Structural properties of MgO and MgAl/sub 2/O/sub 4/ after fission neutron irradiation near room temperature
Conference
·
OSTI ID:6160349
Polycrystalline MgO and MgAl/sub 2/O/sub 4/ samples were irradiated at 430 +- 5 K in HFIR to a fast neutron fluence of 2.1 x 10/sup 26/ n/m/sup 2/, E > 0.2 MeV, and 4.6 x 10/sup 26/ thermal n/m/sup 2/. Following irradiation, swelling, microstructure and mechanical strength were evaluated relative to control samples. Both materials swelled substantially, 2.6-3.0% in the case of MgO, and 0.8% in the case of MgAl/sub 2/O/sub 4/. The substructure of the MgO was found to contain a dense array of dislocation loops while the spinel showed heavy but unresolved damage. Results of mechanical strength evaluation by diametral compression testing showed significant strengthening for both materials. This result, which has important implications for use of cubic technological ceramics, is discussed in terms of the observed fracture modes and microstructural damage.
- Research Organization:
- Los Alamos National Lab., NM (USA); Case Western Reserve Univ., Cleveland, OH (USA); Savannah River Ecology Lab., Aiken, SC (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6160349
- Report Number(s):
- LA-UR-81-2078; CONF-810831-6; ON: DE81028770
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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· Journal of the American Ceramic Society
·
OSTI ID:483670
Related Subjects
36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARYON REACTIONS
CHALCOGENIDES
CRYSTAL STRUCTURE
HADRON REACTIONS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
MICROSTRUCTURE
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SWELLING
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARYON REACTIONS
CHALCOGENIDES
CRYSTAL STRUCTURE
HADRON REACTIONS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
MICROSTRUCTURE
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SWELLING