Calorimetric study of the ZrMo.sub.1.5V.sub.0.5-H.sub.2 system

The study of the ZrMo.sub.1.5V.sub.0.5-H.sub.2 system had been carried out by calorimetric method, plotting P-C isotherms and X-ray diffraction analysis. The P = f(C) and [DELTA]H = f(C) dependences were obtained for absorption and desorption processes (P-equilibrium hydrogen pressure absorption or...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2020-12, Vol.142 (5), p.2043
Main Authors: Anikina, E. Yu, Verbetsky, V. N
Format: Article
Language:English
Subjects:
Calorimetry
Diffraction
Hydrogen
X-rays
Online Access:Get full text
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Summary:The study of the ZrMo.sub.1.5V.sub.0.5-H.sub.2 system had been carried out by calorimetric method, plotting P-C isotherms and X-ray diffraction analysis. The P = f(C) and [DELTA]H = f(C) dependences were obtained for absorption and desorption processes (P-equilibrium hydrogen pressure absorption or desorption, [DELTA]H-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 [DELTA]S.sub.des. = f(C) dependences were calculated on the base of measured calorimetric data and P-C isotherms ([DELTA]S.sub.des.-partial molar entropy of desorption) for 318, 338 and 368 K experiment temperatures. Obtained data enable us to make the following conclusion: the [DELTA]H = f(C) and [DELTA]S.sub.des. = 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.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-020-10327-4