Variation of microstructures in oxidatively sintered UO2 and UO2-5wt%CeO2 pellet during resintering
- 1. KAERI, Taejon (Korea, Republic of)
Description
Variation of the microstructure and pore size distribution in UO2 and UO2-5wt%CeO2 sintered at oxidizing atmosphere and then resintered in reducing atmosphere was observed. The densities of UO2 and UO2-5wt%CeO2 sintered at CO2/H2 atmosphere(two stage) was decreased to 1.8%T.D. and 3.5%T.D., respectively, and those of the pellets sintered at H2/CO2/H2(three stage) was increased to 1.4%T. D. and 1.6%T. D. after resintering, respectively. The grain size of the pellets sintered with three stage was larger than that of the pellets sintered with two stage, and that of these two types of pellet was not increased after resintering. But, the grain size of UO2-5wt%CeO2 pellet sintered at reducing atmosphere was increased to about 2 times after resintering. The large density drop by resintering is due to a formation of microcracks longer than 10μm, related to trapped CO2 sintering
Additional details
Publishing Information
- Publisher
- KNS
- Imprint Place
- Taejon (Korea, Republic of)
- Imprint Title
- Proceedings of the KNS autumn meeting
- Imprint Pagination
- [CD-ROM]
- Journal Page Range
- [8 p.]
Conference
- Title
- 2000 autumn meeting of the KNS
- Dates
- 26-27 Oct 2000
- Place
- Taejon (Korea, Republic of)
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 34050567
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- CESIUM OXIDES; DENSITY; FUEL PELLETS; MICROSTRUCTURE; SINTERED MATERIALS; SINTERING; URANIUM DIOXIDE
- Descriptors DEC
- ACTINIDE COMPOUNDS; ALKALI METAL COMPOUNDS; CESIUM COMPOUNDS; CHALCOGENIDES; FABRICATION; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PELLETS; PHYSICAL PROPERTIES; URANIUM COMPOUNDS; URANIUM OXIDES
Optional Information
- Notes
- 6 refs, 6 figs