Fadonougbo, Julien O.
Suh, Jin-Yoo
Shim, Cheol-Hwee
Kim, Gyeung-Ho
Fleury, Eric
Cho, Young Whan
2024-01-20T00:30:34Z
2024-01-20T00:30:34Z
2021-09-03
2017-10-15
0925-8388
https://pubs.kist.re.kr/handle/201004/122168
Different Cu-Zr alloys were hydrogenated under 100 bars of hydrogen pressure at different temperatures. The hydrogenation induced transformation of the initially amorphous phase into a polycrystalline structure characterized by its nanoscale (<5 nm), mostly composed of metallic Cu and ZrH2. Calorimetry measurements after hydrogenation showed a low temperature exothermic transformation occurring in the alloys hydrogenated at temperatures below 473 K, followed by multiple endothermic peaks at higher temperature attributed to dehydrogenation of different hydride phases. Activation barrier energies of the phase transformation were derived from Kissinger's method, and further characterization involving transmission electron microscopy revealed the existence of delta ZrH2 with cubic structure contrasting with the typical epsilon ZrH2 with tetragonal structure. This study evidences the effect of hydrogen pressure, temperature, and the alloy chemistry on the nature of the hydride formation in Cu-Zr binary amorphous alloys during the hydrogenation procedure. (C) 2017 Elsevier B.V. All rights reserved.
English
ELSEVIER SCIENCE SA
NI-NB-ZR
HYDROGEN PERMEABILITY
THERMAL-STABILITY
METALLIC GLASSES
CRYSTALLIZATION
PERMEATION
MEMBRANES
BEHAVIOR
Nanometer-scale phase separation and formation of delta ZrH2 in Cu-Zr binary amorphous alloys
Article
10.1016/j.jallcom.2017.06.012
1
JOURNAL OF ALLOYS AND COMPOUNDS, v.721, pp.646 - 652
JOURNAL OF ALLOYS AND COMPOUNDS
721
646
652
scie
scopus
000405252400075
2-s2.0-85020377645
Chemistry, Physical
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Chemistry
Materials Science
Metallurgy & Metallurgical Engineering
Article
NI-NB-ZR
HYDROGEN PERMEABILITY
THERMAL-STABILITY
METALLIC GLASSES
CRYSTALLIZATION
PERMEATION
MEMBRANES
BEHAVIOR
Metallic glass
Zirconium-hydride
Crystal structure
Differential scanning calorimetry
Transmission electron microscopy