Abstract
The effects of self-radiation damage on microstructure and fracture properties in Cm-doped Ca 2Nd 8(SiO 4) 6O 2 were investigated. The macroscopic swelling increased exponentially with dose to a saturation value of 8.45%, slightly higher than in previous work with lower density specimens. The radiation-induced microstructure consisted of individual amorphous tracks, from both alpha-recoil particles and fission fragments, which eventually overlapped to produce a completely amorphous state at 13.1 × 10 24 alpha decays/m 3. Electron-beam-recrystallization of the amorphous state resulted in the formation of submicron crystallites. The radiation-induced swelling and amorphization increased the fracture toughness.
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