved which appears suitable for any work currently contemplated. The maximum capabilities of this new die are as yet undetermined, but its theoretical pressure limit is in excess of 200,000 atm. The die differs from similar equipment in that internal heating of the sample is employed and maximum pressure and temperature can be maintained simultaneously. Most of the preliminary work on materials synthesis was performed at pressures up to 40,000 atm. and temperatures to 1000 deg C. No reactions were found in the system UO/sub 2/ and U/sub 3/O/sub 8/ with BeO while under pressure. However, a reaction between Sc/sub 2/O/sub 3/ was detected which was not detected at normal pressure. Sc/sub 2/O/sub 3/ reacted with U/sub 3/O/ sub 8/ under pressure as it does at ambient pressure. A new high-pressure high- temperature phase of U/sub 3/O/sub 8/ was produced. Preliminary study of the U/ sub 3/O/sub 8/ pressuretemperature phase diagram was made. The crystal structure of the new U/ sub 3/O/sub 8/ phase has not yet been determined. (auth)
- Research Organization:
- Battelle Memorial Inst., Columbus, OH (United States)
- DOE Contract Number:
- W-7405-ENG-92
- NSA Number:
- NSA-13-011821
- OSTI ID:
- 4263829
- Report Number(s):
- BMI-1328
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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NUCLEAR ENGINEERING DEPARTMENT, PROGRESS REPORT, SEPTEMBER 1-DECEMBER 31, 1960
HIGH-PRESSURE HIGH-TEMPERATURE INVESTIGATION OF THE URANIUM-OXYGEN SYSTEM