Author/Authors :
Gregg، نويسنده , , Daniel J. and Karatchevtseva، نويسنده , , Inna and Thorogood، نويسنده , , Gordon J. and Davis، نويسنده , , Joel and Bell، نويسنده , , Benjamin D.C. and Jackson، نويسنده , , Matthew and Dayal، نويسنده , , Pranesh and Ionescu، نويسنده , , Mihail and Triani، نويسنده , , Gerry and Short، نويسنده , , Ken and Lumpkin، نويسنده , , Gregory R. and Vance، نويسنده , , Eric R.، نويسنده ,
Abstract :
Ceramics with the sodium zirconium phosphate or NZP type structure have potential as nuclear waste form and inert matrix materials. For both applications the material will be subjected to self-radiation damage from α-decay of the incorporated actinides. In this study, ion-beam irradiation using Au- and He-ions has been used to simulate the consequences of α-decay and the effects of irradiation on the structural and macroscopic properties (density and hardness) have been investigated. Irradiation by Au-ions resulted in a significant volume contraction of ∼7%, a reduction in hardness of ∼30% and a loss in long-range order at fluences above 1014 Au-ions/cm2. In contrast, little effect on the material properties was noted for samples irradiated with He-ions up to a fluence of 1017 ions/cm2. Thermal annealing was investigated for the highest fluence Au-ion irradiated sample and significant decomposition was observed.
