Lima-Andreani, G.F.; Fazan, L.H.; Baptistella, E.B.; Oliveira, B.D.; Cardoso, K.R.; Travessa, D.N.; Neves, A.M.; Jorge, A.M., Jr. The Effect of Air Exposure on the Hydrogenation Properties of 2Mg-Fe Composite after Mechanical Alloying and Accumulative Roll Bonding (ARB). Metals2023, 13, 1544.
Lima-Andreani, G.F.; Fazan, L.H.; Baptistella, E.B.; Oliveira, B.D.; Cardoso, K.R.; Travessa, D.N.; Neves, A.M.; Jorge, A.M., Jr. The Effect of Air Exposure on the Hydrogenation Properties of 2Mg-Fe Composite after Mechanical Alloying and Accumulative Roll Bonding (ARB). Metals 2023, 13, 1544.
Lima-Andreani, G.F.; Fazan, L.H.; Baptistella, E.B.; Oliveira, B.D.; Cardoso, K.R.; Travessa, D.N.; Neves, A.M.; Jorge, A.M., Jr. The Effect of Air Exposure on the Hydrogenation Properties of 2Mg-Fe Composite after Mechanical Alloying and Accumulative Roll Bonding (ARB). Metals2023, 13, 1544.
Lima-Andreani, G.F.; Fazan, L.H.; Baptistella, E.B.; Oliveira, B.D.; Cardoso, K.R.; Travessa, D.N.; Neves, A.M.; Jorge, A.M., Jr. The Effect of Air Exposure on the Hydrogenation Properties of 2Mg-Fe Composite after Mechanical Alloying and Accumulative Roll Bonding (ARB). Metals 2023, 13, 1544.
Abstract
In this study, we successfully obtained a 2Mg-Fe mixture through mechanical alloying (MA) and processed it via accumulative roll bonding (ARB) (MA+ARB). Our primary focus was to analyze the impact of ambient air exposure while also evaluating the processing route. Some powder samples were exposed to air for 12 months before undergoing ARB processing. The Mg samples obtained after ARB processing exhibited a (002)-type texture. Our results demonstrate that all samples, including those processed via ARB, could rapidly absorb hydrogen within a matter of minutes, despite considerable differences in surface area between powders and rolled samples. ARB-processed samples reached approximately 60% of their maximum acquired capacity within just 24 minutes, compared to powders stored for a year which took 36 minutes. Also, the desorption temperatures were lower than those of MgH2. The absorption and desorption kinetics remained fast even after prolonged exposure to air. Although there were minor variations in capacities, our overall findings are promising since scalable techniques such as ARB have the potential to produce hydrogen storage materials that are both safe and cost-effective in a highly competitive market.
Keywords
2MgFe; complex hydride; oxidation; accumulative roll bonding (ARB); texture
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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