Rev.Adv.Mater.Sci. (RAMS)
No 1, Vol. 18, 2008, pages 66-70

GLASS-FORMATION AND HARDNESS OF Mg-BASED MULTICOMPONENT ALLOYS

Paola Rizzi, Marta Satta and Marcello Baricco

Abstract

Multicomponent Mg-based alloys were solidified by melt spinning and by copper mould casting, obtaining ribbons and cone shaped samples with maximum diameter of 4 mm. Fully amorphous samples were obtained for Mg60Ni9Cu9Zn5Y6Ag5Gd6 ingot up to the maximum diameter, but crystals embedded in an amorphous matrix have been found for Mg51N11Cu13Zn4Y5Ag7Gd9 when cone samples are produced. Therefore, a reduction of the Mg content in the alloy produces a decrease in the GFA. The stability of the amorphous phase and the glass transition temperature were determined by calorimetric measurements. Vickers hardness tests were performed on as cast amorphous samples.

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