کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1607557 | 1516240 | 2015 | 11 صفحه PDF | دانلود رایگان |
• Structural stability of La1-xYbxPO4 was studied using glancing angle XANES.
• Loss of short- and long-range order in La1-xYbxPO4 due to ion-implantation observed.
• High dose of Au− ions induced partial recrystallization of YbPO4 and La0.3Yb0.7PO4.
• Glancing angle XANES spectra were sensitive to changes in the structure.
• Annealing was found to result in the recrystallization of the damaged structure.
Synthetic analogues of naturally occurring monazite (REPO4; RE = La to Gd) and xenotime (RE′PO4; RE′ = Tb to Lu and Y) minerals have been identified as potential wasteforms for nuclear waste. High energy ion-implantation of crystalline materials simulates radiation-induced structural damage and allows for the radiation resistance of a crystal structure to be probed. The structural stability of Au− ion-implanted La1-xYbxPO4 materials was investigated using micro-X-ray diffraction (μ-XRD) and glancing angle X-ray absorption near-edge spectroscopy (GA-XANES) in this study. The long- and short-range order of La1-xYbxPO4 (x = 0, 0.3, 0.7, 1.0) is affected by ion-implantation and, thus, the materials are prone to structural damage. The structures of some members of the La1-xYbxPO4 series (x = 0.7 and 1.0) were observed to partially recover after being implanted with Au− ions to a high dose. The structures of all members of the La1-xYbxPO4 series were observed to recover from damage resulting from ion-implantation after annealing the materials at temperatures ≥300 °C.
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Journal: Journal of Alloys and Compounds - Volume 653, 25 December 2015, Pages 279–289