Resumo

MARTINEZ-FRANCO, E.; KLASSEN, T.; JARAMILLO-VIGUERAS, D.  e  BORMANN, R.. Hydrogen Sorption Properties of the Intermetallic Mg₂Ni Obtained by Using a Simoloyer Ball Milling. Ing. invest. y tecnol. [online]. 2010, vol.11, n.3, pp.325-332. ISSN 2594-0732.

Intermetallic Mg₂Ni was produced from elemental powder blends by mechanical alloying in a batch scale using a rotary horizontal mill (Simoloyer). Fast hydrogenation kinetics are obtained: 2.2 wt.% of hydrogen is absorbed within 10 minutes at 300 °C. Hydrogen sorption kinetics were further improved by adding Pd (1 mol%) powder as a catalyst during ball milling. Crack formation and concomitant particle size reduction was observed by scanning electron microscopy after hydrogen cycling, which is attributed to internal stresses in the particles.

Palavras-chave : High-energy ball milling (Simoloyer); hydrogen storage; particle size evolution.

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