Abstract
In this paper, we report the microstructure and hydrogen storage properties of TiFe + 4 wt% (Zr + 2Mn) alloy before and after high-energy milling. The as-cast sample was made of a main TiFe phase with a Zr- and Mn-rich secondary phase. We found that ball milling can significantly reduce the crystallite size of TiFe + 4 wt% (Zr + 2Mn) alloy. First hydrogenation measurements showed that the sample milled for 15 min displayed a faster hydrogenation than the as-cast sample but with a slight loss of capacity. Further milling made the samples totally inert to hydrogen. It may be concluded that the as-cast alloy has a special microstructure that is possibly destroyed by milling.
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Acknowledgements
We are thankful to Fonds de recherche du Quebec-Nature et technologies (FRQNT) for a Ph.D. fellowship (P. L.) and MITACS for an internship fellowship (G. R.). We would also thank Mrs. A. Lejeune for SEM analysis.
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Romero, G., Lv, P. & Huot, J. Effect of ball milling on the first hydrogenation of TiFe alloy doped with 4 wt% (Zr + 2Mn) additive. J Mater Sci 53, 13751–13757 (2018). https://doi.org/10.1007/s10853-018-2301-9
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DOI: https://doi.org/10.1007/s10853-018-2301-9