Early stages of dissolutive spreading

Received 1 February 2010; received in revised form 24 February 2010; accepted 27 February 2010. published online 08 March 2010.

Abstract

The initial instants of spreading in high-temperature dissolutive systems (Cu and Au on Ni) are recorded using high-speed video and a drop transfer set-up. The results suggest the existence of an initial regime where the advance of the triple junction is too fast compared with dissolution and spreading occurs on a flat unreacted surface. The analysis indicates that spreading is then controlled by the triple-line friction. The calculated friction coefficients are similar to those for non-reactive high-temperature systems.

Keywords: Liquids, Metals, Wetting, Capillary phenomena, Molecular dynamics

a UK Center for Structural Ceramics, Department of Materials & Department of Mechanical Engineering, Imperial College of London, London, UK

b Centre for Research in Molecular Modelling, University of Mons-Hainaut, Parc Initialis, Av. Copernic 1, 7000 Mons, Belgium

c Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Corresponding author.

PII: S1359-6462(10)00133-8

doi:10.1016/j.scriptamat.2010.02.046

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