Hydrogen storage properties of
V+TiFe0.85Mn0.15 multi-phase alloys
made by mechanical alloying
V+TiFe0.85Mn0.15 multi-phase alloys
made by mechanical alloying
(Department of Materials Science and Engineering,
Zhejiang University, Hangzhou 310027, China)
Zhejiang University, Hangzhou 310027, China)
Abstract: The mechanical alloying technique was used to make multi-phase alloys V+TiFe0.85Mn0.15. Their hydrogen storage properties were characterized and compared with that of the polycrystalline alloys made by casting. It was found that the ball milled alloys can absorb hydrogen at room temperature in the first cycle with out prior activation. The 40%V+60%TiFe0.85Mn0.15 alloy made by mechanical alloying shows the best hydrogen storage property with the valid hydrogen capacity up to 220mL/g at 293K and 4.0MPa, and the P-C-T behavior is also improved. The XRD and EDX analyses also show that the phase of these alloys contains V, TiFe, γ-TiMnx, TiFe2 and α-FeV. The composition of these phases affects significantly the hydrogen storage properties of alloys.
Key words: V-based alloys; TiFeMn; hydrogen storage property; mechanical alloying (MA)