Porth Ymchwil

Anisotropy in the thermal expansion of uranium silicide measured by neutron diffraction

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Dangosydd eitem ddigidol (DOI)

  • E.G. Obbard
    University of New South Wales, AustraliaAustralian Nuclear Science and Technology Organisation
  • K.D. Johnson
    AlbaNova Universitets Centrum, Stockholm
  • P.A. Burr
    University of New South Wales, AustraliaAustralian Nuclear Science and Technology Organisation
  • D.A. Lopes
    AlbaNova Universitets Centrum, Stockholm
  • D.J. Gregg
    Australian Nuclear Science and Technology Organisation
  • K.-D. Liss
    Australian Nuclear Science and Technology Organisation
  • G. Griffiths
    Australian Nuclear Science and Technology Organisation
  • N. Scales
    Australian Nuclear Science and Technology Organisation
  • S.C. Middleburgh
    Westinghouse Electric Sweden AB
In-situ neutron diffraction patterns were collected for a sample of as-cast U3Si2 during heating to 1600 °C. Anomalous changes were observed above 1000 °C, including the formation of a new diffraction peak not belonging to P4/mbm U3Si2, unequal changes in the peak intensities and onset of anisotropic lattice expansion. The large data-set enabled derivation of a function-fitted isotropic thermal expansion coefficient to high precision, in close agreement with previous dilatometry results but reducing linearly with temperature over the studied interval. Anisotropy in the instantaneous lattice thermal expansion corresponded to anomalies reported by White et al. (2015) at a similar temperature.
Iaith wreiddiolSaesneg
Tudalennau (o-i)516-520
CyfnodolynJournal of Nuclear Materials
Cyfrol508
Dyddiad ar-lein cynnar30 Mai 2018
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 1 Medi 2018
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