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Abstract

Specimens of Gd-2Ti-2O-7 and CaZrTi-2O-7 were doped with 244-Cm and the effects of self-radiation damage from alpha decay were determined as a function of cumulative dose. The macroscopic swelling of the specimens increased exponentially with dose to limiting (saturation) values of 5.1 and 6.0% for GD-2Ti-O7 and GaZrTi-2O-7, respectively. The radiation induced microstructure consists primarily of individual amorphous tracks from the alpha recoil particles which eventually overlap to produce an amorphous state at about 2.0x10**25 alpha decays/m**3. This radiation induced swelling and amorphization results in increased dissolution rate and fracture toughness, but decreased hardness. Both materials recrystallize in a sharp recovery stage. The stored energy release is 127 J/g and the activation energy for recrystallization in CaZrTi-2O-7 is estimated to be 5.8 eV.

Additional information

Authors: WEBER W J, PACIFIC NORTHWEST LABORATORY, RICHLAND, WA (USA);JRC - KARLSRUHE ESTAB. (GERMANY);WALD J W, PACIFIC NORTHWEST LABORATORY, RICHLAND, WA (USA);JRC - KARLSRUHE ESTAB. (GERMANY);MATZKE HJ PACIFIC NORTHWEST LABORATORY, RICHLAND, WA (USA), PACIFIC NORTHWEST LABORATORY, RICHLAND, WA (USA);JRC - KARLSRUHE ESTAB. (GERMANY);JRC - KARLSRUHE ESTAB. (GERMANY), PACIFIC NORTHWEST LABORATORY, RICHLAND, WA (USA);JRC - KARLSRUHE ESTAB. (GERMANY)
Bibliographic Reference: JOURNAL OF NUCLEAR MATERIALS, VOL. 138 (1986), PP. 196-209
Record Number: 1989124139900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en