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MATERIALS FOR HIGH TEMPERATURE NUCLEAR ENGINEERING APPLICATIONS. Quarterly Report No. 3, October 1, 1962 to January 1, 1963

Technical Report ·
OSTI ID:4740258
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A statistical study was made to determine the effects of the time allowed for thermal equilibration in the hightemperature ring tensile test of slip-cast fused silica. The study consisted of three firings; the rings from each firing being broken at 2000 nif- F after soaking times ranging from 3 to about 25 min. The statistical analysis of the breaking loads showed variations between firings at greater than the 99% confidence level. Variations between soaking times failed to show significance at the 95% confidence level. No evidence was detected of an interaction between the two factors. Studies of the Al --U/sub 3/O/sub 8/ reactions in a rolled plate of ATR composition containing 33.79 wt% U/sub 3/O/sub 8/, 66.07 wt% X-800 Al and 0.14 wt% B/sub 4/C were initiated. Plate ATR specimens were subjected to x-ray diffraction in the asreceived condition, after being heated to 1000, 1200, 1400, 1600, and 1830 nif- F, and after vacuum annealing. Both Al and U/sub 3/O/sub 8/ showed consistent diffraction decreases with increasing severity of heating. Metallographic examination of the ATR specimens indicated formation of a reaction zone, probably principally Al/sub 2/O/sub 3/, around the U/sub 3/O/sub 8/ which were converted to a fragmented structure. Studies were also initiated to compare the reactions in cold pressed AlUO/sub 2/ pellets with those in cold pressed Al-U/ sub 3/O/sub 8/ pellets. (J.R.D.)
Research Organization:
Georgia Inst. of Tech., Atlanta. Engineering Experiment Station
NSA Number:
NSA-17-018718
OSTI ID:
4740258
Report Number(s):
TID-18286
Country of Publication:
United States
Language:
English

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Related Subjects

ALUMINUM ALLOYS
ALUMINUM OXIDES
ANNEALING
BEARINGS
BORON CARBIDES
CASTING
CHEMICAL REACTIONS
COLD WORKING
COMBUSTION
COMPACTING
DEFECTS
DIFFRACTION
HEAT TREATMENTS
HEATING
HIGH TEMPERATURE
MATERIALS TESTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
PELLETS
SILICON OXIDES
SLIP
STATISTICS
TENSILE PROPERTIES
THERMODYNAMICS
URANIUM OXIDES
VACUUM
X RADIATION
ZONES