MATERIALS FOR HIGH TEMPERATURE NUCLEAR ENGINEERING APPLICATIONS. Quarterly Report No. 2, July 1 to October 1, 1962

Technical Report · Thu Oct 31 04:00:00 EST 1963

OSTI ID:4735219

Fleming, J D; Johnson, J W; Boland, P; Bomar, S H; Colcord, A R

More detailed studies were made of the effects of steam on the firing behavior of slip-cast fused silica. The results of this firing profile study were highly erratic and indicated that the tube furnace was not suitable for steam firing. Determination of the compressive strength of slipcast fused silica was completed. The maximum compressive strength ranged from 21,000 psi at a firing temperature of 2100 deg F to 29,500 psi at 2300 deg F. The bulk density changes in slip-cast fused silica were expressed mathematically. An analysis indicated that the activation energy for sirtering of slip-cast fused silica is 68.6 kcal per mole. A statistical study was made of the effects of 0.1 and 1 wt% additions of Baymal on the ignltion characteristics of 14.6 wt% Al--U/sub 3/O/sub 8/ composites. The effects of U/sub 3/O/sub 8/ particle size were studied in 25 wt% Al--U/sub 3/O/sub 8/ composites. Only the --325 mesh U/sub 3/O/sub 8/ showed significartly differert igrition characteristics, yielding decreased ignition temperatures and increased differential thermal analysis peak areas. One differertial thermal analysis furnace was converted to chromel--alumel thermocouples to give increased sensitivity. Fifty wt% Al--U/sub 3/O/sub 8/ composites were pressed using dead-burned'' U/sub 3/O/sub 8/, and differential thermal analysis was applied to the pellets using various standards. (R.J.S.)

• Research Organization: Georgia Inst. of Tech., Atlanta. Engineering Experiment Station
• NSA Number: NSA-17-008814
• OSTI ID: 4735219
• Report Number(s): TID-17530
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM
BUILDING MATERIALS
COMBUSTION
DENSITY
DTA
EXPANSION
FIRING
FURNACES
FUSED SALTS
GRAIN SIZE
HEATING
HIGH TEMPERATURE
IMPURITIES
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
PELLETS
REPORT
SENSITIVITY
SILICON OXIDES
SINTERING
STEAM
TEMPERATURE
TENSILE PROPERTIES
THERMOCOUPLES
THERMODYNAMICS
TUBES
U3O8