Temperature dependence of the elastic shear modulus of the Laves-phase materials TaV2 and TaV2Hx

Strong hydrogen-related electronic effects on the shear elastic constant ofTaV2H(D)xFoster1, Hightower2, Leisure3 et al. 2002Phys. Rev. B9050View full textAdd to dashboardCite

“…Preliminary results and analysis have been reported briefly in an earlier work. 38 The present paper reports similar measurements made over an extended temperature range of 3-345 K. Additionally, a number of experimental modifications have significantly improved the quality of the modulus data, permitting a more detailed analysis incorporating the electronic band-structure model. The analysis includes a comparison to electronic density of states measurements from other experiments.…”

“…34,38 To explore in more detail the effects of hydrogen on the elastic properties of TaV 2 , a mechanical resonance technique has been used to measure the elastic moduli of TaV 2 H(D) x for a series of H͑D͒ concentrations. Preliminary results and analysis have been reported briefly in an earlier work.…”

Relationship between compressibility and hydrogen absorption in some Haucke compounds

“…However, considering the approximations on which the estimates of the compressibility rely, these correlations need further investigations. In very recent years, an increasing number of measurements by ultrasonic techniques of the elastic properties of hydrogen absorbing Laves phase [7] as well as substituted Haucke compounds became available [8,9] while theoretical calculations remain very scarse [10].…”

Thermodynamic model of hydride formation and dissolution in spherical particles

“…For dehydrogenization of a harder hydride, the softer metallic phase is predicted to grow from the surface due to both the lower barrier and faster diffusion kinetics. In a number of hydride-forming systems, the hydride phase has smaller elastic moduli than the metallic phase; examples include PdH x [22][23][24], TaV 2 H x [25] and LaNi 5 H 7 [26]. For such systems, Fig.…”

“…(24) and (25). Combining this concentration with P(t), plots of P vs. n can be constructed to study the effect of the pressure charge rate on the hysteresis.…”