Hydrogen-induced phase transition of MgZrTiFe0. 5Co0. 5Ni0. 5 high entropy alloy
International Journal of Hydrogen Energy, 2018•Elsevier
In this study, the MgZrTiFe 0.5 Co 0.5 Ni 0.5 high entropy alloy was processed by high-
energy ball milling under both argon and hydrogen atmospheres. The hydrogen storage
behavior of the samples was evaluated by combination of thermal analyses and in-situ
synchrotron powder X-ray diffraction. It is shown that this alloy forms a body-centered cubic
(BCC) structure when milled under argon pressure. The BCC phase is capable to absorb up
to 1.2% wt. of hydrogen and during absorption it undergoes a phase transition forming a …
energy ball milling under both argon and hydrogen atmospheres. The hydrogen storage
behavior of the samples was evaluated by combination of thermal analyses and in-situ
synchrotron powder X-ray diffraction. It is shown that this alloy forms a body-centered cubic
(BCC) structure when milled under argon pressure. The BCC phase is capable to absorb up
to 1.2% wt. of hydrogen and during absorption it undergoes a phase transition forming a …
Abstract
In this study, the MgZrTiFe0.5Co0.5Ni0.5 high entropy alloy was processed by high-energy ball milling under both argon and hydrogen atmospheres. The hydrogen storage behavior of the samples was evaluated by combination of thermal analyses and in-situ synchrotron powder X-ray diffraction. It is shown that this alloy forms a body-centered cubic (BCC) structure when milled under argon pressure. The BCC phase is capable to absorb up to 1.2%wt. of hydrogen and during absorption it undergoes a phase transition forming a face-centered cubic (FCC) high entropy hydride. This FCC hydride can be directly synthesized by high-energy ball milling under hydrogen pressure.
Elsevier
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