MATERIALS FOR HIGH TEMPERATURE NUCLEAR ENGINEERING APPLICATIONS. Summary Report No. 2, July 1, 1962 to June 1, 1963

Technical Report · Sat Jun 01 04:00:00 EDT 1963

OSTI ID:4691360

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

The compressive strength, bulk density, and porosity of slip-cast fused silica were measured as a function of firing conditions under air and steam conditions. Methods were developed for the determination of several activation energies characterizing transport processes in the firing of slip-cast fused silica. fnalysis of the early devitrification process duririg firing of slip-cast fused silica indicated that the cristobalite content should vary with the cube of firing time. A study was made of the influences of pressure application and mold vibration on casting of fused silica slip. A statistical study was made of the effects of 0.1 and 1 wt % additions of Baymal on the reaction characteristics of Al--U/sub 3/O/sub 8/ composites. The effects of U/sub 3/O/sub 8/ particle size were studied in Al-U/sub 3/O/sub 8/ composites. One differential thermal analysis furnace was converted to chromel-- alumel thermocouples to give increased sensitivity. Differential thermal analysis was applied to these pellets using various standards. Metallographic examination of fired ATR specimens was begun. Rough determinations were made of the loadbearing capability of ATR composites at elevated temperatures. A high-temperature x-ray- diffraction system was constructed to permit investigation of Al- U/sub 3/O/sub 8/ reaction kinetics. Initial studies were made to compare reactions in cold- pressed Al-U/sub 3/O/sub 8/ pellets with those of cold pressed Al-- UO/sub 2/ pellets. (N.W.R.)

• Research Organization: Georgia Inst. of Tech., Atlanta. Engineering Experiment Station
• NSA Number: NSA-17-032488
• OSTI ID: 4691360
• Report Number(s): TID-19057
• Country of Publication: United States
• Language: English

Related Subjects

AIR
ALUMINUM
ATOMIC MODELS
ATOMS
BORN APPROXIMATION
BUILDING MATERIALS
CASTING
COLD WORKING
COMBUSTION
CRISTOBALITE
CROSS SECTIONS
CRYSTALLIZATION
DENSITY
DIFFRACTION
DTA
ELECTRONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
EXPANSION
FABRICATION
FURNACES
GRAIN SIZE
HIGH TEMPERATURE
HYDROGEN
INTERACTIONS
MELTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
MINERALS
NUMERICALS
PELLETS
PERTURBATION THEORY
PLANNING
POROSITY
PRESSURE
QUANTUM MECHANICS
REACTION KINETICS
REACTORS
REPORT
SCATTERING
SILICON OXIDES
STEAM
TEMPERATURE
TENSILE PROPERTIES
THERMOCOUPLES
U3O8
URANIUM DIOXIDE
USES
VIBRATIONS
X RADIATION