Composition design, synthesis and hydrogen storage ability of multi-principal-component alloy TiVZrNbTa

•Thermodynamic model of single-phase high entropy alloys formation was developed.•Single-phase TiVZrNbTa equiatomic alloy was synthesized by various techniques.•Effect of synthesis method on alloy hydrogenation behavior was examined.•Alloy synthesis from melt results in improved stability upon hydro...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2022-04, Vol.901, p.163638, Article 163638
Main Authors: Zadorozhnyy, V., Tomilin, I., Berdonosova, E., Gammer, C., Zadorozhnyy, M., Savvotin, I., Shchetinin, I., Zheleznyi, M., Novikov, A., Bazlov, A., Serov, M., Milovzorov, G., Korol, A., Kato, H., Eckert, J., Kaloshkin, S., Klyamkin, S.
Format: Article
Language:English
Subjects:
Alloy powders
Alloys
Amorphization
Arc-melting
Body centered cubic lattice
Electric arc melting
Electron beam melting
Face centered cubic lattice
Hydrogen storage
Hydrogenation
Mechanical alloying
Mechanical tests
Multi-principal-component alloys
Pendant drop melt extraction
Single phase
Synthesis
Thermal analysis
Thermodynamic model
Thermodynamic models
X ray powder diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Thermodynamic model of single-phase high entropy alloys formation was developed.•Single-phase TiVZrNbTa equiatomic alloy was synthesized by various techniques.•Effect of synthesis method on alloy hydrogenation behavior was examined.•Alloy synthesis from melt results in improved stability upon hydrogenation. A thermodynamic model was proposed to assess the feasibility of the synthesis of single-phase multi-principal-component alloy. Based on this model, single-phase TiVZrNbTa equiatomic alloys with body centered cubic (BCC) structure were obtained by arc melting (AM), electron beam melting with pendant drop melt extraction (EBM-PDME) and mechanical alloying (MA). The alloys were characterized by powder X-ray diffraction, scanning and transmission electron microscopy, thermal analysis and mechanical testing. The hydrogenation behavior of the synthesized materials was studied by a volumetric method. It was found that for AM and EBM-PDME alloys a complete BCC-to-FCC structure transformation occurs upon hydrogenation, and hydrogen concentration in the hydrides formed reaches 1.5 H/M (1.6 wt%). MA alloy undergoes partial amorphization with maximum hydrogen absorption capacity of 0.9 wt%.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2022.163638