SILVA, R.A.LEAL NETO, R.M.COUTINHO, G.C.S.LEIVA, D.R.ISHIKAWA, T.T.KIMINAMI, C.S.BOTTA, W.J.2018-09-192018-09-19SILVA, R.A.; LEAL NETO, R.M.; COUTINHO, G.C.S.; LEIVA, D.R.; ISHIKAWA, T.T.; KIMINAMI, C.S.; BOTTA, W.J. Absorption and desorption properties of the Mg + X wt.%TiFe composite, X = 2.5 and 40, manufactured by high-energy ball milling. In: LATIN AMERICAN CONFERENCE ON METASTABLE AND NANOSTRUCTURED MATERIALS, 7th, March 19-22, 2017, Brotas, SP. <b>Abstract...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/29160.http://repositorio.ipen.br/handle/123456789/29160This work compares the absorption and desorption properties of the Mg + TiFe composite with additions of 2.5 and 40 wt. % TiFe. The composite was produced by high-energy ball milling during 36 h at 600 rpm under purified argon atmosphere. The TiFe was previously milled in ethanol absolute to refine the particle size. The composites materials were characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM). The kinetics of hydrogen absorption and desorption were evaluated by differential scanning calorimetry (DSC) and by a Sievert´s type apparatus. For both evaluated compositions, the main results revealed that it was possible absorb H2 at room temperature. Even a few TiFe content (2.5 wt. %) was enough to obtain kinetic improvements. The TiFe had an important role in the kinects of H2 absorption of Mg in a broad range of temperatures, including room temperature.openAccessResumo de eventos científicoshttps://orcid.org/0000-0001-5104-7392