Hydrogen storage properties of filings of the ZK60 alloy modified with 2.5 wt% mischmetal |
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| Affiliation: | 1. Institute of Engineering, Science and Technology (IECT), Federal University of Vales do Jequitinhonha e Mucuri (UFVJM), Janúba, MG, Brazil;2. Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil;3. São Carlos School of Engineering, University of São Paulo, Department of Materials Engineering (USP), São Carlos, SP, Brazil;4. School of Applied Sciences, State University of Campinas (UNICAMP), Limeira, SP, Brazil;5. Polytechnic Institute, Rio de Janeiro State University, Department of Materials, Nova Friburgo, RJ, Brazil;1. Department of Materials Physics, Eötvös University, P.O.B. 32, H-1518, Budapest, Hungary;2. Department of Chemistry, University of Sofia “St.Kl.Ohridski”, 1164, Sofia, Bulgaria;3. Center of Energy Research, Hungarian Academy of Sciences, H-1121, Budapest, Hungary;4. Physics of Nanostructured Materials, Faculty of Physics, University of Vienna, A-1090, Vienna, Austria;1. São Carlos School of Engineering (EESC), University of São Paulo (USP), Department of Materials Engineering, Av. João Dagnone 1100, CEP 13563-120, São Carlos/SP, Brazil;2. Federal Institute of Education, Science and Technology of São Paulo (IFSP), Department of Mechanics, Campus Itapetininga, Av.João Olímpio de Oliveira 1561, Vila Asem, CEP 18202-000, Itapetininga/SP, Brazil;3. German Aerospace Centre (DLR), Institute of Material Research, Linder Höhe, 51147 Cologne, Germany;1. Guangxi Novel Battery Materials Research Center of Engineering Technology, Universities Key Laboratory of Novel Energy Materials and Related Technology, School of Physical Science and Technology, Guangxi University, Nanning 530004, PR China;2. Department of Materials Science and Engineering, Baise College, Baise 533000, PR China;1. Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel;2. Grand Technion Energy Program (GTEP), Technion-Israel Institute of Technology, Haifa 32000, Israel;1. Department of Materials Engineering, Federal University of São Carlos, São Carlos, 13565-905, SP, Brazil;2. LEPMI Laboratory CNRS, UMR 5266 INPG – UJF, Grenoble, BP75, 38402, St-Martin D''Hères, France;3. SIMAP Laboratory CNRS, CNRS UMR 5266.INPG – UJF, Grenoble, BP75 – 38402, St-Martin D''Hères, France;4. Saint Petersburg State University, 28 Universitetsky Prospekt, Peterhof, Saint Petersburg, 198504, Russia;5. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marx Str., Ufa, 450000, Russian Federation;6. Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK |
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| Abstract: | In this study, a commercial Mg-based ZK60 alloy was modified with 2.5 wt% mischmetal (ZK60-2.5 wt%Mm) and further processed by cold rolling followed by manual filing. The chips obtained by manual filing process were collected from the as cast (AC) and the cold rolled (CR) materials. The hydrogen storage properties were evaluated by kinetics measurements at 350 °C. A full microstructural characterization including optical, scanning and transmission electron microscopy (MO, MEV and TEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) was performed in the samples. For the first absorption of both filed samples the H storage capacity showed a value around 6.0 wt% after 1 h while for the CR sample it was close to 1.25 wt% after the same time. The manual filing produced samples with higher hydrogenation kinetics compared with that of the CR sample. Besides, their hydrogen storage capacity was maintained close to the theoretical value (6.75 wt%). The breakage and pulverization of the intermetallic phases gave the chips from the CR alloy the faster hydrogenation kinetics, especially for H-desorption. |
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| Keywords: | ZK60 Mischmetal Cold rolling Manual filing Hydrogen storage |
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