Thermal expansion of ThO2-2, 4 and 6 wt.% UO2 by HT-XRD

The lattice thermal expansion (quasi-isotropic) behaviour of polycrystalline sample of ThO2-2, 4 and 6wt.% UO2 has been investigated from room temperature to 1623K in vacuum using high-temperature X-ray diffraction (XRD). The incorporation of UO2 systematically influences the thermal expansion behav...

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Bibliographic Details
Published in:Thermochimica acta 2004-11, Vol.421 (1-2), p.69-71
Main Authors: TYAGI, A. K, MATHEWS, M. D, AMBEKAR, B. R, RAMACHANDRAN, R
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Physics
Thermal expansion
thermomechanical effects
Thermal expansion
thermomechanical effects and density
Thermal properties of condensed matter
Thermal properties of crystalline solids
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Summary:The lattice thermal expansion (quasi-isotropic) behaviour of polycrystalline sample of ThO2-2, 4 and 6wt.% UO2 has been investigated from room temperature to 1623K in vacuum using high-temperature X-ray diffraction (XRD). The incorporation of UO2 systematically influences the thermal expansion behaviour of ThO2. The coefficients of quasi-isotropic average lattice thermal expansion of ThO2, ThO2-2, 4 and 6wt.% UO2, over a temperature range of 293 and 1623K, are found to be as 9.67x10(-6), 9.82x10(-6), 10.09x10(-6) and 10.37x10(-6)K(-1), respectively. This study will be useful in designing the nuclear reactor fuel assembly based on ThO2.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2004.02.025