Synthesis of FeTi hydrogen storage material via ball milling: effect of milling energy and atmosphere.

Livramento, Vanessa; Rangel, C. M.; Correia, J.B.; Shohoji, Nobumitsu; Silva, R. A.

http://hdl.handle.net/10400.9/760

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Abstract(s)

Attempts were made earlier to synthesize and activate the FeTi intermetallic during ball milling (BM), for H2 storage using sodium boron tetra-hydride (NaBH4) additive as a process controlling agent. Simple reactive milling starting from Fe and Ti powders resulted in heavy agglomeration of powders, due to the self sustaining nature of the reaction following an incubation period. When NaBH4 was used as the process control agent to avoid agglomeration, this resulted in the production of titanium hydride besides FeTi, and as a consequence unfavorable irreversibility in the subsequent hydrogen charging/discharging cycles [1,2,12]. The present work reports on modifications introduced in the synthesis process by changing two processing parameters, namely the milling energy and atmosphere composition

Keywords

Ball milling Atmosphere environment Intermetallic FeTi Nanostructure Hydrogen storage

URI

http://hdl.handle.net/10400.9/760

Citation

Livramento, V.; Rangel, C. M.; Correia, J. Brito; Shohoji, N.; Silva, R. A. Synthesis of FeTi hydrogen storage material via ball milling: effect of milling energy and atmosphere. In: Proceedings International Workshop,Advances in Fuel Cells and the Hydrogen Economy, Polo Tecnológico do Lumiar, 15 Fev. 2008, Lisboa, Portugal, p. 45-46