Hydrogen storage nanocrystalline TiFe intermetallic compound: Synthesis by mechanical alloying and compacting

摘要

Equiatomic nanocrystalline TiFe intermetallic compound was synthesized from elementary metals by mechanical alloying in a planetary ball mill. Then the powder produced was compacted by cold pressing into bulk samples keeping the nanocrystalline structure. The hydrogen capacity of TiFe bulk samples was found to be of 1.4 wt.%. The absorption isotherm had a long plateau corresponding to pressures of 0.3-0.4 MPa at room temperature. The bulk samples demonstrated high durability after 20 absorption-desorption cycles.