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Review of self-irradiation effects in Pu-substituted zirconolite

Journal Article · · Am. Ceram. Soc. Bull.; (United States)
OSTI ID:6954604

Self-irradiation effects due to alpha decay in Pu-substituted zirconolite (CaPuTi/sub 2/O/sub 7/) have been assessed by dilatometry, TEM, microindentation testing, and differential thermal analysis. The crystalline material became metamict as a result of accumulation of alpha recoil tracks, with accompanying swelling, reduction of hardness, and increase in fracture toughness. Storage at elevated temperature partially or wholly suppressed metamictization. Studies of recovery from the metamict state showed that ease of crystallization depends on extend of prior damage and that heavy damage reduces the amount of stored energy. These results are interpreted in terms of competition between damage accumulation and annealing, variations within the metamict state, and the role of a heterogeneous microstructure.

Research Organization:
Los Alamos National Lab., Los Alamos, NM 87545
OSTI ID:
6954604
Journal Information:
Am. Ceram. Soc. Bull.; (United States), Journal Name: Am. Ceram. Soc. Bull.; (United States) Vol. 65:8; ISSN ACSBA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALPHA DECAY
ANNEALING
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
CRYSTALLIZATION
DAMAGE
DECAY
DIFFERENTIAL THERMAL ANALYSIS
DILATOMETRY
ELECTRON MICROSCOPY
FRACTURE PROPERTIES
HARDNESS
HEAT TREATMENTS
IRON COMPOUNDS
IRON OXIDES
IRRADIATION
MECHANICAL PROPERTIES
METAMICT STATE
MICROSCOPY
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
PLUTONIUM COMPOUNDS
RADIATION EFFECTS
STORAGE
SWELLING
TEMPERATURE EFFECTS
THERMAL ANALYSIS
THORIUM COMPOUNDS
THORIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
TRANSURANIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
ZIRCONOLITE