Abstract
To improve the hydrogen storage property of La–Y–Mg–Ni alloy, the La1.7Y0.3Mg16Ni alloys with an amorphous and nanocrystalline structure were prepared by ball milling the as-cast alloy for 5–30 h. The effects of microstructure on hydrogen storage property and its mechanism were analyzed. The results show that with prolonging milling time, the crystallinity, grain size and particle size decrease and the amorphous phases increase. The dual regulation of the nanocrystalline and amorphous phases results in the hydrogen storage kinetic property increasing at first and declining later. The 15 h-milled alloy gets the best hydrogenation and dehydrogenation kinetic property, which can absorb 3.10 wt.% hydrogen gas in 10 min at 373 K and has the lowest dehydrogenation activation energy of 71.2 kJ/mol. The thermodynamic property of the alloys milled for different time shows a little change, and the 15 h-milled alloy has the lowest dehydrogenation enthalpy change of 72.9 kJ/mol.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of Nonferrous Metals Society of China
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
