Diffusion-limited reactive wetting: Spreading of Cu-Sn-Ti alloys on vitreous carbon
When wetting is promoted by interfaces, the rate at which the liquid spreads over the solid substrate is controlled by the rate at which the well-wetted interfacial product can be formed along the liquid/solid/atmospheric triple line. If this reaction involves a reactive alloy addition to the liquid, the rate of spreading can be limited by two phenomena. A simplified analysis of diffusion- limited reactive spreading of Cu-Sn-Ti alloys on vitreous carbon was conducted based on the assumption that the interfacial reaction is strictly localized at the triple line. The addition of 3at.%Ti to Cu-15at.%Sn led to very good wetting on vitreous carbon. This was due to the formation, at the interface, of a continuous layer of TiC.
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Keywords: Contact angle ; Diffusion ; Interfaces ; Reactive wetting ; Spreading ; Activation energy ; Additives ; Carbon ; Diffusion in solids ; Granular materials ; Nucleation ; Perturbation techniques ; Phase interfaces ; Reaction kinetics ; Surface chemistry ; Titanium carbide ; Wetting ; Copper chromium alloys ; Reactive spreading ; Sessile drop experiments ; Surface density ; Vitreous carbon ; Copper alloys
L.T.P.C.M., URA-CNRS 29, Inst. National Polytech. de Grenoble, F-38402 St. Martin-d'Heres, Cedex, France CODEN: SCMAF;
Record created on 2006-10-09, modified on 2016-08-08