Wetting of Decagonal Al13Co4 and Cubic AlCo Thin Films by Liquid Pb

Claire Bergman (1) , Christophe Girardeaux (1) , Carine Perrin-Pellegrino (1) , Patrick Gas (1) , Dominique Chatain (2) , Jean-Marie Dubois (3) , Nicolas Rivier (4)

1 L2MP - Laboratoire matériaux et microélectronique de Provence
2 CRMCN - Centre de recherche de la matière condensée et des nanosciences
3 LSG2M - Laboratoire de Science et Génie des Matériaux et de Métallurgie
4 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg

Wetting of ìm-sized Pb droplets on thin polycrystalline films of decagonal Al13Co4 and cubic crystalline AlCo phases is reported. The sample preparation is crucial to have Pb droplets lying on a clean surface. Decagonal and cubic films were prepared under high vacuum conditions, by sequential deposition and annealing of specific stackings of Al and Co layers of nanometric thicknesses. A 300nm-thick Pb slab was then deposited on the top of the films. Dewetting experiments were performed in situ in a scanning Auger microprobe where the surface chemistry can be monitored: the Pb slab dewetts into droplets. The wetting of Pb on both substrates was found to be similar with contact angles around 45°.

Mots clés: Physical Sciences

Domaines: Physique [physics]

Claire Bergman, Christophe Girardeaux, Carine Perrin-Pellegrino, Patrick Gas, Dominique Chatain, et al.. Wetting of Decagonal Al13Co4 and Cubic AlCo Thin Films by Liquid Pb. Philosophical Magazine, 2006, 86 (6-8), pp.849-854. ⟨10.1080/14786430500318894⟩. ⟨hal-00513612⟩