Hydrogen desorption properties of MgH2-TiCr1.2Fe0.6 nanocomposite prepared by high-energy mechanical alloying

▶ The addition of 5 at% Ti-Fe-Cr alloy significantly decreases the dehydrogenation temperature of nanostructured magnesium hydride prepared by mechanical alloying. ▶ The dehydrogenation temperature depends on the processing condition, i.e. addition of the Ti-base alloy in the form of elemental powders or prealloyed powder. ▶ The effect of the Ti-base alloy is discussed based on the size reduction of the primarily particles, grain refinement, formation of binary hydrides, and the presence of active sites.