Characterization of sintering of gelled UO3 microspheres
- 1. Atomic Energy Establishment, Cairo (Egypt). Metallurgy Dept.
- 2. Cairo Univ. (Egypt). Faculty of Engineering
Description
Several processes have been developed for the fabrication of UO3 microspheres which can be used as fuel material in different types of nuclear reactors. UO3 microspheres, prepared using an internal gelation process, were reduced and sintered. Hydrogen and argon atmospheres were used at temperatures ranging from 1100 deg C to 1400 deg C for different durations. It was found that the sintered density is higher for spheres reduced at 700 deg C than at any other reduction temperature. Lower densities were achieved in argon atmosphere than in hydrogen for the same sintering and reduction temperature. More than 98% Th.D. could be obtained by calcining the UO3 spheres at 400 deg C for 1 hr, reducing at 700 deg C and then sintering at 1400 deg C for 2 hrs in hydrogen atmosphere. (author) 17 refs.; 7 figs
Additional details
Publishing Information
- Journal Title
- Journal of Thermal Analysis
- Journal Volume
- 35
- Journal Issue
- 5
- Series
- J. Therm. Anal.
- Journal Page Range
- 1405-1412
- ISSN
- 0368-4466
- CODEN
- JTHEA
INIS
- Country of Publication
- Hungary
- Country of Input or Organization
- Hungary
- INIS RN
- 21092929
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ARGON; CALCINATION; DENSITY; GELATION; HYDROGEN; REDUCTION; SHRINKAGE; SINTERING; SPHERES; TEMPERATURE DEPENDENCE; URANIUM TRIOXIDE; VERY HIGH TEMPERATURE
- Descriptors DEC
- ACTINIDE COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; DECOMPOSITION; ELEMENTS; FABRICATION; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PYROLYSIS; RARE GASES; URANIUM COMPOUNDS; URANIUM OXIDES