Bibliographic Details
| Title: |
An atomistic modelling of the porosity impact on UO2 matrix macroscopic properties |
| Authors: |
Jelea, A.1,2,3 andrei.jelea@irsn.fr, Colbert, M.1,2, Ribeiro, F.1, Tréglia, G.2, Pellenq, R.J.-M.2,4 |
| Source: |
Journal of Nuclear Materials. Aug2011, Vol. 415 Issue 2, p210-216. 7p. |
| Subjects: |
Porosity, Uranium oxides, Thermomechanical properties of metals, Simulation methods & models, Temperature effect, Mathematical models, Empirical research, Porous materials |
| Abstract: |
Abstract: The porosity impact on the UO2 matrix thermomechanical properties was investigated using atomistic simulation techniques. The porosity modifies the thermal expansion coefficient and this is attributed to pore surface effects. The elastic moduli at 0K and at finite temperature decrease with porosity, this variation being well approximated using affine functions. These results agree with other mesoscale model predictions and experimental data, showing the ability of the semiempirical potential atomistic simulations to give an overall good description of the porous UO2. However, the surface effects are incompletely described. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
