Microcracking of Eu/sub 2/O/sub 3/--Ta/sub 2/O/sub 5/ bodies
Journal Article
·
· J. Am. Ceram. Soc.; (United States)
Europium sesquioxide is of interest as a control material for reactors because it has several large-cross-section isotopes which form successively on neutron capture. Pure monoclinic Eu/sub 2/O/sub 3/ tends to grow large grains during sintering, causing microcracks to develop and leading to anomalous mechanical prperties. The effect of doping the Eu/sub 2/O/sub 3/ with the grain growth suppressant Ta/sub 2/O/sub 3/ was determined using studies of the elastic properties and internal friction by the sonic resonance technique. Compositions with <3 at.% Ta cation substitution had anomalously low room temperature elastic moduli values and showed a hysteresis on thermal cycling. These specimens also had high internal frictions. The finer-grained specimens which resulted when the dopant level exceeded 3 at.% Ta did not show these anomalous characteristics.
- Research Organization:
- Iowa State Univ., Ames
- OSTI ID:
- 6376790
- Journal Information:
- J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 61:7-8; ISSN JACTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of microstructure on the elastic properties of selected Ta2O5--Eu2O3 compositions.
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Thesis/Dissertation
·
Wed Jun 01 00:00:00 EDT 1977
·
OSTI ID:6694051
Effects of temperature and microstructure on the elastic properties of selected Eu/sub 2/O/sub 3/--HfO/sub 2/ compositions
Journal Article
·
Wed Dec 31 23:00:00 EST 1975
· J. Am. Ceram. Soc.; (United States)
·
OSTI ID:7193540
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· J. Am. Ceram. Soc.; (United States)
·
OSTI ID:6511177
Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220400 -- Nuclear Reactor Technology-- Control Systems
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
BARYON REACTIONS
CAPTURE
CHALCOGENIDES
CONTROL ELEMENTS
CRACKS
CRYSTAL STRUCTURE
DOPED MATERIALS
ELASTICITY
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
FABRICATION
FRICTION
GRAIN GROWTH
HADRON REACTIONS
INTERNAL FRICTION
MECHANICAL PROPERTIES
MICROSTRUCTURE
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
REACTOR COMPONENTS
SINTERING
TANTALUM COMPOUNDS
TANTALUM OXIDES
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YOUNG MODULUS
220400 -- Nuclear Reactor Technology-- Control Systems
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
BARYON REACTIONS
CAPTURE
CHALCOGENIDES
CONTROL ELEMENTS
CRACKS
CRYSTAL STRUCTURE
DOPED MATERIALS
ELASTICITY
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
FABRICATION
FRICTION
GRAIN GROWTH
HADRON REACTIONS
INTERNAL FRICTION
MECHANICAL PROPERTIES
MICROSTRUCTURE
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
REACTOR COMPONENTS
SINTERING
TANTALUM COMPOUNDS
TANTALUM OXIDES
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YOUNG MODULUS