Partial structure factors of liquid al80 (mnx(fecr) 1-x)20 alloys

M. Maret , A. Pasturel , C. Senillou , J.M. Dubois , P. Chieux

The structure of the liquid Al80(Mnx(FeCr)1-x )20 alloys has been studied using neutron diffraction and the substitution between Mn atoms and the σ-FeCr mixture. We have checked that this substitution is isomorphous by performing four measurements on different mixtures with x = 1, 0.639, 0.304 and 0. The Bhatia-Thornton as well as the Faber-Ziman partial structure factors have been determined and in particular, certain features in the SNN function and in the distribution of transition metal atom pairs point out to the existence of a well-defined topological ordering. But a simple comparison between the interatomic distances and partial coordination numbers in the liquid, quasicrystalline and crystalline phases is still insufficient to characterize clearly the type of local order. The chemical ordering effects in these liquid alloys are relatively moderate with a chemical short-range order parameter of - 0.05.

Mots clés: aluminium alloys; chromium alloys; iron alloys; liquid alloys; liquid structure; manganese alloys; neutron diffraction examination of liquids; short range order

Domaines: Articles anciens

M. Maret, A. Pasturel, C. Senillou, J.M. Dubois, P. Chieux. Partial structure factors of liquid al80 (mnx(fecr) 1-x)20 alloys. Journal de Physique, 1989, 50 (3), pp.295-310. ⟨10.1051/jphys:01989005003029500⟩. ⟨jpa-00210919⟩