Interaction in (Ti,Sc)Fe2-H2 and (Zr,Sc)Fe2-H2 systems

Results of investigation of hydrogen sorption properties of Ti(Zr)(x)Sc(1-x)Fe(2)(x= 1, 0.8 and 0.5) alloys are presented. The measurements were performed for pressures up to 3000 atm. In case of titanium alloys hydride formation was established only for x = 0.5. Estimated equilibrium absorption pressure for x = 0.8 and 1.0 was too high for experimental limits of the device. In case of zirconium alloys hydride formation was found for all three concentrations. Absorption-desorption isotherms were measured for the first time for ZrFe(2)-H(2) system. Calculated enthalpy of hydrogen desorption was found to be 21.3 kJ/mole H(2). (C) 2007 Elsevier B.V. All rights reserved.