Abstract
Radiation effects in a wide range of pyrochlore compositions have been extensively investigated due to the potential application of pyrochlores as host matrices for the immobilization of actinides – particularly Pu. In this study, we have performed 1.0MeV Kr2+ ion implantations in bulk samples of single crystal Gd2Ti2O7 at room temperature at different ion fluences of 1.875, 3.125 and 5×1014ions/cm2. The microstructural evolution upon ion-beam implantation was examined by cross-sectional transmission electron microscopy (TEM). The critical amorphization dose at room temperature for 1MeV Kr2+ implanted Gd2Ti2O7 was determined to be ∼0.143dpa, which is significantly lower than the dose obtained by ion-irradiation under in situ TEM observation.
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