Nanometer-sized MgB2 was prepared via a two-step modification of the mechanically
activated self-propagated high-temperature synthesis. The experimental conditions and
some structural and phase characteristics of the synthesized product are reported. It is
shown that a single-phase material can be prepared after 2h of intense mechanical
treatment of the starting magnesium and boron powders and a synthesis induced at a
current-pulse density of 30Acm− 2. The average size of MgB2 particles synthesized in this …