b'Figure 1. PCT isotherm for hydrogen absorption of U 3 Si 2 . Hydrogen absorption behavior shows that the hydride phase miscibility gap is at a temperature between 350 and 400 C. Dashed lines are shown at atmospheric pressure and at a H/U ratio of 2/3 (U 3 Si 2 H 2 ).Accomplishments measurements at different The goals of the hydrogentemperatures would proceed much absorption measurements andmore quickly. It was found that subsequent phase analysis were tothe first complete hydriding was determine the final stoichiometry ofaccomplished in approximately one hydrided U 3 Si 2 , the thermodynamicsweek, while subsequent absorption of hydride formation, and toexperiments of desorbed material characterize the hydride phasewere completed in under two days. evolution as a function of H/UEquilibrium hydrogen pressure was ratio. Upon hydriding, it wasplotted as a function of H/U ratio found that U 3 Si 2pulverized toand were used to develop pressure-fine particle size. Samples werecomposition-temperature (PCT) subjected to hydrogen absorptionisotherms for the U 3 Si 2 -H system. and desorption experimentsThe results of this analysis are so that subsequent absorptionshown in Figure 1. The XRD analysis 52 2019|AFC ACCOMPLISHMENTS'