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|Title:||Structure of UC2 and U2C3: XRD, 13C NMR and Exafs Study|
|Authors:||CARVAJAL NUNEZ URSULA; ELOIRDI Rachel; PRIEUR DAMIEN; MARTEL LAURA; LOPEZ HONORATO Eddie; FARNAN I.; VITOVA T.; SOMERS Joseph|
|Citation:||JOURNAL OF ALLOYS AND COMPOUNDS vol. 589 p. 234-239|
|Publisher:||ELSEVIER SCIENCE SA|
|Type:||Articles in periodicals and books|
|Abstract:||In this study, uranium dicarbide (UC2) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U2C3) in the presence of a second phase UC2-z. Both samples, as cast and heat treated, have been characterised by chemical analyses, X-ray diffraction (XRD), 13C magic angle spinning nuclear magnetic resonance (MAS-NMR) and by extended X-ray absorption fine structure (EXAFS). The composition, the purity, the various environments of both U and C atoms as well as the bonds length with the coordination number have been determined. By combining a long-range order method (XRD) and short-range order spectroscopy techniques (EXAFS and NMR), a unique view on the microstructure of UC2, before and after heat treatment, and of U2C3 phase has been achieved.|
|JRC Directorate:||Nuclear Safety and Security|
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