Hydrogen absorption of TiFe alloy synthesized by ball milling and post-annealing

The correlation of the hydrogen absorption properties to the phase structure of the TiFe alloys prepared by mechanical allying was investigated. In the mechanical alloying process, the crystalline or amorphous phases of TiFe alloy were formed. It found that TiFe amorphous phase recrystallized around 750 K. From the above results, the mixture of Ti and Fe prepared by short period ball milling was post annealed over 773 K. As the results, TiFe alloy was successfully synthesized. These TiFe alloys are able to absorb the hydrogen without activated treatment and it was found that the plateau pressure was controlled by post-annealing temperature.