Title

Effects of substituting Cu for Sn on the microstructure and hydrogen absorption properties of Co-free AB5 alloys

RIS ID

110931

Publication Details

Serafim Casini, J., Silva, F. Martins., Guo, Z., Liu, H. Kun., Faria, R. Nunes. & Takiishi, H. (2016). Effects of substituting Cu for Sn on the microstructure and hydrogen absorption properties of Co-free AB5 alloys. International Journal of Hydrogen Energy, 41 (38), 17022-17028.

Abstract

The effects of substituting Cu for Sn on the microstructure, hydrogen storage capacity of La0.7Mg0.3Al0.3Mn0.4Sn0.5¿xCuxNi3.8 alloys (where X = 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 = 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.

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.ijhydene.2016.07.107