Structural change in /sup 238/Pu-substituted zirconolite on recovery from the metamict state

Conference · Wed Jan 01 04:00:00 EST 1986 · Mater. Res. Soc. Symp. Proc.; (United States)

OSTI ID:5460474

Clinard, Jr, F W; Livak, R J; Hobbs, L W; Rohr, D L

/sup 238/Pu-substituted zirconolite (CaPuTi/sub 2/O/sub 7/) was held at = 350 K for a time sufficient to allow self-irradiation damage to convert the material to the metamict condition. Samples were then stored at 875 K, while dimensional and microstructural changes were monitored by dilatometry and transmission electron microscopy. Densification proceeded sporadically over a period of = 400 days, attaining a final value of 4 vol% as a result of crystallization. The material was found to be friable at an intermediate stage of recovery, apparently as a result of internal strains. Evidence is presented that CaPuTi/sub 2/O/sub 7/ can exist in more than one metamict state, depending on extent of prior damage and thermal history.

• Research Organization: Los Alamos National Lab., NM
• OSTI ID: 5460474
• Report Number(s): CONF-850995-
• Conference Information: Journal Name: Mater. Res. Soc. Symp. Proc.; (United States) Journal Volume: 50
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CRYSTALLOGRAPHY
ELECTRON MICROSCOPY
EVEN-EVEN NUCLEI
HEAVY NUCLEI
IRON COMPOUNDS
IRON OXIDES
ISOTOPES
METAMICT STATE
MICROSCOPY
MINERALS
NUCLEI
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
PLUTONIUM 238
PLUTONIUM ISOTOPES
RADIATION EFFECTS
RADIOISOTOPES
THORIUM COMPOUNDS
THORIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
YEARS LIVING RADIOISOTOPES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
ZIRCONOLITE