Synthesis of Mg-Ti FCC hydrides from Mg-Ti BCC alloys

Hydrogenation of Mg-Ti BCC (body centered cubic) alloys which were prepared by means of ball milling has been carried out. Mg-Ti hydride with a FCC (face centered cubic) structure was successfully synthesized under a hydrogen pressure of 8 MPa at 303 K for 270 h and at 423 K for 122 h. The synthesized Mg-Ti FCC hydride phase had a chemical formula and the lattice parameter of Mg42Ti58H177 (H/M = 1.77 or hydrogen content of 4.7 mass%) and 0.449(7) nm, respectively.