The mechanical alloying technique was used to make multi phase alloys V+ TiFe 0.85 Mn 0.15 . Their hydrogen storage properties were characterized and compared with that of the polycrystalline alloys made by casting. I...The mechanical alloying technique was used to make multi phase alloys V+ TiFe 0.85 Mn 0.15 . 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 without prior activation. The 40%V + 60% TiFe 0.85 Mn 0.15 alloy made by mechanical alloying shows the best hydrogen storage property with the valid hydrogen capacity up to 220?mL/g at 293?K and 4.0?MPa, and the P睠 T behavior is also improved. The XRD and EDX analyses also show that the phase of these alloys contains V, TiFe, γ TiMnx, TiFe 2 and α FeV. The composition of these phases affects significantly the hydrogen storage properties of展开更多
文摘The mechanical alloying technique was used to make multi phase alloys V+ TiFe 0.85 Mn 0.15 . 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 without prior activation. The 40%V + 60% TiFe 0.85 Mn 0.15 alloy made by mechanical alloying shows the best hydrogen storage property with the valid hydrogen capacity up to 220?mL/g at 293?K and 4.0?MPa, and the P睠 T behavior is also improved. The XRD and EDX analyses also show that the phase of these alloys contains V, TiFe, γ TiMnx, TiFe 2 and α FeV. The composition of these phases affects significantly the hydrogen storage properties of
