Structural investigation and solid-II, reaction of Mg2Ni rich nanocomposite materials elaborated by mechanical alloying

Using a planetary ball mill and starting from a mixture of Mg and Ni with an atomic ration of 2:1, we have successfully elaborated a nanocomposite material formed by the Mg,Ni phase in high proportion, same residual Ni and an amorphous phase. The synthesis of this composite proceeded at milling intensities 7 and 10, corresponding respectively to 3.5 and 10 W g(-1) shock power, respectively after 18 and 4 h. The best hydrogen absorption capacity reported, 3.75 H mole(-1) (3.53 wt.%), is for the composite synthesized for 24 h at 3.5 W g(-1) shock power. (C) 1999 Elsevier Science S.A. All rights reserved.