High-temperature deformation of stoichiometric /sup 239/PuO/sub 2/

Conference · Sat Mar 01 00:00:00 EST 1980 · J. Am. Ceram. Soc.; (United States)

OSTI ID:5315037

Petrovic, J J; Land, C C

The deformation behavior of stoichiometric /sup 239/PuO/sub 2/ was examined at 800/sup 0/ to 1500/sup 0/C, using direct and diametral compression. Maximum ductility was observed at 1000/sup 0/C, but above this temperature both strength and ductility decreased and the fracture mode changed from transgranular to intergranular. The deformation activation energy measured at 1000/sup 0/C was 598 kJ/mol. Comparison to the deformation behavior of hypostoichiometric /sup 239/PuO/sub 2-x/ suggests that high-temperature dislocation motion becomes more difficult with increasing O/Pu ratio due to effects of stoichiometry on diffusion rates. Deformation mechanisms in /sup 239/PuO/sub 2/ appear to be a combination of dislocation motion and grain-boundary sliding.

• Research Organization: Los Alamos Scientific Lab., NM
• OSTI ID: 5315037
• Journal Information: J. Am. Ceram. Soc.; (United States), Vol. 63:3-4; Conference: 81. annual meeting of the American Ceramic Society, Cincinnati, OH, USA, 30 Apr 1979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
30 DIRECT ENERGY CONVERSION
PLUTONIUM DIOXIDE
DEFORMATION
ACTIVATION ENERGY
COMPRESSION
DUCTILITY
GRAIN BOUNDARIES
MICROSTRUCTURE
PLUTONIUM 239
STOICHIOMETRY
STRAIN RATE
STRESSES
THERMOELECTRIC GENERATORS
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
CHALCOGENIDES
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
ENERGY
EVEN-ODD NUCLEI
HEAVY NUCLEI
ISOTOPES
MECHANICAL PROPERTIES
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM ISOTOPES
PLUTONIUM OXIDES
RADIOISOTOPES
TENSILE PROPERTIES
TRANSURANIUM COMPOUNDS
YEARS LIVING RADIOISOTOPES
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties
300303 - Thermoelectric Generators- Materials
Components
& Auxiliaries