Anisotropy in the thermal expansion of uranium silicide measured by neutron diffraction
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Yn: Journal of Nuclear Materials, Cyfrol 508, 01.09.2018, t. 516-520.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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T1 - Anisotropy in the thermal expansion of uranium silicide measured by neutron diffraction
AU - Obbard, E.G.
AU - Johnson, K.D.
AU - Burr, P.A.
AU - Lopes, D.A.
AU - Gregg, D.J.
AU - Liss, K.-D.
AU - Griffiths, G.
AU - Scales, N.
AU - Middleburgh, S.C.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - 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.
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.
U2 - 10.1016/j.jnucmat.2018.04.049
DO - 10.1016/j.jnucmat.2018.04.049
M3 - Article
VL - 508
SP - 516
EP - 520
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
ER -