First hydrogenation kinetics of Zr and Mn doped TiFe alloy after air exposure and reactivation by mechanical treatment. (14th April 2020)

• Record Type: Journal Article
• Authors: Manna, Joydev; Tougas, Bernard; Huot, Jacques
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 20(2020)
• Page Start: 11625
• Page End: 11631
• Publication Date: 2020-04-14
• Subjects: Hydrogen storage -- TiFe alloy -- Metal hydride -- Ball milling -- Cold rolling; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.02.043
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this paper, effect of air exposure on first hydrogenation kinetics of TiFe +4 wt% Zr + 2 wt% Mn alloy was studied. After 7 days of air exposure, the first hydrogenation kinetics of the alloy was slow with a long incubation time. An air exposure of 30 days made the alloy totally inert to hydrogen. In an attempt to recover the hydrogen absorption ability of the alloy, it was mechanically treated using cold rolling and ball milling processes. It was found that the air exposed alloy could be successfully hydrogenated after ball milling and after cold rolling with some loss in hydrogen storage capacity. The loss in storage capacity was more important after ball milling than after cold rolling. Highlights: TiFe with 4 wt% Zr and 2 wt% Mn additives was synthesized. Industrial grade materials were used for synthesis. Effect of air exposure on first hydrogenation kinetics were studied. The alloy became inactive towards first hydrogenation after air exposure. Ball milling and cold rolling were effective to re-activate the alloy.