CASINI, JULIO C.S.SILVA, FRANKS M.GUO, ZAI-PINGLIU, HUA K.FARIA, RUBENS N.TAKIISHI, HIDETOSHI2017-01-062017-01-062016CASINI, JULIO C.S.; SILVA, FRANKS M.; GUO, ZAI-PING; LIU, HUA K.; FARIA, RUBENS N.; TAKIISHI, HIDETOSHI. Effects of substituting Cu for Sn on the microstructure and hydrogen absorption properties of Co-free AB5 alloys. <b>International Journal of Hydrogen Energy</b>, v. 41, p. 17022-17028, 2016. DOI: <a href="https://dx.doi.org/10.1016/j.ijhydene.2016.07.107">10.1016/j.ijhydene.2016.07.107</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/26971.0360-3199http://repositorio.ipen.br/handle/123456789/26971The effects of substituting Cu for Sn on the microstructure, hydrogen storage capacity of La0.7Mg0.3Al0.3Mn0.4Sn0.5 xCuxNi3.8 alloys (where X ¼ 0.0, 0.1, 0.2, 0.3, and 0.5) alloys were investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and pressure-composition isotherms (PCIs). The alloys were mainly composed of three phases: LaNi5, MgNi2, and LaNiSn. However, the La0.7Mg0.3Al0.3Mn0.4Cu0.5Ni3.8 alloy (X ¼ 0.5) exhibited a (La, Mg)Ni3 phase when studied with SEM. The PCI tests showed that increasing the Cu content increases the maximum hydrogen storage capacity.17022-17028openAccesscoppertinmicrostructurehydrogenabsorptioncobaltalloysnickelrare earthsx-ray diffractionscanning electron microscopyx-ray spectroscopyisothermsArtigo de periódico4110.1016/j.ijhydene.2016.07.107