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Mass production of Mg2NiMg2Ni alloy bulk by isothermal evaporation casting process

2007; Elsevier BV; Volume: 32; Issue: 18 Linguagem: Inglês

10.1016/j.ijhydene.2007.06.023

1879-3487

Chain‐Shu Hsu, Shuncheng Lee, Rong-Ruey Jeng, Jing‐Yi Lin,

Magnesium Alloys: Properties and Applications

An innovative method, isothermal evaporation casting process (IECP), is developed to produce Mg2Ni alloy for mass production in this work. In the past, high vapor pressure of Mg was considered as a disadvantage for producing pure Mg2Ni alloy. However, this characteristic was used to develop a refinement procedure to separate primary Mg2Ni alloy from Mg/Mg2Ni 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 Mg2Ni alloy was successfully fabricated by IECP. For every 4.0 kg of raw materials, 2.6kgMg2Ni alloy bulk was extracted at a yield of about 65%. The hydrogen storage capacity of the well-activated Mg2Ni alloy reaches 3.58 wt% at 300 °C under 40 atm H2 atmosphere which is close to the theoretical capacity of 3.6 wt%.