Effects and Mechanism of Ti Substitution on the Ability of Anti-Disproportionation of Zirconium Cobalt–Hydrogen System

ZrCo alloys with Ti substitution were prepared via the arc-melting method, and then the products before and after hydrogenation were characterized by X-ray diffraction. Results showed that the crystal structure of ZrCo alloys substituted with Ti substitution formed cubic phase, and the lattice parameters of ZrCo alloys and these hydrides decreased with Ti substituted. And the kinetics of the hydrogen-induced disproportionation in the desorption mode for all these alloys was also investigated. Results demonstrated that the rate and extent of the disproportionation of ZrCo alloys decreased with the content of Ti substitution. It could be inferred that the effect of element substitution on the disproportionation of ZrCo alloys was caused by the radius change of hole sizes of hydrogen occupation sites.