Investigation of the hydrogen interaction with Ti0.9Zr0.1Mn1.3V0.7 by means of the calorimetric method

• The Ti0.9Zr0.1Mn1.3V0.7-H2 system was studied in the 52–130 °C.
• Formation of 1-2 hydride phases depending on reaction temperature was found.
• ΔHabs.(des.) at 52–72 °C and H concentration 1 < C < 3 increase with H concentration.

In the present work we studied the hydrogen interaction with the stoichiometric Ti0.9Zr0.1Mn1.3V0.7 Laves phase compound C14 at pressure up to 50 atm and the temperature range from 52 to 130 °C by means of calorimetric method and plotting of pressure-composition isotherms. The processes of hydrogen absorption and desorption were carried out. The findings enabled us to draw the following conclusions: 1) the experimental temperature influences the thermodynamic parameters of studied processes and 2) depending on reaction conditions the formation of one or two hydride phases takes place.