Isopiestic solubility of hydrogen in vanadium alloys at low temperatures

Substitutional V–Pd alloys for the membranes permeable to hydrogen: Hydrogen solubility at 150–400 °C

“…2(b)e(d)). The similar effect of allowing of V with Ti, Nb and Cr on the hydrogen solution behavior was reported by Peterson and Nelson [18].…”

“…In particular the effects of different allowing elements (Cr [18,20], Ti, Nb [18], Ni [6]) on the solution of hydrogen in substitutional V alloys were investigated and the mechanisms responsible for changes in the hydrogen solubility were discussed [17e20].…”

“…In this work the hydrogen solubility was measured in substitutional VePd alloys with the content of Pd 5,7.3,9.7,12.3,18.8 at% as well as in pure V. The pressureecompositionisotherm (PCT) data were obtained in the range of pressure (10e10 6 ) Pa, temperature (150e400) С and concentration of hydrogen, H/M, from 4•10 À4 to 0.6. Only disordered solution of hydrogen (a phase) was the subject of present study, since only minimum operation temperature (150 C) approached the critical temperature, T k , of aeb phase transition for pure V while other operation temperatures substantially exceeded T k .…”

Structure and Phase Diagram of Ti–V–H System at Room Temperature

“…Since Nagel and Perkins(1) reported a detailed crystallographic investigation of ternary hydrides Til-y VyHx (0<y<0.5, 1.6<x<2.0), many works have been performed to reveal the electronic(2) (11), thermodynamical(12) (13) and diffusive (14)- (17) properties of this system. Some of these works were concerned with the Ti-rich dihydride-phase region as investigated by Nagel and Perkins, but the others involved wider ranges of V and H concentrations, where few reliable data of crystal structures and phase diagrams were available.…”

The State of Hydrogen in Nb-based Nb-Mo Alloys Analyzed by the Channelling Method

“…6,24) On the other hand, Peterson and co-workers reported that evidence for trapping of H could not be observed in the studies on the isopiestic (equal hydrogen pressure) solubility of hydrogen and the hydrogen diffusion in Nb-V alloys for a wide range of solute concentration and, therefore, the enhancement of the TSH could not be ascribed to a simple trapping of hydrogen. 28,29) Oates and Flanagan suggested that the enhancement of the TSH on alloying is likely to be fairly general and explained this by considering only the average effect of alloying on macroscopic thermodynamical quantities. 30) Therefore, the mechanism of the enhancement of the TSH is still an open question.…”