An investigation of hydrogen storage in a magnesium-based alloy processed by equal-channel angular pressing

Autor(es)

Jorge, Jr., Alberto Moreira ^[1] ; Prokofiev, Egor ^[1] ; de Lima, Gisele Ferreira ^[1] ; Rauch, Edgar ^[2] ; Veron, Muriel ^[2] ; Botta, Walter Jose ^[1] ; Kawasaki, Megumi ^{[3, 4]} ; Langdon, Terence G. ^{[3, 5]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Engn Mat, BR-13565905 Sao Carlos, SP - Brazil

^[2] UJF, SiMap Lab, CNRS, INPG, UMR 5266, F-38402 St Martin Dheres - France

^[3] Univ So Calif, Dept Aerosp & Mech Engn & Mat Sci & Mat Sci, Los Angeles, CA 90089 - USA

^[4] Hanyang Univ, Coll Engn, Div Mat Sci & Engn, Seoul 133791 - South Korea

^[5] Univ Southampton, Mat Res Grp, Fac Engn & Environm, Southampton SO17 1BJ, Hants - England

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 38, n. 20, p. 8306-8312, JUL 9 2013.
• Citações Web of Science: 52

Resumo

Equal-Channel Angular Pressing (ECAP) can be successfully used to process Mg and Mg-based hydrides to produce bulk samples with enhanced hydrogen sorption properties. The primary advantages associated with ECAP processing are the shorter processing time, lower cost and the production of safer and more air-resistant bulk material by comparison with powders produced by high-energy ball milling. ECAP can produce special features for hydrogen absorption such as preferential textures, an increased density of defects and submicrometer grain sizes. In this research, ECAP was used to process a commercial AZ31 extruded alloy in order to evaluate its use as a hydrogen storage material. The ECAP was conducted under conditions of temperature and number of passes in order to avoid grain growth. Additional experiments were conducted on commercial coarse-grained magnesium to evaluate the effect of sample thickness on the sorption properties. The ECAP sample was evaluated in two different orientations and it is shown that better hydrogen properties are related to a refined microstructure allied to the (0001) texture. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/51245-8 - Grain refinement and properties of ultrafine-grained AI, Mg and Ti alloys produced by equal-channel angular pressing with back-pressure
• Beneficiário: Alberto Moreira Jorge Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular