Abstract
The study of the ZrMo1.5V0.5–H2 system had been carried out by calorimetric method, plotting P–C isotherms and X-ray diffraction analysis. The P = f(C) and ΔH = f(C) dependences were obtained for absorption and desorption processes (P—equilibrium hydrogen pressure absorption or desorption, ΔH—partial molar enthalpy of absorption or desorption, C = H/IMC) at 318, 338 and 368 K and the hydrogen pressure up to 50 atm. Moreover, the ΔSdes. = f(C) dependences were calculated on the base of measured calorimetric data and P–C isotherms (ΔSdes.—partial molar entropy of desorption) for 318, 338 and 368 K experiment temperatures. Obtained data enable us to make the following conclusion: the ΔH = f(C) and ΔSdes. = f(C) dependences change with the hydrogen concentration in the metallic matrix and at the transition from 318 to 368 K. This may be connected with the structural variation in the metallic matrix.
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