X-ray absorption spectroscopy characterization of embedded and extracted nano-oxides

JOURNAL OF ALLOYS AND COMPOUNDS

卷:699

Article

Stan, Tiberiu¹  Sprouster, David J.²  Ofan, Avishai²  Odette, G. Robert¹  Ecker, Lynne E.²  Charit, Indrajit³ 

[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[2] Brookhaven Natl Lab, Nucl Sci & Technol Dept, Upton, NY 11973 USA

[3] Univ Idaho, Chem & Mat Engn Dept, Moscow, ID 83844 USA

关键词: Nanostructured materials;    Nuclear reactor materials;    Synchrotron radiation;    EXAFS;   

DOI  :  10.1016/j.jallcom.2016.12.350

来源: Elsevier

【 摘 要 】

The chemistries and structures of both embedded and extracted Y-Ti-O nanometer-scale oxides in a nanostructured ferritic alloy (NFA) were probed by x-ray absorption spectroscopy (XAS). Y2Ti2O7 is the primary embedded phase, while the slightly larger extracted oxides are primarily Y2TiO5. Analysis of the embedded nano-oxides is difficult partly due to the multiple Ti environments associated with different oxides and those still residing in matrix lattice sites. Thus, bulk extraction followed by selective filtration was used to isolate the larger Y2TiO5 oxides for XAS, while the smaller predominant embedded phase Y2Ti2O7 oxides passed through the filters and were analyzed using the log-ratio method. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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