Crystallisation process in Mg₆₀Cu₃₀Gd_10-xNd_x(x = 0, 8.5) amorphous alloys

Abstract

Mg 60 Cu 30 Gd 10 and Mg 60 Cu 30 Gd 1.5 Nd 8.5 ribbons were obtained by melt spinning. For both compositions, a fully amorphous phase was found and a clear Tg was observed. In-situ XRD measurements were carried out during heating of ribbons at the ID11 synchrotron beamline of ESRF, Grenoble (France). In order to identify the crystallisation products, an annealed Mg 60 Cu 30 Gd 10 master alloy was analysed by SEM/EDS and XRD. The existence of new ternary compounds (MgCu 4 Gd and Mg 2 CuGd) in the Mg-Cu-Gd system is suggested.