Hydrogenation of 1-type AlNi alloy at high pressure and temperature

遠藤 成輝*; 齋藤 寛之; 町田 晃彦; 片山 芳則

Journal of Alloys and Compounds, 645(Suppl.1), p.S61 - S63, 2015/10

https://doi.org/10.1016/j.jallcom.2015.01.200

We investigated the hydrogenation of the 1-type AlNi alloy at 3 GPa and 500C using in situ synchrotron radiation X-ray diffraction measurements. An isotropic lattice expansion was observed to have occurred owing to the hydrogenation, and a novel hydride (AlNiH) was formed. Because of such isotropic lattice expansion, the hydrogen-occupied sites were the body-center sites of the 1 structure (P-3). In this case, the hydrogen content was calculated to be = 1.0, which is consistent with the experimental results. The AlNiH hydride was stable under ambient conditions.