F Delogu 2007 Nanotechnology 18 505702 doi:10.1088/0957-4484/18/50/505702
F Delogu
Show affiliationsMolecular dynamics simulations have been used to investigate the thermal response to a gradual temperature rise of Al core/Ni shell unsupported particles with a radius of about 4 nm and different shell thickness. The different melting points permit a clean separation of the Al and Ni solid-to-liquid transition processes, the Al core melting at temperatures at which the Ni shell still has a well defined solid character. The latent volume released by Al at melting gives rise to a considerable tensile strain in the Ni shell. The mechanical response of the latter depends on its thickness. A sudden failure and a consequent fragmentation of the core/shell system is observed at small shell thickness values.
64.70.Nd Structural transitions in nanoscale materials
Issue 50 (19 December 2007)
Received 10 August 2007, in final form 21 October 2007
Published 20 November 2007
F Delogu 2007 Nanotechnology 18 505702
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