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

作者：Tanaka Koji^*; Takeshita Hiroyuki T; Shin Ho; Kurumatani Kosuke; Kiyobayashi Tetsu; Takeichi Nobuhiko; Miyamura Hiroshi; Kikuchi Shiomi

来源：Materials Transactions, 2014, 55(8): 1122-1128.

DOI：10.2320/matertrans.MG201413

• super-laminate composites
• micro/nano-structural transition
• hydrogen absorption/desorption
• differential scanning calorimetry
• hydrogen absorption mechanism
• scanning electron microscope
• scanning transmission electron microscope

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 610K and a broad exothermic peak around at 570K connected with it in DSC profiles, respectively.

• 出版日期2014-8