CHARACTERISTICS OF TITANIUM-BASED C-14-TYPE LAVES PHASE ALLOYS AND THEIR HYDRIDE ELECTRODES

The pressure-composition-temperature (PCT) isotherms, lattice paramete rs and electrode properties of titanium-based Laves phase alloys with various compositions were studied in this work. The as-cast pseudobina ry Ti1-xZrxFe0.15Mn1.21-yV0.64Niy alloys (x = 0-0.2, y = 0-0.6) were f ound to have the same crystal structure of the C14-type Laves phase by analysis of X-ray diffraction patterns. The equilibrium characteristi cs of their hydrides obtained by measuring PCT isotherms at 30-degrees -C were attributed to both geometric and electronic factors. The elect rode properties of the hydrides were dependent on both the plateau pre ssure of the PCT curves and the electrocatalytic activity of their all oys.