Ion beam irradiation effects in strontium zirconium phosphate with NZP-structure type

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• 作者：Daniel J. Gregg ; Inna Karatchevtseva ; Gordon J. Thorogood ; Joel Davis ; Benjamin D.C. Bell ; Matthew Jackson ; Pranesh Dayal ; Mihail Ionescu ; Gerry Triani ; Ken Short ; Gregory R. Lumpkin ; Eric R. Vance
• 刊名：Journal of Nuclear Materials
• 出版年：March, 2014
• 年：2014
• 卷：446
• 期：1-3
• 页码：224-231
• 全文大小：1268 K

文摘

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 伪-decay of the incorporated actinides. In this study, ion-beam irradiation using Au- and He-ions has been used to simulate the consequences of 伪-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 鈭?%, a reduction in hardness of 鈭?0% 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.