Influence of Ta and Nb on the hydrogen absorption kinetics in Zr-based alloys

Hydrogen Induced Abrupt Structural Expansion at High Temperatures of a Ni32Nb28Zr30Cu10 Membrane for H2 Purification

“…Indeed, in many cases Ni-Nb ribbons were hydrogenated by means of electrolytic charging [30,31], instead of the direct reaction with H 2 gas. Conic et al [32] measured only the absorption kinetics at various temperatures of Zr alloys containing Nb and Ta mixtures (10 wt % Nb, 12 wt % Ta and 10 wt % Nb and 12 wt % Ta). Hao et al reported pressure-composition curves measured at 300 °C for Ni 60 Nb 40 , (Ni 0.6 Nb 0.4 ) 50 Zr 50 and (Ni 0.6 Nb 0.4 ) 70 Zr 30 [33].…”

Experiment and simulation on Zr2Fe bed for tritium capturing

“…The Zr 2 Fe powder of 1.5 g was used to measure the hydrogen absorption properties in SETARAM PCT-Pro setup under 300 C and 1 bar conditions. A formula suitable for alloy powder x H 2 ¼ 1 À (1 À 1/ 2O(t/t 0.875 )) 3 was used to t our isothermal hydrogen absorption curve. [9][10][11][12] The tting result was generally acceptable with a deviation R 2 ¼ 0.989 as shown in Fig.…”

“…Zr based alloys are widely used in hydrogen storage and puri-cation systems. [1][2][3][4][5] A glove box with a tritium extraction system is an important safety containment system for tritium processing system in fusion reactor tritium factories. The ow bed lled with Zr 2 Fe alloy powders has a satisfying ability for hydrogen capture from an inert gas carrier situation, and its absorption efficiency is sufficiently high to fulll the tritium recovery material requirements.…”

Changes in microstructures and hydrogen permeability of Nb30Hf35Co35 eutectic alloy membranes by annealing

“…The volume fraction of BCC-(Nb, Hf) phase for the as-cast and a-samples at 1073 K, 1173 K, and 1273 K is~35.1 vol.%,~36.2 vol.%,~36.8 vol.% and~37.5 vol.%, respectively. The value of K in a BCC-Nb solid-solution phase is usually much higher than that in corresponding intermetallic phase for Nb-based multi-phase alloys [16,17]. Increase in annealing temperature lead to increase in the volume fraction of solid-solution BCC-(Nb, Hf) phase and decrease in the volume fraction of intermetallic HfCo phase, thus raising its hydrogen solubility coefficient.…”