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STRAIN-INDUCED INTERACTION ENERGIES BETWEEN HYDROGEN-ATOMS IN PALLADIUM

OATES, WA; STONEHAM, AM; (1983) STRAIN-INDUCED INTERACTION ENERGIES BETWEEN HYDROGEN-ATOMS IN PALLADIUM. J PHYS F MET PHYS , 13 (11) 2427 - 2436. 10.1088/0305-4608/13/11/023. Green open access

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Abstract

The authors have made quantitative calculations of the elastic interactions between interstitial hydrogen atoms in Pd metal. These calculations use the Harwell HADES code, and hence go beyond the usual harmonic models. Results have been obtained for several potentials and, where appropriate, agree well with those of previous workers. They find (i) that the absolute values are sensitive to assumptions for the potentials, suggesting caution in the prediction of thermodynamic properties, and (ii) that there are significant few-body terms not included in the usual approaches. These extra terms affect the equilibrium structure, for example by removing the symmetry between fractional occupancies theta and (1- theta ), and may lead to the initial nucleation of metastable structures during hydrogenation. The present results suggest that corner-sharing tetrahedra are favoured.

Type: Article
Title: STRAIN-INDUCED INTERACTION ENERGIES BETWEEN HYDROGEN-ATOMS IN PALLADIUM
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/0305-4608/13/11/023
Publisher version: http://dx.doi.org/10.1088/0305-4608/13/11/023
Language: English
Additional information: Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/59675
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