S Kikuchi. Micro/nano-structural transition and hydrogen absorption mechanism in Mg/Cu super-laminate composites

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  • Tanaka Koji
    Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST)
  • Takeshita Hiroyuki T.
    Faculty of Chemistry, Materials and Bioengineering, Kansai University
  • Shin Ho
    Faculty of Chemistry, Materials and Bioengineering, Kansai University
  • Kurumatani Kosuke
    Faculty of Chemistry, Materials and Bioengineering, Kansai University
  • Kiyobayashi Tetsu
    Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST)
  • Takeichi Nobuhiko
    Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST)
  • Miyamura Hiroshi
    Department of Materials Science, University of Shiga Prefecture
  • Kikuchi Shiomi
    Department of Materials Science, University of Shiga Prefecture

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  • Micro/Nano-Structural Transition and Hydrogen Absorption Mechanism in Mg/Cu Super-Laminate Composites

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The micro/nano-structural transition and hydrogen absorption mechanism in Mg/Cu super-laminate composites (SLCs) were investigated. Differential scanning calorimetry (DSC) measurements were performed on Mg/Cu SLCs at several heating rate and till several repetition cycles up to twenty cycles, and micro/nano-structures of Mg/Cu SLCs were examined by stereomicroscope, digital-microscope, scanning electron microscope (SEM), and scanning transmission electron microscope (STEM). It is found that the micro/nano-stractures of Mg/Cu SLCs change drastically at early cycles and reach a steady state after around the tenth cycle. The detailed examination of DSC curves, and SEM and STEM observations of Mg/Cu SLCs suggest that the hydrogen absorption process consists of a fast and a slow reaction which shows a sharp exothermic peak around at 610 K and a broad exothermic peak around at 570 K connected with it in DSC profiles, respectively.

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