Synthesis and Characterization of Mg Obtained by Mechanical Alloying and Doped with Al2O3 and Y2O3

Abstract

For several years mechanical alloying has been a well-known process in metallurgy; however, today, mechanical alloys of different metal powders are subjected to repeated mechanical deformations in a powder mill [1]. The balance between cold welding and fracturing leads to the formation of metal compounds in the early stages of grinding and the development of a homogeneous alloy after longer processing. It has recently been found that the amorphous alloy may be produced by mechanical alloying from crystalline elemental powders. Mechanical grinding therefore has on other methods the obtaining of powder, nanocrystalline materials in solid state, thus eliminating the limitations associated with melting points and relative solubilities [2]. It allows the synthesis of new alloys with an initial mixture of high and low melting temperature elements [3], and the synthesis of alloys or composites with highly dispersed components, far from their state of thermal equilibrium.