Structure of UC2 and U2C3:XRD, 13C NMR and EXAFS study

U. Carvajal Nuñez; R. Eloirdi; D. Prieur; L. Martel; E. López Honorato; I. Farnan; T. Vitova; J. Somers

doi:10.1016/j.jallcom.2013.11.202

Structure of UC₂ and U₂C₃:XRD, ¹³C NMR and EXAFS study

U. Carvajal Nuñez, R. Eloirdi, D. Prieur, L. Martel, E. López Honorato, I. Farnan, T. Vitova, J. Somers

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

In this study, uranium dicarbide (UC₂) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U ₂C₃) 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.

Original language	English
Pages (from-to)	234-239
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	589
DOIs	https://doi.org/10.1016/j.jallcom.2013.11.202
State	Published - Mar 15 2014
Externally published	Yes

Keywords

Carbides
EXAFS
NMR
Nuclear Fuel
Uranium
XRD

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10.1016/j.jallcom.2013.11.202

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title = "Structure of UC2 and U2C3:XRD, 13C NMR and EXAFS study",

abstract = "In this study, uranium dicarbide (UC2) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U 2C3) 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.",

keywords = "Carbides, EXAFS, NMR, Nuclear Fuel, Uranium, XRD",

author = "{Carvajal Nu{\~n}ez}, U. and R. Eloirdi and D. Prieur and L. Martel and {L{\'o}pez Honorato}, E. and I. Farnan and T. Vitova and J. Somers",

year = "2014",

month = mar,

day = "15",

doi = "10.1016/j.jallcom.2013.11.202",

language = "English",

volume = "589",

pages = "234--239",

journal = "Journal of Alloys and Compounds",

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T1 - Structure of UC2 and U2C3:XRD, 13C NMR and EXAFS study

AU - Carvajal Nuñez, U.

AU - Eloirdi, R.

AU - Prieur, D.

AU - Martel, L.

AU - López Honorato, E.

AU - Farnan, I.

AU - Vitova, T.

AU - Somers, J.

PY - 2014/3/15

Y1 - 2014/3/15

N2 - In this study, uranium dicarbide (UC2) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U 2C3) 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.

AB - In this study, uranium dicarbide (UC2) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U 2C3) 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.

KW - Carbides

KW - EXAFS

KW - NMR

KW - Nuclear Fuel

KW - Uranium

KW - XRD

UR - http://www.scopus.com/inward/record.url?scp=84890915797&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2013.11.202

DO - 10.1016/j.jallcom.2013.11.202

M3 - Article

AN - SCOPUS:84890915797

SN - 0925-8388

VL - 589

SP - 234

EP - 239

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Structure of UC₂ and U₂C₃:XRD, ¹³C NMR and EXAFS study

Abstract

Keywords

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