Mass production of Mg2 Ni alloy bulk by isothermal evaporation casting process

Che Wei Hsu, Sheng Long Lee, Rong Ruey Jeng, Jing Chie Lin

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An innovative method, isothermal evaporation casting process (IECP), is developed to produce Mg2 Ni alloy for mass production in this work. In the past, high vapor pressure of Mg was considered as a disadvantage for producing pure Mg2 Ni alloy. However, this characteristic was used to develop a refinement procedure to separate primary Mg2 Ni alloy from Mg / Mg2 Ni eutectic matrix. Characteristics of as-cast specimens measured by X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and electron probe X-ray microanalyzer (EPMA) reveal that mass production of single phase Mg2 Ni alloy was successfully fabricated by IECP. For every 4.0 kg of raw materials, 2.6 kg Mg2 Ni alloy bulk was extracted at a yield of about 65%. The hydrogen storage capacity of the well-activated Mg2 Ni alloy reaches 3.58 wt% at 300 °C under 40 atm H2 atmosphere which is close to the theoretical capacity of 3.6 wt%.

Original languageEnglish
Pages (from-to)4907-4911
Number of pages5
JournalInternational Journal of Hydrogen Energy
Issue number18
StatePublished - Dec 2007


  • Hydrogen storage
  • IECP
  • Metal hydride
  • Mg Ni


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