Imperial College London
Portrait Picture

ProfessorRobinGrimes

Faculty of Engineering, Department of Materials

BCH Steele Chair in Energy Materials
 
 
 
//

Contact

 

+44 (0)20 7594 6730r.grimes

 
 
//

Location

 

B303cBessemer BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Galvin:2017:10.1016/j.jnucmat.2017.10.036,
author = {Galvin, C and Cooper, MWD and Rushton, MJD and Grimes, RW},
doi = {10.1016/j.jnucmat.2017.10.036},
journal = {Journal of Nuclear Materials},
pages = {300--306},
title = {Oxygen Diffusion in Gd-doped Mixed Oxides},
url = {http://dx.doi.org/10.1016/j.jnucmat.2017.10.036},
volume = {498},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Molecular dynamics simulations have been performed to investigate oxygen transport in (UxPux−1)0.95Gd0.05O1.975, (UxThx−1)0.95Gd0.05O1.975 and (PuxThx−1)0.95Gd0.05O1.975 between 1000 and 3200 K. Oxygen diffusivity and corresponding activation energies are examined and compared to values for the undoped (UxPux−1)O2, (UxThx−1)O2 and (PuxThx−1)O2 systems where compositions between end members display enhanced diffusivity. Below the superionic transition oxygen diffusivity for the Gd doped systems is orders of magnitude greater compared to their undoped counterparts. However, enhanced diffusivity for doped mixed actinide cation compositions is not observed compared to doped end members. Changes in activation energy suggest changes in diffusion regime, which correspond to the creation of thermally activated oxygen defects.
AU  - Galvin,C
AU  - Cooper,MWD
AU  - Rushton,MJD
AU  - Grimes,RW
DO  - 10.1016/j.jnucmat.2017.10.036
EP  - 306
PY  - 2017///
SN  - 0022-3115
SP  - 300
TI  - Oxygen Diffusion in Gd-doped Mixed Oxides
T2  - Journal of Nuclear Materials
UR  - http://dx.doi.org/10.1016/j.jnucmat.2017.10.036
UR  - http://hdl.handle.net/10044/1/52463
VL  - 498
ER  -
Download