Abstract
Hydrogen absorption–desorption properties of Ti–M–V–B (M=Cr, Mn) metastable BCC alloys have been examined at hydrogen pressures of 0.01–7 MPa and a temperature of 303 K using an automatic Sieverts apparatus. Ti 37Mn 25V 38B x alloys were prepared by arc melting and Ti 31Cr 30V 39B x ( x=0, 6) alloys were prepared by a suction casting method. The crystal structure and lattice parameters of the alloys were examined by an X-ray diffraction analysis (XRD) in addition to pressure–composition isotherms. The Ti 37Mn 25V 38 alloy and the Ti 31Cr 30V 39B x ( x=0, 6) alloys were BCC single phase and had large hydrogen storage capacities.
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