Hydrogenation of transition element additives (Ti, V) during ball milling of magnesium hydride

摘要: Abstract It has been revealed that ball-milling of MgH 2 powders with small amounts selected 3d-transition metals M such as Ti, Nb, … or oxides 3d-metals (e.g. Cr O 3 ) leads to marked improvements the hydrogen absorption/desorption kinetics. We have undertaken systematic co-milling processes under argon atmosphere added V and Nb by using a planetary machine. The resulting products were analysed XRD, SEM absorption techniques. Different milling times applied both particle size degree crystalline/amorphous state estimated. During intensive milling, we pointed out formation transition metal hydrides MH x an effect mechanical alloying. main results are discussed regarding nature d-metal additions time procedure.