Hydrogen storage performance and phase transformations in as-cast and extruded Mg-Ni-Gd-Y-Zn-Cu alloys

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dc.contributor.authorYao, Hen_AU
dc.contributor.authorZeng, Gen_AU
dc.contributor.authorTan, XFen_AU
dc.contributor.authorGu, QFen_AU
dc.contributor.authorNogita, Ken_AU
dc.contributor.authorGuo, Jen_AU
dc.contributor.authorLi, Qen_AU
dc.date.accessioned2023-03-29T22:25:11Zen_AU
dc.date.available2023-03-29T22:25:11Zen_AU
dc.date.issued2023-04-18en_AU
dc.date.statistics2023-03-22en_AU
dc.description.abstractThermal-mechanical processing of magnesium-based materials is an effective method to tailor the hydrogen storage performance. In this study, Mg-Ni-Gd-Y-Zn-Cu alloys were prepared by Direct Chill (DC) casting, with and without extrusion process. The influences of microstructure evolution, introduced by DC casting and thermal-mechanical processing, on the hydrogen storage performance of Mg-Ni-Gd-Y-Zn-Cu alloys were comprehensively explored, using analytical electron microscopy and in-situ synchrotron powder X-ray diffraction. The result shows that the extruded alloy yields higher hydrogen absorption capacity and faster hydrogen ab/desorption kinetics. As subjected to extrusion processing, the α-Mg grains in the microstructure were significantly refined and a large number of 14H type long-period stacking ordered (LPSO) phases appeared on the α-Mg matrix. After activation, there were more nanosized Gd hydride/Mg2Ni intermetallics and finer chips. These modifications synergistically enhance the hydrogen storage properties. The findings have implications for the alloy design and manufacturing of magnesium-based hydrogen storage materials with the advantages of rapid mass production and anti-oxidation. © 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.en_AU
dc.identifier.citationYao, H., Zeng, G., Tan, X. F., Gu, Q., Nogita, K., Guo, J., & Li, Q. (2023). Hydrogen storage performance and phase transformations in as-cast and extruded Mg-Ni-Gd-Y-Zn-Cu alloys. Journal of Materials Science & Technology, 151, 162-177. doi:10.1016/j.jmst.2022.12.015en_AU
dc.identifier.issn1005-0302en_AU
dc.identifier.journaltitleJournal of Materials Science & Technologyen_AU
dc.identifier.pagination162-177en_AU
dc.identifier.urihttps://doi.org/https://doi.org/10.1016/j.jmst.2022.12.015en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14752en_AU
dc.identifier.volume151en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectMagnesium alloysen_AU
dc.subjectHydrogen storageen_AU
dc.subjectGrain refinementen_AU
dc.subjectSynchrotronsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectMaterialsen_AU
dc.titleHydrogen storage performance and phase transformations in as-cast and extruded Mg-Ni-Gd-Y-Zn-Cu alloysen_AU
dc.typeJournal Articleen_AU
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