Javier-Antonio Gonzalez-Joa

St-Exupery, 2ème

Sujet de thèse: Multi-scale modeling of ultra-hard nanoparticles.
Ph.D Advisors: Dr. Jonathan Amodeo, Pr. Michel Perez.
Micro- and nano-objects as pillars, wires, thin films and particles have recently drawn intensive scientific attention due to their outstanding mechanical properties. They generally show very high yield strengths compared to their massive counterpart, as well as an increased ductility and a lack of failure under extreme compressive stresses. While these size effects have been widely studied in metals, few recent studies show that these original properties could apply to other material families as e.g., ceramics, intermetallics or semi- conductors opening routes toward new super-hard nanocrystalline materials. In the case of nano-ceramics, this would imply a real technological push forward, in terms of processing and mechanical properties during use.Javier Gonzalez uses the Dislocation Dynamics mesoscale approach to model ceramic and metallic nanoparticels under realistic conditions of deformation. In particular, his approach rely on atomistic inputs as well as on experimental observations.
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