Heat of absorption of hydrogen in the α and β phases of zirconium
- 1 September 1986
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 16 (9) , 1173-1179
- https://doi.org/10.1088/0305-4608/16/9/008
Abstract
The differential heat of absorption of hydrogen in zirconium has been measured by means of isoperibol calorimetry in the range of hydrogen concentration 0-0.5 H/Zr at temperatures 873-1123K. In the alpha phase the differential heat decreases with increasing hydrogen concentration except for an increase at very small concentrations but, in contrast, increases in the alpha + beta and beta phases, varying between 0.35 and 0.90 eV. Changes in the differential heat due to changes in elastic constants, lattice parameters and Fermi energy accompanying the absorption of hydrogen have been calculated and compared with the experimental result. The change in Fermi energy is a major contribution to the change in the differential heat.Keywords
This publication has 16 references indexed in Scilit:
- Surface effects on the kinetics of hydrogen absorption by metalsPhysical Review B, 1982
- The thermodynamics of the LaNi5-H2 system by differential heat flow calorimetry I: Techniques; the α + β two-phase regionJournal of the Less Common Metals, 1981
- Self-consistent screening of hydrogen in zirconiumJournal of Physics F: Metal Physics, 1981
- Band Structures of Zirconium HydridesPhysica Status Solidi (b), 1980
- Equation for the multi-plateau isotherm of hydrogen + transition metal systemsJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1979
- Theory of indirect interaction between chemisorbed atomsCritical Reviews in Solid State and Materials Sciences, 1978
- High-temperature thermodynamics of the Ti–H2 and Ti–D2 systemsThe Journal of Chemical Physics, 1976
- Interactions between adatoms on metals and their effects on the heat of adsorption at low surface coverageSurface Science, 1969
- The indirect interaction between atoms or molecules adsorbed on metalsProceedings of the Physical Society, 1967
- Adiabatic elastic moduli of single crystal alpha zirconiumJournal of Nuclear Materials, 1961