Interfacial properties of immiscible Co-Cu alloys

I. Egry (1) , D M Herlach , L. Ratke , M. Kolbe , D. Chatain (2) , S. Curiotto (2) , L. Battezzati (1) , E. Johnson , N. Pryds

1 SIMaP - Science et Ingénierie des Matériaux et Procédés
2 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille

Using electromagnetic levitation under micro-gravity conditions, the interfacial properties of an Cu 75 Co 25 alloy have been investigated in the liquid phase. This alloy exhibits a metastable liquid miscibility gap and can be prepared and levitated in a configuration consisting of a liquid cobalt-rich core surrounded by a liquid copper-rich shell. Exciting drop oscillations and analysing the frequency spectrum, both surface and (liquid–liquid) interfa-cial tension can be derived from the observed oscillation frequencies. This paper briefly reviews the theoretical background and reports on a recent experiment carried out on board the TEXUS 44 sounding rocket.

Mots clés: miscibility gap; interfacial tension; surface tension; levitation; oscillating drop; microgravity

Domaines: Science des matériaux [cond-mat.mtrl-sci]

I. Egry, D M Herlach, L. Ratke, M. Kolbe, D. Chatain, et al.. Interfacial properties of immiscible Co-Cu alloys. Journal of Materials Science, 2010, 45 (8), pp.1979-1985. ⟨10.1007/s10853-009-3890-0⟩. ⟨hal-00475834⟩