Keywords: Emulsions; Liquid Monotectic Alloy; Stabilization; Intermetallid; Precipitates
Liquid metallic emulsions are made of two, immiscible liquid metals. Upon severe mixing one of the liquid metals or both form small droplets dispersed in the matrix of another liquid metal. If the system contains small solid particles of appropriate interfacial properties, the particles will be concentrated at the interface between the two liquid metals, wich will lead to stabilization of the liquid metallic emulsion. Stabilization means that despite the gravity induced separation of the system, the microstructure remains heterogeneous [1-4]. In this paper we show that this new class of engineering materials can also be produced if the solid particles are substituted with in-situ forming precipitated phases, in some cases forming coherent layers along the liquid metallic droplets.
References:
[1] I.Budai, G.Kaptay: A new class of engineering materials: particles stabilized metallic emulsions and monotectic alloys, Metall Mater Trans A, 2009, vol.40A, pp.1524-8
[2] I.Budai, G.Kaptay: Monotectic Al/Cd alloys with homogeneously dispersed Cd-droplets stabilized by strontium aluminide precipitates. Intermetallics, 2011, vol.19, pp.423-425
[3] I.Budai, O.Z.Nagy, G.Kaptay: Inversion of a liquid Bi/Al metallic emulsion stabilized by solid SiC particles, Coll Surf A, 2011, vol.377, pp.325-329
[4] G.Kaptay: On the equation of the maximum capillary pressure induced by solid particles to stabilize emulsions and foams and on the emulsion stability diagrams, Coll Surf A, 2006, vol.282-283, pp.387-401