Hydrogen Kinetics in Membrane Alloys Based on Fe–Ni, Nb–Ni, and V–Ni

• Published in: Russian metallurgy Metally Vol. 2022; no. 8; pp. 887 - 897
• Main Authors: Sidorov, N. I., Estemirova, S. Kh, Kurbanova, E. D., Polukhin, V. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-08-2022; Springer Nature B.V
• Subjects: Binary alloys; Chemistry and Materials Science; Diffusion; Hydrogen; Hydrogen embrittlement; Iron; Materials Science; Mathematical analysis; Membranes; Metallic Materials; Nickel base alloys; Nickel compounds; Niobium; Palladium base alloys; Parameter modification; Permeability; Selectivity; Shape memory alloys; Solid solutions; Titanium base alloys; Titanium compounds; Vanadium base alloys; hydrides; hydrogen power engineering; diffusion; membrane alloys; permeability; molecular dynamics; hydrogenation; sorption; amorphous structure; intermetallics; interatomic bonds; glass transition; clusters
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029522080158

The kinetic characteristics, namely, diffusion
D
and permeability Φ, of hydrogen in membrane alloys based on binary alloys Fe–Ni, Nb–Ni, and V–Ni are analyzed. Various structural modifications of membrane alloys, namely, amorphous, nanocrystalline, and duplex, have been studied, and the efficiency of selectivity processes in each of these modifications is determined. The influence of thermodynamic parameters, specifically, temperature and pressure, on the permeability and diffusion of hydrogen and its flow (
J
H
 ~ 
D
Φ) in the alloys is revealed. The results of calculations and experimental measurements of hydrogenated and titanium-alloyed membrane alloys based on the binary compositions Nb
85
Ni
15
and V
85
Ni
15
as alternatives to the well-known alloys based on Pd
1 –
x
Ag
x
are analyzed. The intense hydride formation in these alternative membrane alloys is found to be undesirable, as in traditional Pd-based alloys. Titanium-alloyed crystalline Nb–Ti–Ni and V–Ti–Ni alloys consist of a combination of the following solid solutions: a primary bcc [Nb(V), Ti] phase and a eutectic phase {bcc [Nb(V), Ti) + B2 TiNi}. As part of the duplex matrix structure, the eutectic phase prevents hydrogen embrittlement of Nb–Ti–Ni and V–Ti–Ni alloys.