• Alberto Moreira Jorge
  • Egor Prokofiev
  • Gisele Ferreira De Lima
  • Edgar Rauch
  • Muriel Veron
  • Walter José Botta
  • Megumi Kawasaki
  • Terence G. Langdon

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. ©

Original languageEnglish
Pages (from-to)8306-8312
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number20
DOIs
StatePublished - 9 Jul 2013

    Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

    Research areas

  • Equal-channel angular pressing, Hydrogen storage, Magnesium alloys, Severe plastic deformation, Ultrafine grains

ID: 36048760