Zavaliy I. New hydrides of intermetallic compounds and alloys on the basis of zirconium and titanium

The dissertation is focused on studies of processes of hydrogen absorption/desorption (in gaseous phase and 6M KOH alkaline solution) of new and known intermetallic compounds and alloys on the basis of zirconium and titanium, namely, oxygen-modified h-phases with the Ti2Ni (h-Fe3W3C) type of structure, oxygen-stabilised Zr3Fe(Co,Ni)Ox compounds with the structure of the Re3B type, the k-Zr9V4S phase with the Hf9Mo4B type structure, ternary Zr6MX2 (M=Fe,Co,Ni; X=Al,Ga,Sn,In) IMC with the Fe2P type structure. For the first time it was shown the dependence of hydrogenation capacity of Zr3V3Ox alloys from the quantity of the oxygen. It has been established the decrease of ability to disproportionation with the increase of oxygen content for the Zr4Fe2Ox and (Zr0,8Hf0,2)2Fe compounds. For the first time it has been determined the positive influence of HDDR treatment on electrode characteristics of Ti2NiOx -based alloys. The crystal structure of the novel hydrides has been determined and the distribution ofhydrogen atoms was analyzed. Partially the physical and physical-chemical properties of the synthesized hydrides have been studied. The compositions of novel getter and metal-hydride electrode materials as well as hydrogen storage alloys have been proposed on the basis of the established composition-structure-properties relationships.