Effects of temperature and microstructure on the elastic properties of selected Eu/sub 2/O/sub 3/--HfO/sub 2/ compositions

Journal Article · Thu Jan 01 04:00:00 EST 1976 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1976.tb09454.x· OSTI ID:7193540

Suchomel, R R; Hunter, O Jr

Europium sesquioxide is of interest as a control material for reactors because it has several large-cross-section isotopes which are formed successively on neutron capture. Elastic properties of Eu/sub 2/O/sub 3/ and selected Eu/sub 2/O/sub 3/-rich Eu/sub 2/O/sub 3/--HfO/sub 2/ compositions were investigated by the sonic technique from room temperature to 1500/sup 0/C. Sintered monoclinic Eu/sub 2/O/sub 3/ was found to have anomalously low room temperature moduli and to exhibit hystersis on thermal cycling. Fine-grained hot-pressed Eu/sub 2/O/sub 3/, as well as sintered specimens that contained at least 6 mol percent HfO/sub 2/, did not exhibit these anomalous characteristics.

• Research Organization: Ames Lab., IA
• OSTI ID: 7193540
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 59:3-4; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
BINARY MIXTURES
CHALCOGENIDES
CONTROL ELEMENTS
CRYSTAL STRUCTURE
DISPERSIONS
ELASTICITY
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
GRAIN SIZE
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
HYSTERESIS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MIXTURES
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
REACTOR COMPONENTS
SINTERED MATERIALS
SIZE
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
THERMAL CYCLING
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE